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annotate src/testdir/thread_util.py @ 29290:dc4de65a7fb7

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Update runtime files Commit: https://github.com/vim/vim/commit/8a3b805c6c9cae341d560df9c3567ebbe42a7404 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 26 12:21:15 2022 +0100 Update runtime files
author Bram Moolenaar <Bram@vim.org>
date Sun, 26 Jun 2022 13:30:04 +0200
parents 06e3c6bac36d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import platform
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2
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3 if platform.system() == 'Darwin':
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4 from ctypes import (
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5 CDLL,
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6 POINTER,
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7 Structure,
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8 byref,
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9 c_int,
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10 c_uint,
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11 c_uint32,
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12 c_void_p,
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13 sizeof
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14 )
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15 from ctypes.util import find_library
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16
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17 class ThreadTimeConstraintPolicy(Structure):
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18 _fields_ = [
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19 ("period", c_uint32),
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20 ("computation", c_uint32),
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21 ("constraint", c_uint32),
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22 ("preemptible", c_uint)
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23 ]
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24
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25 _libc = CDLL(find_library('c'))
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26
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27 THREAD_TIME_CONSTRAINT_POLICY = c_uint(2)
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28
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29 THREAD_TIME_CONSTRAINT_POLICY_COUNT = c_uint(
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30 int(sizeof(ThreadTimeConstraintPolicy) / sizeof(c_int)))
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31
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32 _libc.pthread_self.restype = c_void_p
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33
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34 _libc.pthread_mach_thread_np.restype = c_uint
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35 _libc.pthread_mach_thread_np.argtypes = [c_void_p]
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36
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37 _libc.thread_policy_get.restype = c_int
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38 _libc.thread_policy_get.argtypes = [
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39 c_uint,
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40 c_uint,
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41 c_void_p,
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42 POINTER(c_uint),
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43 POINTER(c_uint)
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44 ]
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45
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46 _libc.thread_policy_set.restype = c_int
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47 _libc.thread_policy_set.argtypes = [
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48 c_uint,
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49 c_uint,
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50 c_void_p,
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51 c_uint
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52 ]
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53
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54 def _mach_thread_self():
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55 return _libc.pthread_mach_thread_np(_libc.pthread_self())
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56
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57 def _get_time_constraint_policy(default=False):
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58 thread = _mach_thread_self()
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59 policy_info = ThreadTimeConstraintPolicy()
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60 policy_infoCnt = THREAD_TIME_CONSTRAINT_POLICY_COUNT
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61 get_default = c_uint(default)
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62
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63 kret = _libc.thread_policy_get(
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64 thread,
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65 THREAD_TIME_CONSTRAINT_POLICY,
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66 byref(policy_info),
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67 byref(policy_infoCnt),
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68 byref(get_default))
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69 if kret != 0:
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70 return None
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71 return policy_info
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72
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73 def _set_time_constraint_policy(policy_info):
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74 thread = _mach_thread_self()
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75 policy_infoCnt = THREAD_TIME_CONSTRAINT_POLICY_COUNT
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76
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77 kret = _libc.thread_policy_set(
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78 thread,
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79 THREAD_TIME_CONSTRAINT_POLICY,
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80 byref(policy_info),
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81 policy_infoCnt)
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82 if kret != 0:
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83 raise OSError(kret)
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84
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85 def set_high_priority():
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86 policy_info = _get_time_constraint_policy(default=True)
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87 if not policy_info:
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88 return
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89 policy_info.preemptible = c_uint(False)
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90 _set_time_constraint_policy(policy_info)