-
Notifications
You must be signed in to change notification settings - Fork 21
/
threads.c
244 lines (196 loc) · 4.76 KB
/
threads.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
/*
* threads.c - Thread, mutex, and condition variable support. Wraps around
* pthreads or Windows native threads.
*/
/*
* Copyright 2016-2023 Eric Biggers
*
* This file is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option) any
* later version.
*
* This file is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this file; if not, see https://www.gnu.org/licenses/.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef _WIN32
# include "wimlib/win32_common.h"
#else
# include <errno.h>
# include <pthread.h>
#endif
#include "wimlib/assert.h"
#include "wimlib/error.h"
#include "wimlib/threads.h"
#include "wimlib/util.h"
#ifdef _WIN32
static WINAPI DWORD
win32_thrproc(LPVOID lpParameter)
{
struct thread *t = (struct thread *)lpParameter;
(*t->thrproc)(t->arg);
return 0;
}
bool thread_create(struct thread *t, void *(*thrproc)(void *), void *arg)
{
HANDLE h;
t->thrproc = thrproc;
t->arg = arg;
h = CreateThread(NULL, 0, win32_thrproc, (LPVOID)t, 0, NULL);
if (h == NULL) {
win32_error(GetLastError(), L"Failed to create thread");
return false;
}
t->win32_thread = (void *)h;
return true;
}
void thread_join(struct thread *t)
{
DWORD res = WaitForSingleObject((HANDLE)t->win32_thread, INFINITE);
wimlib_assert(res == WAIT_OBJECT_0);
}
bool mutex_init(struct mutex *m)
{
CRITICAL_SECTION *crit = MALLOC(sizeof(*crit));
if (!crit)
return false;
InitializeCriticalSection(crit);
m->win32_crit = crit;
return true;
}
void mutex_destroy(struct mutex *m)
{
DeleteCriticalSection(m->win32_crit);
FREE(m->win32_crit);
m->win32_crit = NULL;
}
void mutex_lock(struct mutex *m)
{
CRITICAL_SECTION *crit = m->win32_crit;
if (unlikely(!crit)) {
CRITICAL_SECTION *old;
crit = MALLOC(sizeof(*crit));
wimlib_assert(crit != NULL);
InitializeCriticalSection(crit);
old = InterlockedCompareExchangePointer(&m->win32_crit, crit,
NULL);
if (old) {
DeleteCriticalSection(crit);
FREE(crit);
crit = old;
}
}
EnterCriticalSection(crit);
}
void mutex_unlock(struct mutex *m)
{
LeaveCriticalSection(m->win32_crit);
}
bool condvar_init(struct condvar *c)
{
CONDITION_VARIABLE *cond = MALLOC(sizeof(*cond));
if (!cond)
return false;
InitializeConditionVariable(cond);
c->win32_cond = cond;
return true;
}
void condvar_destroy(struct condvar *c)
{
FREE(c->win32_cond);
c->win32_cond = NULL;
}
void condvar_wait(struct condvar *c, struct mutex *m)
{
BOOL ok = SleepConditionVariableCS(c->win32_cond, m->win32_crit,
INFINITE);
wimlib_assert(ok);
}
void condvar_signal(struct condvar *c)
{
WakeConditionVariable(c->win32_cond);
}
void condvar_broadcast(struct condvar *c)
{
WakeAllConditionVariable(c->win32_cond);
}
#else /* _WIN32 */
bool thread_create(struct thread *t, void *(*thrproc)(void *), void *arg)
{
int err = pthread_create(&t->pthread, NULL, thrproc, arg);
if (err) {
errno = err;
ERROR_WITH_ERRNO("Failed to create thread");
return false;
}
return true;
}
void thread_join(struct thread *t)
{
int err = pthread_join(t->pthread, NULL);
wimlib_assert(err == 0);
}
bool mutex_init(struct mutex *m)
{
int err = pthread_mutex_init(&m->pthread_mutex, NULL);
if (err) {
errno = err;
ERROR_WITH_ERRNO("Failed to initialize mutex");
return false;
}
return true;
}
void mutex_destroy(struct mutex *m)
{
int err = pthread_mutex_destroy(&m->pthread_mutex);
wimlib_assert(err == 0);
}
void mutex_lock(struct mutex *m)
{
int err = pthread_mutex_lock(&m->pthread_mutex);
wimlib_assert(err == 0);
}
void mutex_unlock(struct mutex *m)
{
int err = pthread_mutex_unlock(&m->pthread_mutex);
wimlib_assert(err == 0);
}
bool condvar_init(struct condvar *c)
{
int err = pthread_cond_init(&c->pthread_cond, NULL);
if (err) {
errno = err;
ERROR_WITH_ERRNO("Failed to initialize condition variable");
return false;
}
return true;
}
void condvar_destroy(struct condvar *c)
{
int err = pthread_cond_destroy(&c->pthread_cond);
wimlib_assert(err == 0);
}
void condvar_wait(struct condvar *c, struct mutex *m)
{
int err = pthread_cond_wait(&c->pthread_cond, &m->pthread_mutex);
wimlib_assert(err == 0);
}
void condvar_signal(struct condvar *c)
{
int err = pthread_cond_signal(&c->pthread_cond);
wimlib_assert(err == 0);
}
void condvar_broadcast(struct condvar *c)
{
int err = pthread_cond_broadcast(&c->pthread_cond);
wimlib_assert(err == 0);
}
#endif /* !_WIN32 */