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annotate contrib/python-zstandard/zstd/common/threading.c @ 48674:f7086f6173f8 stable

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dirstate-v2: rename the configuration to enable the format The rename of the old experimental name was overlooked before the 6.0 release. We rename everything to use the new name (and keep the released name as an alias for compatibility). Differential Revision: https://phab.mercurial-scm.org/D12129
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 01 Feb 2022 16:36:20 +0100
parents de7838053207
children
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1 /**
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2 * Copyright (c) 2016 Tino Reichardt
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3 * All rights reserved.
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4 *
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5 * This source code is licensed under both the BSD-style license (found in the
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6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
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7 * in the COPYING file in the root directory of this source tree).
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8 *
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9 * You can contact the author at:
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10 * - zstdmt source repository: https://github.com/mcmilk/zstdmt
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11 */
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12
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13 /**
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14 * This file will hold wrapper for systems, which do not support pthreads
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15 */
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16
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17 #include "threading.h"
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18
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19 /* create fake symbol to avoid empty translation unit warning */
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20 int g_ZSTD_threading_useless_symbol;
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21
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22 #if defined(ZSTD_MULTITHREAD) && defined(_WIN32)
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23
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24 /**
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25 * Windows minimalist Pthread Wrapper, based on :
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26 * http://www.cse.wustl.edu/~schmidt/win32-cv-1.html
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27 */
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28
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29
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30 /* === Dependencies === */
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31 #include <process.h>
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32 #include <errno.h>
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33
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34
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35 /* === Implementation === */
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36
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37 static unsigned __stdcall worker(void *arg)
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38 {
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39 ZSTD_pthread_t* const thread = (ZSTD_pthread_t*) arg;
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40 thread->arg = thread->start_routine(thread->arg);
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41 return 0;
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42 }
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43
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44 int ZSTD_pthread_create(ZSTD_pthread_t* thread, const void* unused,
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45 void* (*start_routine) (void*), void* arg)
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46 {
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47 (void)unused;
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48 thread->arg = arg;
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49 thread->start_routine = start_routine;
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50 thread->handle = (HANDLE) _beginthreadex(NULL, 0, worker, thread, 0, NULL);
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51
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52 if (!thread->handle)
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53 return errno;
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54 else
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55 return 0;
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56 }
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57
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58 int ZSTD_pthread_join(ZSTD_pthread_t thread, void **value_ptr)
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59 {
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60 DWORD result;
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61
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62 if (!thread.handle) return 0;
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63
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64 result = WaitForSingleObject(thread.handle, INFINITE);
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65 switch (result) {
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66 case WAIT_OBJECT_0:
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67 if (value_ptr) *value_ptr = thread.arg;
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68 return 0;
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69 case WAIT_ABANDONED:
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70 return EINVAL;
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71 default:
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72 return GetLastError();
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73 }
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74 }
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75
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76 #endif /* ZSTD_MULTITHREAD */
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77
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78 #if defined(ZSTD_MULTITHREAD) && DEBUGLEVEL >= 1 && !defined(_WIN32)
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79
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80 #include <stdlib.h>
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81
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82 int ZSTD_pthread_mutex_init(ZSTD_pthread_mutex_t* mutex, pthread_mutexattr_t const* attr)
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83 {
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84 *mutex = (pthread_mutex_t*)malloc(sizeof(pthread_mutex_t));
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85 if (!*mutex)
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86 return 1;
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87 return pthread_mutex_init(*mutex, attr);
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88 }
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89
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90 int ZSTD_pthread_mutex_destroy(ZSTD_pthread_mutex_t* mutex)
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91 {
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92 if (!*mutex)
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93 return 0;
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94 {
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95 int const ret = pthread_mutex_destroy(*mutex);
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96 free(*mutex);
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97 return ret;
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98 }
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99 }
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100
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101 int ZSTD_pthread_cond_init(ZSTD_pthread_cond_t* cond, pthread_condattr_t const* attr)
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102 {
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103 *cond = (pthread_cond_t*)malloc(sizeof(pthread_cond_t));
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104 if (!*cond)
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105 return 1;
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106 return pthread_cond_init(*cond, attr);
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107 }
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108
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109 int ZSTD_pthread_cond_destroy(ZSTD_pthread_cond_t* cond)
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110 {
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111 if (!*cond)
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112 return 0;
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113 {
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114 int const ret = pthread_cond_destroy(*cond);
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115 free(*cond);
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116 return ret;
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117 }
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118 }
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119
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120 #endif