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annotate src/channel.c @ 7743:6069f43cea4e v7.4.1169

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commit https://github.com/vim/vim/commit/e0874f8cbcddfcf9965a85ba35199964efb1d01a Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 24 20:36:41 2016 +0100 patch 7.4.1169 Problem: The socket I/O is intertwined with the netbeans code. Solution: Start refactoring the netbeans communication to split off the socket I/O. Add the +channel feature.
author Christian Brabandt <cb@256bit.org>
date Sun, 24 Jan 2016 20:45:05 +0100
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children 42c1a4e63d12
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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 */
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9 /*
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10 * Implements communication through a socket or any file handle.
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11 */
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13 #include "vim.h"
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15 #if defined(FEAT_CHANNEL) || defined(PROTO)
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17 typedef struct {
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18 sock_T ch_fd;
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19 int ch_idx;
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20 } channel_T;
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22 static channel_T *channels = NULL;
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23 static int channel_count = 0;
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25 /*
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26 * Add a new channel slot, return the index.
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27 * Returns -1 if out of space.
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28 */
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29 static int
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30 add_channel(void)
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31 {
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32 int idx;
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33 channel_T *new_channels;
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35 if (channels != NULL)
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36 for (idx = 0; idx < channel_count; ++idx)
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37 if (channels[idx].ch_fd < 0)
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38 /* re-use a closed channel slot */
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39 return idx;
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40 if (channel_count == MAX_OPEN_CHANNELS)
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41 return -1;
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42 new_channels = (channel_T *)alloc(sizeof(channel_T) * channel_count + 1);
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43 if (new_channels == NULL)
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44 return -1;
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45 if (channels != NULL)
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46 mch_memmove(new_channels, channels, sizeof(channel_T) * channel_count);
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47 channels = new_channels;
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48 channels[channel_count].ch_fd = (sock_T)-1;
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50 return channel_count++;
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51 }
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53 #if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
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54 static int netbeans_channel = -1;
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56 /*
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57 * Add the netbeans socket to the channels.
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58 * Return the channel index.
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59 */
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60 int
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61 channel_add_netbeans(sock_T fd)
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62 {
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63 int idx = add_channel();
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64
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65 if (idx >= 0)
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66 {
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67 channels[idx].ch_fd = fd;
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68 netbeans_channel = idx;
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69 }
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70 return idx;
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71 }
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72
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73 void
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74 channel_remove_netbeans()
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75 {
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76 channels[netbeans_channel].ch_fd = (sock_T)-1;
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77 netbeans_channel = -1;
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78 }
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79 #endif
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81 static void
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82 channel_read(int idx)
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83 {
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84 # ifdef FEAT_NETBEANS_INTG
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85 if (idx == netbeans_channel)
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86 netbeans_read();
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87 else
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88 # endif
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89 {
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90 ; /* TODO: read */
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91 }
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92 }
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93
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94 #if (defined(UNIX) && !defined(HAVE_SELECT)) || defined(PROTO)
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95 /*
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96 * Add open channels to the poll struct.
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97 * Return the adjusted struct index.
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98 * The type of "fds" is hidden to avoid problems with the function proto.
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99 */
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100 int
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101 channel_poll_setup(int nfd_in, void *fds_in)
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102 {
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103 int nfd = nfd_in;
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104 int i;
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105 struct pollfd *fds = fds_in;
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106
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107 for (i = 0; i < channel_count; ++i)
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108 if (channels[i].ch_fd >= 0)
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109 {
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110 channels[i].ch_idx = nfd;
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111 fds[nfd].fd = channels[i].ch_fd;
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112 fds[nfd].events = POLLIN;
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113 nfd++;
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114 }
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115 else
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116 channels[i].ch_idx = -1;
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117
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118 return nfd;
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119 }
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120
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121 /*
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122 * The type of "fds" is hidden to avoid problems with the function proto.
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123 */
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124 int
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125 channel_poll_check(int ret_in, void *fds_in)
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126 {
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127 int ret = ret_in;
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128 int i;
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129 struct pollfd *fds = fds_in;
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130
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131 for (i = 0; i < channel_count; ++i)
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132 if (ret > 0 && channels[i].ch_idx != -1
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133 && fds[channels[i].ch_idx].revents & POLLIN)
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134 {
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135 channel_read(i);
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136 --ret;
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137 }
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138
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139 return ret;
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140 }
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141 #endif /* UNIX && !HAVE_SELECT */
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142
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143 #if (defined(UNIX) && defined(HAVE_SELECT)) || defined(PROTO)
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144 /*
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145 * The type of "rfds" is hidden to avoid problems with the function proto.
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146 */
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147 int
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148 channel_select_setup(int maxfd_in, void *rfds_in)
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149 {
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150 int maxfd = maxfd_in;
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151 int i;
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152 fd_set *rfds = rfds_in;
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153
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154 for (i = 0; i < channel_count; ++i)
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155 if (channels[i].ch_fd >= 0)
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156 {
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157 FD_SET(channels[i].ch_fd, rfds);
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158 if (maxfd < channels[i].ch_fd)
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159 maxfd = channels[i].ch_fd;
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160 }
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161
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162 return maxfd;
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163 }
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164
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165 /*
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166 * The type of "rfds" is hidden to avoid problems with the function proto.
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167 */
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168 int
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169 channel_select_check(int ret_in, void *rfds_in)
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170 {
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171 int ret = ret_in;
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172 int i;
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173 fd_set *rfds = rfds_in;
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174
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175 for (i = 0; i < channel_count; ++i)
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176 if (ret > 0 && channels[i].ch_fd >= 0
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177 && FD_ISSET(channels[i].ch_fd, rfds))
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178 {
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179 channel_read(i);
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180 --ret;
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181 }
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182
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183 return ret;
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184 }
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185 #endif /* UNIX && HAVE_SELECT */
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186
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187 #endif /* FEAT_CHANNEL */