annotate src/memfile.c @ 1416:0a80dc6d7804 v7.1.131

updated for version 7.1-131
author vimboss
date Tue, 02 Oct 2007 18:40:57 +0000
parents cab25717c6a6
children ebe059f69b9e
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7
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1 /* vi:set ts=8 sts=4 sw=4:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9
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10 /*
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11 * memfile.c: Contains the functions for handling blocks of memory which can
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12 * be stored in a file. This is the implementation of a sort of virtual memory.
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13 *
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14 * A memfile consists of a sequence of blocks. The blocks numbered from 0
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15 * upwards have been assigned a place in the actual file. The block number
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16 * is equal to the page number in the file. The
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17 * blocks with negative numbers are currently in memory only. They can be
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18 * assigned a place in the file when too much memory is being used. At that
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19 * moment they get a new, positive, number. A list is used for translation of
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20 * negative to positive numbers.
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21 *
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22 * The size of a block is a multiple of a page size, normally the page size of
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23 * the device the file is on. Most blocks are 1 page long. A Block of multiple
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24 * pages is used for a line that does not fit in a single page.
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25 *
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26 * Each block can be in memory and/or in a file. The block stays in memory
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27 * as long as it is locked. If it is no longer locked it can be swapped out to
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28 * the file. It is only written to the file if it has been changed.
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29 *
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30 * Under normal operation the file is created when opening the memory file and
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31 * deleted when closing the memory file. Only with recovery an existing memory
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32 * file is opened.
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33 */
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34
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35 #if defined MSDOS || defined(WIN32) || defined(_WIN64)
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36 # include "vimio.h" /* for lseek(), must be before vim.h */
7
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37 #endif
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38
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39 #include "vim.h"
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40
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41 #ifdef HAVE_FCNTL_H
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42 # include <fcntl.h>
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43 #endif
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44
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45 /*
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46 * Some systems have the page size in statfs.f_bsize, some in stat.st_blksize
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47 */
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48 #ifdef HAVE_ST_BLKSIZE
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49 # define STATFS stat
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50 # define F_BSIZE st_blksize
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51 # define fstatfs(fd, buf, len, nul) mch_fstat((fd), (buf))
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52 #else
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53 # ifdef HAVE_SYS_STATFS_H
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54 # include <sys/statfs.h>
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55 # define STATFS statfs
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56 # define F_BSIZE f_bsize
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57 # ifdef __MINT__ /* do we still need this? */
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58 # define fstatfs(fd, buf, len, nul) mch_fstat((fd), (buf))
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59 # endif
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60 # endif
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61 #endif
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62
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63 /*
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64 * for Amiga Dos 2.0x we use Flush
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65 */
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66 #ifdef AMIGA
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67 # ifdef FEAT_ARP
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68 extern int dos2; /* this is in os_amiga.c */
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69 # endif
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70 # ifdef SASC
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71 # include <proto/dos.h>
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72 # include <ios1.h> /* for chkufb() */
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73 # endif
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74 #endif
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75
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76 #define MEMFILE_PAGE_SIZE 4096 /* default page size */
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77
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78 static long_u total_mem_used = 0; /* total memory used for memfiles */
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79
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80 static void mf_ins_hash __ARGS((memfile_T *, bhdr_T *));
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81 static void mf_rem_hash __ARGS((memfile_T *, bhdr_T *));
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82 static bhdr_T *mf_find_hash __ARGS((memfile_T *, blocknr_T));
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83 static void mf_ins_used __ARGS((memfile_T *, bhdr_T *));
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84 static void mf_rem_used __ARGS((memfile_T *, bhdr_T *));
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85 static bhdr_T *mf_release __ARGS((memfile_T *, int));
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86 static bhdr_T *mf_alloc_bhdr __ARGS((memfile_T *, int));
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87 static void mf_free_bhdr __ARGS((bhdr_T *));
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88 static void mf_ins_free __ARGS((memfile_T *, bhdr_T *));
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89 static bhdr_T *mf_rem_free __ARGS((memfile_T *));
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90 static int mf_read __ARGS((memfile_T *, bhdr_T *));
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91 static int mf_write __ARGS((memfile_T *, bhdr_T *));
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92 static int mf_trans_add __ARGS((memfile_T *, bhdr_T *));
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93 static void mf_do_open __ARGS((memfile_T *, char_u *, int));
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94
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95 /*
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96 * The functions for using a memfile:
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97 *
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98 * mf_open() open a new or existing memfile
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99 * mf_open_file() open a swap file for an existing memfile
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100 * mf_close() close (and delete) a memfile
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101 * mf_new() create a new block in a memfile and lock it
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102 * mf_get() get an existing block and lock it
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103 * mf_put() unlock a block, may be marked for writing
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104 * mf_free() remove a block
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105 * mf_sync() sync changed parts of memfile to disk
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106 * mf_release_all() release as much memory as possible
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107 * mf_trans_del() may translate negative to positive block number
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108 * mf_fullname() make file name full path (use before first :cd)
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109 */
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110
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111 /*
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112 * Open an existing or new memory block file.
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113 *
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114 * fname: name of file to use (NULL means no file at all)
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115 * Note: fname must have been allocated, it is not copied!
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116 * If opening the file fails, fname is freed.
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117 * flags: flags for open() call
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118 *
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119 * If fname != NULL and file cannot be opened, fail.
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120 *
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121 * return value: identifier for this memory block file.
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122 */
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123 memfile_T *
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124 mf_open(fname, flags)
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125 char_u *fname;
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126 int flags;
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127 {
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128 memfile_T *mfp;
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129 int i;
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130 off_t size;
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131 #if defined(STATFS) && defined(UNIX) && !defined(__QNX__)
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132 # define USE_FSTATFS
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133 struct STATFS stf;
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134 #endif
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135
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136 if ((mfp = (memfile_T *)alloc((unsigned)sizeof(memfile_T))) == NULL)
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137 return NULL;
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138
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139 if (fname == NULL) /* no file for this memfile, use memory only */
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140 {
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141 mfp->mf_fname = NULL;
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142 mfp->mf_ffname = NULL;
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143 mfp->mf_fd = -1;
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144 }
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145 else
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146 {
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147 mf_do_open(mfp, fname, flags); /* try to open the file */
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148
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149 /* if the file cannot be opened, return here */
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150 if (mfp->mf_fd < 0)
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151 {
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152 vim_free(mfp);
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153 return NULL;
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154 }
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155 }
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156
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157 mfp->mf_free_first = NULL; /* free list is empty */
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158 mfp->mf_used_first = NULL; /* used list is empty */
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159 mfp->mf_used_last = NULL;
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160 mfp->mf_dirty = FALSE;
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161 mfp->mf_used_count = 0;
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162 for (i = 0; i < MEMHASHSIZE; ++i)
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163 {
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164 mfp->mf_hash[i] = NULL; /* hash lists are empty */
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165 mfp->mf_trans[i] = NULL; /* trans lists are empty */
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166 }
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167 mfp->mf_page_size = MEMFILE_PAGE_SIZE;
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168
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169 #ifdef USE_FSTATFS
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170 /*
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171 * Try to set the page size equal to the block size of the device.
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172 * Speeds up I/O a lot.
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173 * When recovering, the actual block size will be retrieved from block 0
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174 * in ml_recover(). The size used here may be wrong, therefore
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175 * mf_blocknr_max must be rounded up.
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176 */
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177 if (mfp->mf_fd >= 0
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178 && fstatfs(mfp->mf_fd, &stf, sizeof(struct statfs), 0) == 0
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179 && stf.F_BSIZE >= MIN_SWAP_PAGE_SIZE
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180 && stf.F_BSIZE <= MAX_SWAP_PAGE_SIZE)
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181 mfp->mf_page_size = stf.F_BSIZE;
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182 #endif
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183
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184 if (mfp->mf_fd < 0 || (flags & (O_TRUNC|O_EXCL))
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185 || (size = lseek(mfp->mf_fd, (off_t)0L, SEEK_END)) <= 0)
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186 mfp->mf_blocknr_max = 0; /* no file or empty file */
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187 else
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188 mfp->mf_blocknr_max = (blocknr_T)((size + mfp->mf_page_size - 1)
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vimboss
parents:
diff changeset
189 / mfp->mf_page_size);
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parents:
diff changeset
190 mfp->mf_blocknr_min = -1;
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vimboss
parents:
diff changeset
191 mfp->mf_neg_count = 0;
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vimboss
parents:
diff changeset
192 mfp->mf_infile_count = mfp->mf_blocknr_max;
1230
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vimboss
parents: 1226
diff changeset
193
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vimboss
parents: 1226
diff changeset
194 /*
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vimboss
parents: 1226
diff changeset
195 * Compute maximum number of pages ('maxmem' is in Kbyte):
cab25717c6a6 updated for version 7.1b-002
vimboss
parents: 1226
diff changeset
196 * 'mammem' * 1Kbyte / page-size-in-bytes.
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vimboss
parents: 1226
diff changeset
197 * Avoid overflow by first reducing page size as much as possible.
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vimboss
parents: 1226
diff changeset
198 */
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vimboss
parents: 1226
diff changeset
199 {
cab25717c6a6 updated for version 7.1b-002
vimboss
parents: 1226
diff changeset
200 int shift = 10;
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vimboss
parents: 1226
diff changeset
201 unsigned page_size = mfp->mf_page_size;
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vimboss
parents: 1226
diff changeset
202
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vimboss
parents: 1226
diff changeset
203 while (shift > 0 && (page_size & 1) == 0)
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vimboss
parents: 1226
diff changeset
204 {
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vimboss
parents: 1226
diff changeset
205 page_size = page_size >> 1;
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vimboss
parents: 1226
diff changeset
206 --shift;
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vimboss
parents: 1226
diff changeset
207 }
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vimboss
parents: 1226
diff changeset
208 mfp->mf_used_count_max = (p_mm << shift) / page_size;
cab25717c6a6 updated for version 7.1b-002
vimboss
parents: 1226
diff changeset
209 if (mfp->mf_used_count_max < 10)
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vimboss
parents: 1226
diff changeset
210 mfp->mf_used_count_max = 10;
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vimboss
parents: 1226
diff changeset
211 }
7
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parents:
diff changeset
212
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parents:
diff changeset
213 return mfp;
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parents:
diff changeset
214 }
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vimboss
parents:
diff changeset
215
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vimboss
parents:
diff changeset
216 /*
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vimboss
parents:
diff changeset
217 * Open a file for an existing memfile. Used when updatecount set from 0 to
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
218 * some value.
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parents:
diff changeset
219 * If the file already exists, this fails.
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parents:
diff changeset
220 * "fname" is the name of file to use (NULL means no file at all)
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vimboss
parents:
diff changeset
221 * Note: "fname" must have been allocated, it is not copied! If opening the
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
222 * file fails, "fname" is freed.
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vimboss
parents:
diff changeset
223 *
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parents:
diff changeset
224 * return value: FAIL if file could not be opened, OK otherwise
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vimboss
parents:
diff changeset
225 */
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vimboss
parents:
diff changeset
226 int
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parents:
diff changeset
227 mf_open_file(mfp, fname)
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vimboss
parents:
diff changeset
228 memfile_T *mfp;
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vimboss
parents:
diff changeset
229 char_u *fname;
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vimboss
parents:
diff changeset
230 {
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parents:
diff changeset
231 mf_do_open(mfp, fname, O_RDWR|O_CREAT|O_EXCL); /* try to open the file */
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vimboss
parents:
diff changeset
232
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parents:
diff changeset
233 if (mfp->mf_fd < 0)
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parents:
diff changeset
234 return FAIL;
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parents:
diff changeset
235
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parents:
diff changeset
236 mfp->mf_dirty = TRUE;
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vimboss
parents:
diff changeset
237 return OK;
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vimboss
parents:
diff changeset
238 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
239
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vimboss
parents:
diff changeset
240 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
241 * close a memory file and delete the associated file if 'del_file' is TRUE
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
242 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
243 void
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vimboss
parents:
diff changeset
244 mf_close(mfp, del_file)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
245 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
246 int del_file;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
247 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
248 bhdr_T *hp, *nextp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
249 NR_TRANS *tp, *tpnext;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
250 int i;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
251
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
252 if (mfp == NULL) /* safety check */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
253 return;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
254 if (mfp->mf_fd >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
255 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
256 if (close(mfp->mf_fd) < 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
257 EMSG(_(e_swapclose));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
258 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
259 if (del_file && mfp->mf_fname != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
260 mch_remove(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
261 /* free entries in used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
262 for (hp = mfp->mf_used_first; hp != NULL; hp = nextp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
263 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
264 total_mem_used -= hp->bh_page_count * mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
265 nextp = hp->bh_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
266 mf_free_bhdr(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
267 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
268 while (mfp->mf_free_first != NULL) /* free entries in free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
269 vim_free(mf_rem_free(mfp));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
270 for (i = 0; i < MEMHASHSIZE; ++i) /* free entries in trans lists */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
271 for (tp = mfp->mf_trans[i]; tp != NULL; tp = tpnext)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
272 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
273 tpnext = tp->nt_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
274 vim_free(tp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
275 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
276 vim_free(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
277 vim_free(mfp->mf_ffname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
278 vim_free(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
279 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
280
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vimboss
parents:
diff changeset
281 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
282 * Close the swap file for a memfile. Used when 'swapfile' is reset.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
283 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
284 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
285 mf_close_file(buf, getlines)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
286 buf_T *buf;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
287 int getlines; /* get all lines into memory? */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
288 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
289 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
290 linenr_T lnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
291
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
292 mfp = buf->b_ml.ml_mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
293 if (mfp == NULL || mfp->mf_fd < 0) /* nothing to close */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
294 return;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
295
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
296 if (getlines)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
297 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
298 /* get all blocks in memory by accessing all lines (clumsy!) */
1066
bffbbb566d6b updated for version 7.0-192
vimboss
parents: 1033
diff changeset
299 mf_dont_release = TRUE;
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
300 for (lnum = 1; lnum <= buf->b_ml.ml_line_count; ++lnum)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
301 (void)ml_get_buf(buf, lnum, FALSE);
1066
bffbbb566d6b updated for version 7.0-192
vimboss
parents: 1033
diff changeset
302 mf_dont_release = FALSE;
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
303 /* TODO: should check if all blocks are really in core */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
304 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
305
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
306 if (close(mfp->mf_fd) < 0) /* close the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
307 EMSG(_(e_swapclose));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
308 mfp->mf_fd = -1;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
309
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
310 if (mfp->mf_fname != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
311 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
312 mch_remove(mfp->mf_fname); /* delete the swap file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
313 vim_free(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
314 vim_free(mfp->mf_ffname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
315 mfp->mf_fname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
316 mfp->mf_ffname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
317 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
318 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
319
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
320 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
321 * Set new size for a memfile. Used when block 0 of a swapfile has been read
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
322 * and the size it indicates differs from what was guessed.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
323 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
324 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
325 mf_new_page_size(mfp, new_size)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
326 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
327 unsigned new_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
328 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
329 /* Correct the memory used for block 0 to the new size, because it will be
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
330 * freed with that size later on. */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
331 total_mem_used += new_size - mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
332 mfp->mf_page_size = new_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
333 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
334
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
335 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
336 * get a new block
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
337 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
338 * negative: TRUE if negative block number desired (data block)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
339 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
340 bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
341 mf_new(mfp, negative, page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
342 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
343 int negative;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
344 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
345 {
1166
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
346 bhdr_T *hp; /* new bhdr_T */
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
347 bhdr_T *freep; /* first block in free list */
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
348 char_u *p;
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
349
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
350 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
351 * If we reached the maximum size for the used memory blocks, release one
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
352 * If a bhdr_T is returned, use it and adjust the page_count if necessary.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
353 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
354 hp = mf_release(mfp, page_count);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
355
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
356 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
357 * Decide on the number to use:
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
358 * If there is a free block, use its number.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
359 * Otherwise use mf_block_min for a negative number, mf_block_max for
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
360 * a positive number.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
361 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
362 freep = mfp->mf_free_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
363 if (!negative && freep != NULL && freep->bh_page_count >= page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
364 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
365 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
366 * If the block in the free list has more pages, take only the number
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
367 * of pages needed and allocate a new bhdr_T with data
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
368 *
1166
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
369 * If the number of pages matches and mf_release() did not return a
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
370 * bhdr_T, use the bhdr_T from the free list and allocate the data
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
371 *
1166
6eb9fc75ab0b updated for version 7.1a
vimboss
parents: 1066
diff changeset
372 * If the number of pages matches and mf_release() returned a bhdr_T,
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
373 * just use the number and free the bhdr_T from the free list
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
374 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
375 if (freep->bh_page_count > page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
376 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
377 if (hp == NULL && (hp = mf_alloc_bhdr(mfp, page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
378 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
379 hp->bh_bnum = freep->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
380 freep->bh_bnum += page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
381 freep->bh_page_count -= page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
382 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
383 else if (hp == NULL) /* need to allocate memory for this block */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
384 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
385 if ((p = (char_u *)alloc(mfp->mf_page_size * page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
386 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
387 hp = mf_rem_free(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
388 hp->bh_data = p;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
389 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
390 else /* use the number, remove entry from free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
391 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
392 freep = mf_rem_free(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
393 hp->bh_bnum = freep->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
394 vim_free(freep);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
395 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
396 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
397 else /* get a new number */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
398 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
399 if (hp == NULL && (hp = mf_alloc_bhdr(mfp, page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
400 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
401 if (negative)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
402 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
403 hp->bh_bnum = mfp->mf_blocknr_min--;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
404 mfp->mf_neg_count++;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
405 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
406 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
407 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
408 hp->bh_bnum = mfp->mf_blocknr_max;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
409 mfp->mf_blocknr_max += page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
410 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
411 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
412 hp->bh_flags = BH_LOCKED | BH_DIRTY; /* new block is always dirty */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
413 mfp->mf_dirty = TRUE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
414 hp->bh_page_count = page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
415 mf_ins_used(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
416 mf_ins_hash(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
417
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
418 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
419 * Init the data to all zero, to avoid reading uninitialized data.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
420 * This also avoids that the passwd file ends up in the swap file!
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
421 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
422 (void)vim_memset((char *)(hp->bh_data), 0, (size_t)mfp->mf_page_size);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
423
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
424 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
425 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
426
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
427 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
428 * get existing block 'nr' with 'page_count' pages
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
429 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
430 * Note: The caller should first check a negative nr with mf_trans_del()
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
431 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
432 bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
433 mf_get(mfp, nr, page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
434 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
435 blocknr_T nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
436 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
437 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
438 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
439 /* doesn't exist */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
440 if (nr >= mfp->mf_blocknr_max || nr <= mfp->mf_blocknr_min)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
441 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
442
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
443 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
444 * see if it is in the cache
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
445 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
446 hp = mf_find_hash(mfp, nr);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
447 if (hp == NULL) /* not in the hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
448 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
449 if (nr < 0 || nr >= mfp->mf_infile_count) /* can't be in the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
450 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
451
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
452 /* could check here if the block is in the free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
453
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
454 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
455 * Check if we need to flush an existing block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
456 * If so, use that block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
457 * If not, allocate a new block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
458 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
459 hp = mf_release(mfp, page_count);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
460 if (hp == NULL && (hp = mf_alloc_bhdr(mfp, page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
461 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
462
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
463 hp->bh_bnum = nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
464 hp->bh_flags = 0;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
465 hp->bh_page_count = page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
466 if (mf_read(mfp, hp) == FAIL) /* cannot read the block! */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
467 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
468 mf_free_bhdr(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
469 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
470 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
471 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
472 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
473 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
474 mf_rem_used(mfp, hp); /* remove from list, insert in front below */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
475 mf_rem_hash(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
476 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
477
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
478 hp->bh_flags |= BH_LOCKED;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
479 mf_ins_used(mfp, hp); /* put in front of used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
480 mf_ins_hash(mfp, hp); /* put in front of hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
481
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
482 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
483 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
484
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
485 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
486 * release the block *hp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
487 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
488 * dirty: Block must be written to file later
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
489 * infile: Block should be in file (needed for recovery)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
490 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
491 * no return value, function cannot fail
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
492 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
493 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
494 mf_put(mfp, hp, dirty, infile)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
495 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
496 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
497 int dirty;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
498 int infile;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
499 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
500 int flags;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
501
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
502 flags = hp->bh_flags;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
503
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
504 if ((flags & BH_LOCKED) == 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
505 EMSG(_("E293: block was not locked"));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
506 flags &= ~BH_LOCKED;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
507 if (dirty)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
508 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
509 flags |= BH_DIRTY;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
510 mfp->mf_dirty = TRUE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
511 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
512 hp->bh_flags = flags;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
513 if (infile)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
514 mf_trans_add(mfp, hp); /* may translate negative in positive nr */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
515 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
516
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
517 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
518 * block *hp is no longer in used, may put it in the free list of memfile *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
519 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
520 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
521 mf_free(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
522 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
523 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
524 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
525 vim_free(hp->bh_data); /* free the memory */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
526 mf_rem_hash(mfp, hp); /* get *hp out of the hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
527 mf_rem_used(mfp, hp); /* get *hp out of the used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
528 if (hp->bh_bnum < 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
529 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
530 vim_free(hp); /* don't want negative numbers in free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
531 mfp->mf_neg_count--;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
532 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
533 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
534 mf_ins_free(mfp, hp); /* put *hp in the free list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
535 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
536
984
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
537 #if defined(__MORPHOS__) && defined(__libnix__)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
538 /* function is missing in MorphOS libnix version */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
539 extern unsigned long *__stdfiledes;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
540
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
541 static unsigned long
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
542 fdtofh(int filedescriptor)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
543 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
544 return __stdfiledes[filedescriptor];
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
545 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
546 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
547
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
548 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
549 * Sync the memory file *mfp to disk.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
550 * Flags:
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
551 * MFS_ALL If not given, blocks with negative numbers are not synced,
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
552 * even when they are dirty!
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
553 * MFS_STOP Stop syncing when a character becomes available, but sync at
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
554 * least one block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
555 * MFS_FLUSH Make sure buffers are flushed to disk, so they will survive a
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
556 * system crash.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
557 * MFS_ZERO Only write block 0.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
558 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
559 * Return FAIL for failure, OK otherwise
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
560 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
561 int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
562 mf_sync(mfp, flags)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
563 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
564 int flags;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
565 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
566 int status;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
567 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
568 #if defined(SYNC_DUP_CLOSE) && !defined(MSDOS)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
569 int fd;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
570 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
571 int got_int_save = got_int;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
572
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
573 if (mfp->mf_fd < 0) /* there is no file, nothing to do */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
574 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
575 mfp->mf_dirty = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
576 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
577 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
578
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
579 /* Only a CTRL-C while writing will break us here, not one typed
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
580 * previously. */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
581 got_int = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
582
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
583 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
584 * sync from last to first (may reduce the probability of an inconsistent
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
585 * file) If a write fails, it is very likely caused by a full filesystem.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
586 * Then we only try to write blocks within the existing file. If that also
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
587 * fails then we give up.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
588 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
589 status = OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
590 for (hp = mfp->mf_used_last; hp != NULL; hp = hp->bh_prev)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
591 if (((flags & MFS_ALL) || hp->bh_bnum >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
592 && (hp->bh_flags & BH_DIRTY)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
593 && (status == OK || (hp->bh_bnum >= 0
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
594 && hp->bh_bnum < mfp->mf_infile_count)))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
595 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
596 if ((flags & MFS_ZERO) && hp->bh_bnum != 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
597 continue;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
598 if (mf_write(mfp, hp) == FAIL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
599 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
600 if (status == FAIL) /* double error: quit syncing */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
601 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
602 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
603 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
604 if (flags & MFS_STOP)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
605 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
606 /* Stop when char available now. */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
607 if (ui_char_avail())
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
608 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
609 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
610 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
611 ui_breakcheck();
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
612 if (got_int)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
613 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
614 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
615
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
616 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
617 * If the whole list is flushed, the memfile is not dirty anymore.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
618 * In case of an error this flag is also set, to avoid trying all the time.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
619 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
620 if (hp == NULL || status == FAIL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
621 mfp->mf_dirty = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
622
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
623 if ((flags & MFS_FLUSH) && *p_sws != NUL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
624 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
625 #if defined(UNIX)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
626 # ifdef HAVE_FSYNC
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
627 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
628 * most Unixes have the very useful fsync() function, just what we need.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
629 * However, with OS/2 and EMX it is also available, but there are
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
630 * reports of bad problems with it (a bug in HPFS.IFS).
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
631 * So we disable use of it here in case someone tries to be smart
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
632 * and changes os_os2_cfg.h... (even though there is no __EMX__ test
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
633 * in the #if, as __EMX__ does not have sync(); we hope for a timely
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
634 * sync from the system itself).
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
635 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
636 # if defined(__EMX__)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
637 error "Dont use fsync with EMX! Read emxdoc.doc or emxfix01.doc for info."
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
638 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
639 if (STRCMP(p_sws, "fsync") == 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
640 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
641 if (fsync(mfp->mf_fd))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
642 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
643 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
644 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
645 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
646 /* OpenNT is strictly POSIX (Benzinger) */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
647 /* Tandem/Himalaya NSK-OSS doesn't have sync() */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
648 # if defined(__OPENNT) || defined(__TANDEM)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
649 fflush(NULL);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
650 # else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
651 sync();
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
652 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
653 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
654 #ifdef VMS
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
655 if (STRCMP(p_sws, "fsync") == 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
656 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
657 if (fsync(mfp->mf_fd))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
658 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
659 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
660 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
661 #ifdef MSDOS
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
662 if (_dos_commit(mfp->mf_fd))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
663 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
664 #else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
665 # ifdef SYNC_DUP_CLOSE
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
666 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
667 * Win32 is a bit more work: Duplicate the file handle and close it.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
668 * This should flush the file to disk.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
669 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
670 if ((fd = dup(mfp->mf_fd)) >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
671 close(fd);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
672 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
673 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
674 #ifdef AMIGA
1030
d4bc24e6a281 updated for version 7.0-156
vimboss
parents: 984
diff changeset
675 # if defined(__AROS__) || defined(__amigaos4__)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
676 if (fsync(mfp->mf_fd) != 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
677 status = FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
678 # else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
679 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
680 * Flush() only exists for AmigaDos 2.0.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
681 * For 1.3 it should be done with close() + open(), but then the risk
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
682 * is that the open() may fail and lose the file....
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
683 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
684 # ifdef FEAT_ARP
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
685 if (dos2)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
686 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
687 # ifdef SASC
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
688 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
689 struct UFB *fp = chkufb(mfp->mf_fd);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
690
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
691 if (fp != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
692 Flush(fp->ufbfh);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
693 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
694 # else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
695 # if defined(_DCC) || defined(__GNUC__) || defined(__MORPHOS__)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
696 {
984
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
697 # if defined(__GNUC__) && !defined(__MORPHOS__) && defined(__libnix__)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
698 /* Have function (in libnix at least),
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
699 * but ain't got no prototype anywhere. */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
700 extern unsigned long fdtofh(int filedescriptor);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
701 # endif
984
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
702 # if !defined(__libnix__)
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
703 fflush(NULL);
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
704 # else
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
705 BPTR fh = (BPTR)fdtofh(mfp->mf_fd);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
706
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
707 if (fh != 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
708 Flush(fh);
984
fa9ee618000f updated for version 7.0-110
vimboss
parents: 714
diff changeset
709 # endif
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
710 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
711 # else /* assume Manx */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
712 Flush(_devtab[mfp->mf_fd].fd);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
713 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
714 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
715 # endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
716 #endif /* AMIGA */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
717 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
718
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
719 got_int |= got_int_save;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
720
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
721 return status;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
722 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
723
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
724 /*
630
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
725 * For all blocks in memory file *mfp that have a positive block number set
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
726 * the dirty flag. These are blocks that need to be written to a newly
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
727 * created swapfile.
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
728 */
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
729 void
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
730 mf_set_dirty(mfp)
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
731 memfile_T *mfp;
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
732 {
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
733 bhdr_T *hp;
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
734
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
735 for (hp = mfp->mf_used_last; hp != NULL; hp = hp->bh_prev)
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
736 if (hp->bh_bnum > 0)
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
737 hp->bh_flags |= BH_DIRTY;
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
738 mfp->mf_dirty = TRUE;
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
739 }
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
740
52c87a746f4a updated for version 7.0181
vimboss
parents: 557
diff changeset
741 /*
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
742 * insert block *hp in front of hashlist of memfile *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
743 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
744 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
745 mf_ins_hash(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
746 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
747 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
748 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
749 bhdr_T *hhp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
750 int hash;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
751
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
752 hash = MEMHASH(hp->bh_bnum);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
753 hhp = mfp->mf_hash[hash];
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
754 hp->bh_hash_next = hhp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
755 hp->bh_hash_prev = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
756 if (hhp != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
757 hhp->bh_hash_prev = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
758 mfp->mf_hash[hash] = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
759 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
760
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
761 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
762 * remove block *hp from hashlist of memfile list *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
763 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
764 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
765 mf_rem_hash(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
766 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
767 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
768 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
769 if (hp->bh_hash_prev == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
770 mfp->mf_hash[MEMHASH(hp->bh_bnum)] = hp->bh_hash_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
771 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
772 hp->bh_hash_prev->bh_hash_next = hp->bh_hash_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
773
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
774 if (hp->bh_hash_next)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
775 hp->bh_hash_next->bh_hash_prev = hp->bh_hash_prev;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
776 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
777
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
778 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
779 * look in hash lists of memfile *mfp for block header with number 'nr'
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
780 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
781 static bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
782 mf_find_hash(mfp, nr)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
783 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
784 blocknr_T nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
785 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
786 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
787
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
788 for (hp = mfp->mf_hash[MEMHASH(nr)]; hp != NULL; hp = hp->bh_hash_next)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
789 if (hp->bh_bnum == nr)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
790 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
791 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
792 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
793
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
794 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
795 * insert block *hp in front of used list of memfile *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
796 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
797 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
798 mf_ins_used(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
799 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
800 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
801 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
802 hp->bh_next = mfp->mf_used_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
803 mfp->mf_used_first = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
804 hp->bh_prev = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
805 if (hp->bh_next == NULL) /* list was empty, adjust last pointer */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
806 mfp->mf_used_last = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
807 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
808 hp->bh_next->bh_prev = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
809 mfp->mf_used_count += hp->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
810 total_mem_used += hp->bh_page_count * mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
811 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
812
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
813 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
814 * remove block *hp from used list of memfile *mfp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
815 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
816 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
817 mf_rem_used(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
818 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
819 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
820 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
821 if (hp->bh_next == NULL) /* last block in used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
822 mfp->mf_used_last = hp->bh_prev;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
823 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
824 hp->bh_next->bh_prev = hp->bh_prev;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
825 if (hp->bh_prev == NULL) /* first block in used list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
826 mfp->mf_used_first = hp->bh_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
827 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
828 hp->bh_prev->bh_next = hp->bh_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
829 mfp->mf_used_count -= hp->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
830 total_mem_used -= hp->bh_page_count * mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
831 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
832
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
833 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
834 * Release the least recently used block from the used list if the number
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
835 * of used memory blocks gets to big.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
836 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
837 * Return the block header to the caller, including the memory block, so
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
838 * it can be re-used. Make sure the page_count is right.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
839 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
840 static bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
841 mf_release(mfp, page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
842 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
843 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
844 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
845 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
846 int need_release;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
847 buf_T *buf;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
848
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
849 /* don't release while in mf_close_file() */
1066
bffbbb566d6b updated for version 7.0-192
vimboss
parents: 1033
diff changeset
850 if (mf_dont_release)
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
851 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
852
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
853 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
854 * Need to release a block if the number of blocks for this memfile is
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
855 * higher than the maximum or total memory used is over 'maxmemtot'
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
856 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
857 need_release = ((mfp->mf_used_count >= mfp->mf_used_count_max)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
858 || (total_mem_used >> 10) >= (long_u)p_mmt);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
859
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
860 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
861 * Try to create a swap file if the amount of memory used is getting too
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
862 * high.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
863 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
864 if (mfp->mf_fd < 0 && need_release && p_uc)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
865 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
866 /* find for which buffer this memfile is */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
867 for (buf = firstbuf; buf != NULL; buf = buf->b_next)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
868 if (buf->b_ml.ml_mfp == mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
869 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
870 if (buf != NULL && buf->b_may_swap)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
871 ml_open_file(buf);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
872 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
873
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
874 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
875 * don't release a block if
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
876 * there is no file for this memfile
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
877 * or
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
878 * the number of blocks for this memfile is lower than the maximum
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
879 * and
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
880 * total memory used is not up to 'maxmemtot'
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
881 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
882 if (mfp->mf_fd < 0 || !need_release)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
883 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
884
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
885 for (hp = mfp->mf_used_last; hp != NULL; hp = hp->bh_prev)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
886 if (!(hp->bh_flags & BH_LOCKED))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
887 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
888 if (hp == NULL) /* not a single one that can be released */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
889 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
890
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
891 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
892 * If the block is dirty, write it.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
893 * If the write fails we don't free it.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
894 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
895 if ((hp->bh_flags & BH_DIRTY) && mf_write(mfp, hp) == FAIL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
896 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
897
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
898 mf_rem_used(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
899 mf_rem_hash(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
900
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
901 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
902 * If a bhdr_T is returned, make sure that the page_count of bh_data is
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
903 * right
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
904 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
905 if (hp->bh_page_count != page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
906 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
907 vim_free(hp->bh_data);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
908 if ((hp->bh_data = alloc(mfp->mf_page_size * page_count)) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
909 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
910 vim_free(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
911 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
912 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
913 hp->bh_page_count = page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
914 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
915 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
916 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
917
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
918 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
919 * release as many blocks as possible
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
920 * Used in case of out of memory
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
921 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
922 * return TRUE if any memory was released
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
923 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
924 int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
925 mf_release_all()
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
926 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
927 buf_T *buf;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
928 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
929 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
930 int retval = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
931
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
932 for (buf = firstbuf; buf != NULL; buf = buf->b_next)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
933 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
934 mfp = buf->b_ml.ml_mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
935 if (mfp != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
936 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
937 /* If no swap file yet, may open one */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
938 if (mfp->mf_fd < 0 && buf->b_may_swap)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
939 ml_open_file(buf);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
940
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
941 /* only if there is a swapfile */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
942 if (mfp->mf_fd >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
943 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
944 for (hp = mfp->mf_used_last; hp != NULL; )
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
945 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
946 if (!(hp->bh_flags & BH_LOCKED)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
947 && (!(hp->bh_flags & BH_DIRTY)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
948 || mf_write(mfp, hp) != FAIL))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
949 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
950 mf_rem_used(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
951 mf_rem_hash(mfp, hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
952 mf_free_bhdr(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
953 hp = mfp->mf_used_last; /* re-start, list was changed */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
954 retval = TRUE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
955 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
956 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
957 hp = hp->bh_prev;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
958 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
959 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
960 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
961 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
962 return retval;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
963 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
964
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
965 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
966 * Allocate a block header and a block of memory for it
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
967 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
968 static bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
969 mf_alloc_bhdr(mfp, page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
970 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
971 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
972 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
973 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
974
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
975 if ((hp = (bhdr_T *)alloc((unsigned)sizeof(bhdr_T))) != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
976 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
977 if ((hp->bh_data = (char_u *)alloc(mfp->mf_page_size * page_count))
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
978 == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
979 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
980 vim_free(hp); /* not enough memory */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
981 return NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
982 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
983 hp->bh_page_count = page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
984 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
985 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
986 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
987
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
988 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
989 * Free a block header and the block of memory for it
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
990 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
991 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
992 mf_free_bhdr(hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
993 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
994 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
995 vim_free(hp->bh_data);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
996 vim_free(hp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
997 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
998
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
999 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1000 * insert entry *hp in the free list
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1001 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1002 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1003 mf_ins_free(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1004 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1005 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1006 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1007 hp->bh_next = mfp->mf_free_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1008 mfp->mf_free_first = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1009 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1010
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1011 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1012 * remove the first entry from the free list and return a pointer to it
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1013 * Note: caller must check that mfp->mf_free_first is not NULL!
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1014 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1015 static bhdr_T *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1016 mf_rem_free(mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1017 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1018 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1019 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1020
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1021 hp = mfp->mf_free_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1022 mfp->mf_free_first = hp->bh_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1023 return hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1024 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1025
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1026 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1027 * read a block from disk
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1028 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1029 * Return FAIL for failure, OK otherwise
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1030 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1031 static int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1032 mf_read(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1033 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1034 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1035 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1036 off_t offset;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1037 unsigned page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1038 unsigned size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1039
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1040 if (mfp->mf_fd < 0) /* there is no file, can't read */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1041 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1042
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1043 page_size = mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1044 offset = (off_t)page_size * hp->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1045 size = page_size * hp->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1046 if (lseek(mfp->mf_fd, offset, SEEK_SET) != offset)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1047 {
1033
19ed3bfbe488 updated for version 7.0-159
vimboss
parents: 1030
diff changeset
1048 PERROR(_("E294: Seek error in swap file read"));
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1049 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1050 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1051 if ((unsigned)vim_read(mfp->mf_fd, hp->bh_data, size) != size)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1052 {
1033
19ed3bfbe488 updated for version 7.0-159
vimboss
parents: 1030
diff changeset
1053 PERROR(_("E295: Read error in swap file"));
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1054 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1055 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1056 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1057 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1058
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1059 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1060 * write a block to disk
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1061 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1062 * Return FAIL for failure, OK otherwise
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1063 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1064 static int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1065 mf_write(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1066 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1067 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1068 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1069 off_t offset; /* offset in the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1070 blocknr_T nr; /* block nr which is being written */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1071 bhdr_T *hp2;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1072 unsigned page_size; /* number of bytes in a page */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1073 unsigned page_count; /* number of pages written */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1074 unsigned size; /* number of bytes written */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1075
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1076 if (mfp->mf_fd < 0) /* there is no file, can't write */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1077 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1078
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1079 if (hp->bh_bnum < 0) /* must assign file block number */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1080 if (mf_trans_add(mfp, hp) == FAIL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1081 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1082
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1083 page_size = mfp->mf_page_size;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1084
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1085 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1086 * We don't want gaps in the file. Write the blocks in front of *hp
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1087 * to extend the file.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1088 * If block 'mf_infile_count' is not in the hash list, it has been
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1089 * freed. Fill the space in the file with data from the current block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1090 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1091 for (;;)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1092 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1093 nr = hp->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1094 if (nr > mfp->mf_infile_count) /* beyond end of file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1095 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1096 nr = mfp->mf_infile_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1097 hp2 = mf_find_hash(mfp, nr); /* NULL catched below */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1098 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1099 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1100 hp2 = hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1101
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1102 offset = (off_t)page_size * nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1103 if (lseek(mfp->mf_fd, offset, SEEK_SET) != offset)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1104 {
1033
19ed3bfbe488 updated for version 7.0-159
vimboss
parents: 1030
diff changeset
1105 PERROR(_("E296: Seek error in swap file write"));
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1106 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1107 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1108 if (hp2 == NULL) /* freed block, fill with dummy data */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1109 page_count = 1;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1110 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1111 page_count = hp2->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1112 size = page_size * page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1113 if ((unsigned)vim_write(mfp->mf_fd,
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1114 (hp2 == NULL ? hp : hp2)->bh_data, size) != size)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1115 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1116 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1117 * Avoid repeating the error message, this mostly happens when the
1226
a49d06539452 updated for version 7.1b
vimboss
parents: 1166
diff changeset
1118 * disk is full. We give the message again only after a successful
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1119 * write or when hitting a key. We keep on trying, in case some
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1120 * space becomes available.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1121 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1122 if (!did_swapwrite_msg)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1123 EMSG(_("E297: Write error in swap file"));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1124 did_swapwrite_msg = TRUE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1125 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1126 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1127 did_swapwrite_msg = FALSE;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1128 if (hp2 != NULL) /* written a non-dummy block */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1129 hp2->bh_flags &= ~BH_DIRTY;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1130 /* appended to the file */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1131 if (nr + (blocknr_T)page_count > mfp->mf_infile_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1132 mfp->mf_infile_count = nr + page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1133 if (nr == hp->bh_bnum) /* written the desired block */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1134 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1135 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1136 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1137 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1138
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1139 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1140 * Make block number for *hp positive and add it to the translation list
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1141 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1142 * Return FAIL for failure, OK otherwise
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1143 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1144 static int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1145 mf_trans_add(mfp, hp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1146 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1147 bhdr_T *hp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1148 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1149 bhdr_T *freep;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1150 blocknr_T new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1151 int hash;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1152 NR_TRANS *np;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1153 int page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1154
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1155 if (hp->bh_bnum >= 0) /* it's already positive */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1156 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1157
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1158 if ((np = (NR_TRANS *)alloc((unsigned)sizeof(NR_TRANS))) == NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1159 return FAIL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1160
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1161 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1162 * get a new number for the block.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1163 * If the first item in the free list has sufficient pages, use its number
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1164 * Otherwise use mf_blocknr_max.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1165 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1166 freep = mfp->mf_free_first;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1167 page_count = hp->bh_page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1168 if (freep != NULL && freep->bh_page_count >= page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1169 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1170 new_bnum = freep->bh_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1171 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1172 * If the page count of the free block was larger, recude it.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1173 * If the page count matches, remove the block from the free list
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1174 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1175 if (freep->bh_page_count > page_count)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1176 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1177 freep->bh_bnum += page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1178 freep->bh_page_count -= page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1179 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1180 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1181 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1182 freep = mf_rem_free(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1183 vim_free(freep);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1184 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1185 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1186 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1187 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1188 new_bnum = mfp->mf_blocknr_max;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1189 mfp->mf_blocknr_max += page_count;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1190 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1191
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1192 np->nt_old_bnum = hp->bh_bnum; /* adjust number */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1193 np->nt_new_bnum = new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1194
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1195 mf_rem_hash(mfp, hp); /* remove from old hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1196 hp->bh_bnum = new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1197 mf_ins_hash(mfp, hp); /* insert in new hash list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1198
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1199 hash = MEMHASH(np->nt_old_bnum); /* insert in trans list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1200 np->nt_next = mfp->mf_trans[hash];
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1201 mfp->mf_trans[hash] = np;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1202 if (np->nt_next != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1203 np->nt_next->nt_prev = np;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1204 np->nt_prev = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1205
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1206 return OK;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1207 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1208
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1209 /*
1226
a49d06539452 updated for version 7.1b
vimboss
parents: 1166
diff changeset
1210 * Lookup a translation from the trans lists and delete the entry
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1211 *
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1212 * Return the positive new number when found, the old number when not found
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1213 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1214 blocknr_T
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1215 mf_trans_del(mfp, old_nr)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1216 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1217 blocknr_T old_nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1218 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1219 int hash;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1220 NR_TRANS *np;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1221 blocknr_T new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1222
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1223 hash = MEMHASH(old_nr);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1224 for (np = mfp->mf_trans[hash]; np != NULL; np = np->nt_next)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1225 if (np->nt_old_bnum == old_nr)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1226 break;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1227 if (np == NULL) /* not found */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1228 return old_nr;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1229
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1230 mfp->mf_neg_count--;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1231 new_bnum = np->nt_new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1232 if (np->nt_prev != NULL) /* remove entry from the trans list */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1233 np->nt_prev->nt_next = np->nt_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1234 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1235 mfp->mf_trans[hash] = np->nt_next;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1236 if (np->nt_next != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1237 np->nt_next->nt_prev = np->nt_prev;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1238 vim_free(np);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1239
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1240 return new_bnum;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1241 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1242
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1243 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1244 * Set mfp->mf_ffname according to mfp->mf_fname and some other things.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1245 * Only called when creating or renaming the swapfile. Either way it's a new
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1246 * name so we must work out the full path name.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1247 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1248 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1249 mf_set_ffname(mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1250 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1251 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1252 mfp->mf_ffname = FullName_save(mfp->mf_fname, FALSE);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1253 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1254
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1255 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1256 * Make the name of the file used for the memfile a full path.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1257 * Used before doing a :cd
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1258 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1259 void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1260 mf_fullname(mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1261 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1262 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1263 if (mfp != NULL && mfp->mf_fname != NULL && mfp->mf_ffname != NULL)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1264 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1265 vim_free(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1266 mfp->mf_fname = mfp->mf_ffname;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1267 mfp->mf_ffname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1268 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1269 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1270
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1271 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1272 * return TRUE if there are any translations pending for 'mfp'
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1273 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1274 int
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1275 mf_need_trans(mfp)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1276 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1277 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1278 return (mfp->mf_fname != NULL && mfp->mf_neg_count > 0);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1279 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1280
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1281 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1282 * Open a swap file for a memfile.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1283 * The "fname" must be in allocated memory, and is consumed (also when an
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1284 * error occurs).
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1285 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1286 static void
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1287 mf_do_open(mfp, fname, flags)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1288 memfile_T *mfp;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1289 char_u *fname;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1290 int flags; /* flags for open() */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1291 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1292 #ifdef HAVE_LSTAT
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1293 struct stat sb;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1294 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1295
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1296 mfp->mf_fname = fname;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1297
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1298 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1299 * Get the full path name before the open, because this is
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1300 * not possible after the open on the Amiga.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1301 * fname cannot be NameBuff, because it must have been allocated.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1302 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1303 mf_set_ffname(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1304 #if defined(MSDOS) || defined(MSWIN) || defined(RISCOS)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1305 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1306 * A ":!cd e:xxx" may change the directory without us knowning, use the
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1307 * full pathname always. Careful: This frees fname!
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1308 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1309 mf_fullname(mfp);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1310 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1311
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1312 #ifdef HAVE_LSTAT
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1313 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1314 * Extra security check: When creating a swap file it really shouldn't
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1315 * exist yet. If there is a symbolic link, this is most likely an attack.
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1316 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1317 if ((flags & O_CREAT) && mch_lstat((char *)mfp->mf_fname, &sb) >= 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1318 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1319 mfp->mf_fd = -1;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1320 EMSG(_("E300: Swap file already exists (symlink attack?)"));
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1321 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1322 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1323 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1324 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1325 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1326 * try to open the file
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1327 */
557
862863033fdd updated for version 7.0158
vimboss
parents: 7
diff changeset
1328 flags |= O_EXTRA | O_NOFOLLOW;
7
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1329 #ifdef WIN32
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1330 /* Prevent handle inheritance that cause problems with Cscope
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1331 * (swap file may not be deleted if cscope connection was open after
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1332 * the file) */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1333 flags |= O_NOINHERIT;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1334 #endif
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1335 mfp->mf_fd = mch_open_rw((char *)mfp->mf_fname, flags);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1336 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1337
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1338 /*
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1339 * If the file cannot be opened, use memory only
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1340 */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1341 if (mfp->mf_fd < 0)
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1342 {
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1343 vim_free(mfp->mf_fname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1344 vim_free(mfp->mf_ffname);
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1345 mfp->mf_fname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1346 mfp->mf_ffname = NULL;
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1347 }
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1348 else
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1349 mch_hide(mfp->mf_fname); /* try setting the 'hidden' flag */
3fc0f57ecb91 updated for version 7.0001
vimboss
parents:
diff changeset
1350 }