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1 | /** |
2 | * Copyright (c) 2016 Tino Reichardt |
3 | * All rights reserved. |
4 | * |
5 | * You can contact the author at: |
6 | * - zstdmt source repository: https://github.com/mcmilk/zstdmt |
7 | * |
8 | * This source code is licensed under both the BSD-style license (found in the |
9 | * LICENSE file in the root directory of this source tree) and the GPLv2 (found |
10 | * in the COPYING file in the root directory of this source tree). |
11 | * You may select, at your option, one of the above-listed licenses. |
12 | */ |
13 | |
14 | /** |
15 | * This file will hold wrapper for systems, which do not support pthreads |
16 | */ |
17 | |
18 | #include "threading.h" |
19 | |
20 | /* create fake symbol to avoid empty translation unit warning */ |
21 | int g_ZSTD_threading_useless_symbol; |
22 | |
23 | #if defined(ZSTD_MULTITHREAD) && defined(_WIN32) |
24 | |
25 | /** |
26 | * Windows minimalist Pthread Wrapper |
27 | */ |
28 | |
29 | |
30 | /* === Dependencies === */ |
31 | #include <process.h> |
32 | #include <errno.h> |
33 | |
34 | |
35 | /* === Implementation === */ |
36 | |
37 | typedef struct { |
38 | void* (*start_routine)(void*); |
39 | void* arg; |
40 | int initialized; |
41 | ZSTD_pthread_cond_t initialized_cond; |
42 | ZSTD_pthread_mutex_t initialized_mutex; |
43 | } ZSTD_thread_params_t; |
44 | |
45 | static unsigned __stdcall worker(void *arg) |
46 | { |
47 | void* (*start_routine)(void*); |
48 | void* thread_arg; |
49 | |
50 | /* Initialized thread_arg and start_routine and signal main thread that we don't need it |
51 | * to wait any longer. |
52 | */ |
53 | { |
54 | ZSTD_thread_params_t* thread_param = (ZSTD_thread_params_t*)arg; |
55 | thread_arg = thread_param->arg; |
56 | start_routine = thread_param->start_routine; |
57 | |
58 | /* Signal main thread that we are running and do not depend on its memory anymore */ |
59 | ZSTD_pthread_mutex_lock(&thread_param->initialized_mutex); |
60 | thread_param->initialized = 1; |
61 | ZSTD_pthread_cond_signal(&thread_param->initialized_cond); |
62 | ZSTD_pthread_mutex_unlock(&thread_param->initialized_mutex); |
63 | } |
64 | |
65 | start_routine(thread_arg); |
66 | |
67 | return 0; |
68 | } |
69 | |
70 | int ZSTD_pthread_create(ZSTD_pthread_t* thread, const void* unused, |
71 | void* (*start_routine) (void*), void* arg) |
72 | { |
73 | ZSTD_thread_params_t thread_param; |
74 | (void)unused; |
75 | |
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76 | if (thread==NULL) return -1; |
77 | *thread = NULL; |
78 | |
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79 | thread_param.start_routine = start_routine; |
80 | thread_param.arg = arg; |
81 | thread_param.initialized = 0; |
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82 | |
83 | /* Setup thread initialization synchronization */ |
84 | if(ZSTD_pthread_cond_init(&thread_param.initialized_cond, NULL)) { |
85 | /* Should never happen on Windows */ |
86 | return -1; |
87 | } |
88 | if(ZSTD_pthread_mutex_init(&thread_param.initialized_mutex, NULL)) { |
89 | /* Should never happen on Windows */ |
90 | ZSTD_pthread_cond_destroy(&thread_param.initialized_cond); |
91 | return -1; |
92 | } |
93 | |
94 | /* Spawn thread */ |
95 | *thread = (HANDLE)_beginthreadex(NULL, 0, worker, &thread_param, 0, NULL); |
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96 | if (*thread==NULL) { |
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97 | ZSTD_pthread_mutex_destroy(&thread_param.initialized_mutex); |
98 | ZSTD_pthread_cond_destroy(&thread_param.initialized_cond); |
99 | return errno; |
100 | } |
101 | |
102 | /* Wait for thread to be initialized */ |
103 | ZSTD_pthread_mutex_lock(&thread_param.initialized_mutex); |
104 | while(!thread_param.initialized) { |
105 | ZSTD_pthread_cond_wait(&thread_param.initialized_cond, &thread_param.initialized_mutex); |
106 | } |
107 | ZSTD_pthread_mutex_unlock(&thread_param.initialized_mutex); |
108 | ZSTD_pthread_mutex_destroy(&thread_param.initialized_mutex); |
109 | ZSTD_pthread_cond_destroy(&thread_param.initialized_cond); |
110 | |
111 | return 0; |
112 | } |
113 | |
114 | int ZSTD_pthread_join(ZSTD_pthread_t thread) |
115 | { |
116 | DWORD result; |
117 | |
118 | if (!thread) return 0; |
119 | |
120 | result = WaitForSingleObject(thread, INFINITE); |
121 | CloseHandle(thread); |
122 | |
123 | switch (result) { |
124 | case WAIT_OBJECT_0: |
125 | return 0; |
126 | case WAIT_ABANDONED: |
127 | return EINVAL; |
128 | default: |
129 | return GetLastError(); |
130 | } |
131 | } |
132 | |
133 | #endif /* ZSTD_MULTITHREAD */ |
134 | |
135 | #if defined(ZSTD_MULTITHREAD) && DEBUGLEVEL >= 1 && !defined(_WIN32) |
136 | |
137 | #define ZSTD_DEPS_NEED_MALLOC |
138 | #include "zstd_deps.h" |
139 | |
140 | int ZSTD_pthread_mutex_init(ZSTD_pthread_mutex_t* mutex, pthread_mutexattr_t const* attr) |
141 | { |
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142 | assert(mutex != NULL); |
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143 | *mutex = (pthread_mutex_t*)ZSTD_malloc(sizeof(pthread_mutex_t)); |
144 | if (!*mutex) |
145 | return 1; |
146 | return pthread_mutex_init(*mutex, attr); |
147 | } |
148 | |
149 | int ZSTD_pthread_mutex_destroy(ZSTD_pthread_mutex_t* mutex) |
150 | { |
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151 | assert(mutex != NULL); |
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152 | if (!*mutex) |
153 | return 0; |
154 | { |
155 | int const ret = pthread_mutex_destroy(*mutex); |
156 | ZSTD_free(*mutex); |
157 | return ret; |
158 | } |
159 | } |
160 | |
161 | int ZSTD_pthread_cond_init(ZSTD_pthread_cond_t* cond, pthread_condattr_t const* attr) |
162 | { |
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163 | assert(cond != NULL); |
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164 | *cond = (pthread_cond_t*)ZSTD_malloc(sizeof(pthread_cond_t)); |
165 | if (!*cond) |
166 | return 1; |
167 | return pthread_cond_init(*cond, attr); |
168 | } |
169 | |
170 | int ZSTD_pthread_cond_destroy(ZSTD_pthread_cond_t* cond) |
171 | { |
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172 | assert(cond != NULL); |
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173 | if (!*cond) |
174 | return 0; |
175 | { |
176 | int const ret = pthread_cond_destroy(*cond); |
177 | ZSTD_free(*cond); |
178 | return ret; |
179 | } |
180 | } |
181 | |
182 | #endif |