Commit | Line | Data |
---|---|---|
07739b57 JA |
1 | #include <stdio.h> |
2 | #include <string.h> | |
3 | #include <unistd.h> | |
4 | #include <stdlib.h> | |
5 | #include <fcntl.h> | |
656b1393 | 6 | #include <time.h> |
ef635057 | 7 | #include <errno.h> |
07739b57 JA |
8 | #include <pthread.h> |
9 | #include <sys/mman.h> | |
8b4e954c | 10 | #include <assert.h> |
07739b57 | 11 | |
b4c1fb36 | 12 | #include "fio.h" |
4fa6d0f8 | 13 | #include "log.h" |
07739b57 | 14 | #include "mutex.h" |
4d4e80f2 | 15 | #include "arch/arch.h" |
3c2d93ed | 16 | #include "os/os.h" |
3b2e1464 | 17 | #include "helpers.h" |
ef3c94b6 | 18 | #include "fio_time.h" |
ef635057 | 19 | #include "gettime.h" |
07739b57 | 20 | |
f5a42524 | 21 | void __fio_mutex_remove(struct fio_mutex *mutex) |
07739b57 | 22 | { |
8f801ad5 | 23 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
58a157d4 | 24 | pthread_cond_destroy(&mutex->cond); |
f5a42524 JA |
25 | } |
26 | ||
27 | void fio_mutex_remove(struct fio_mutex *mutex) | |
28 | { | |
29 | __fio_mutex_remove(mutex); | |
5921e80c | 30 | munmap((void *) mutex, sizeof(*mutex)); |
07739b57 JA |
31 | } |
32 | ||
34febb23 | 33 | int cond_init_pshared(pthread_cond_t *cond) |
07739b57 | 34 | { |
34febb23 | 35 | pthread_condattr_t cattr; |
e721c57f | 36 | int ret; |
07739b57 | 37 | |
34febb23 JA |
38 | ret = pthread_condattr_init(&cattr); |
39 | if (ret) { | |
40 | log_err("pthread_condattr_init: %s\n", strerror(ret)); | |
41 | return ret; | |
42 | } | |
43 | ||
44 | #ifdef FIO_HAVE_PSHARED_MUTEX | |
45 | ret = pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED); | |
46 | if (ret) { | |
47 | log_err("pthread_condattr_setpshared: %s\n", strerror(ret)); | |
48 | return ret; | |
49 | } | |
50 | #endif | |
51 | ret = pthread_cond_init(cond, &cattr); | |
52 | if (ret) { | |
53 | log_err("pthread_cond_init: %s\n", strerror(ret)); | |
54 | return ret; | |
55 | } | |
56 | ||
57 | return 0; | |
58 | } | |
07739b57 | 59 | |
34febb23 JA |
60 | int mutex_init_pshared(pthread_mutex_t *mutex) |
61 | { | |
62 | pthread_mutexattr_t mattr; | |
63 | int ret; | |
64 | ||
65 | ret = pthread_mutexattr_init(&mattr); | |
4fa6d0f8 JA |
66 | if (ret) { |
67 | log_err("pthread_mutexattr_init: %s\n", strerror(ret)); | |
72242057 | 68 | return ret; |
07739b57 | 69 | } |
e721c57f JA |
70 | |
71 | /* | |
72 | * Not all platforms support process shared mutexes (FreeBSD) | |
73 | */ | |
7452440e | 74 | #ifdef FIO_HAVE_PSHARED_MUTEX |
34febb23 | 75 | ret = pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED); |
4fa6d0f8 JA |
76 | if (ret) { |
77 | log_err("pthread_mutexattr_setpshared: %s\n", strerror(ret)); | |
72242057 | 78 | return ret; |
07739b57 | 79 | } |
7452440e | 80 | #endif |
34febb23 | 81 | ret = pthread_mutex_init(mutex, &mattr); |
4fa6d0f8 JA |
82 | if (ret) { |
83 | log_err("pthread_mutex_init: %s\n", strerror(ret)); | |
72242057 | 84 | return ret; |
07739b57 JA |
85 | } |
86 | ||
34febb23 JA |
87 | return 0; |
88 | } | |
89 | ||
90 | int mutex_cond_init_pshared(pthread_mutex_t *mutex, pthread_cond_t *cond) | |
91 | { | |
92 | int ret; | |
93 | ||
94 | ret = mutex_init_pshared(mutex); | |
95 | if (ret) | |
96 | return ret; | |
97 | ||
98 | ret = cond_init_pshared(cond); | |
99 | if (ret) | |
100 | return ret; | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | int __fio_mutex_init(struct fio_mutex *mutex, int value) | |
106 | { | |
107 | int ret; | |
108 | ||
109 | mutex->value = value; | |
110 | mutex->magic = FIO_MUTEX_MAGIC; | |
111 | ||
112 | ret = mutex_cond_init_pshared(&mutex->lock, &mutex->cond); | |
113 | if (ret) | |
114 | return ret; | |
115 | ||
72242057 JA |
116 | return 0; |
117 | } | |
118 | ||
119 | struct fio_mutex *fio_mutex_init(int value) | |
120 | { | |
121 | struct fio_mutex *mutex = NULL; | |
122 | ||
123 | mutex = (void *) mmap(NULL, sizeof(struct fio_mutex), | |
124 | PROT_READ | PROT_WRITE, | |
125 | OS_MAP_ANON | MAP_SHARED, -1, 0); | |
126 | if (mutex == MAP_FAILED) { | |
127 | perror("mmap mutex"); | |
128 | return NULL; | |
129 | } | |
03e20d68 | 130 | |
72242057 JA |
131 | if (!__fio_mutex_init(mutex, value)) |
132 | return mutex; | |
f7c9e00e | 133 | |
72242057 | 134 | fio_mutex_remove(mutex); |
07739b57 JA |
135 | return NULL; |
136 | } | |
137 | ||
09400a60 | 138 | static bool mutex_timed_out(struct timeval *t, unsigned int msecs) |
ef635057 | 139 | { |
09400a60 JA |
140 | struct timeval now; |
141 | ||
142 | gettimeofday(&now, NULL); | |
143 | return mtime_since(t, &now) >= msecs; | |
ef635057 JA |
144 | } |
145 | ||
09400a60 | 146 | int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int msecs) |
656b1393 | 147 | { |
ef635057 | 148 | struct timeval tv_s; |
656b1393 JA |
149 | struct timespec t; |
150 | int ret = 0; | |
151 | ||
8f801ad5 | 152 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 153 | |
b11e4ccf | 154 | gettimeofday(&tv_s, NULL); |
09400a60 | 155 | t.tv_sec = tv_s.tv_sec; |
b11e4ccf | 156 | t.tv_nsec = tv_s.tv_usec * 1000; |
656b1393 | 157 | |
09400a60 JA |
158 | t.tv_sec += msecs / 1000; |
159 | t.tv_nsec += ((msecs * 1000000) % 1000000000); | |
160 | if (t.tv_nsec >= 1000000000) { | |
161 | t.tv_nsec -= 1000000000; | |
162 | t.tv_sec++; | |
163 | } | |
164 | ||
656b1393 JA |
165 | pthread_mutex_lock(&mutex->lock); |
166 | ||
09400a60 | 167 | mutex->waiters++; |
656b1393 | 168 | while (!mutex->value && !ret) { |
ef635057 JA |
169 | /* |
170 | * Some platforms (FreeBSD 9?) seems to return timed out | |
171 | * way too early, double check. | |
172 | */ | |
656b1393 | 173 | ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t); |
09400a60 | 174 | if (ret == ETIMEDOUT && !mutex_timed_out(&tv_s, msecs)) |
ef635057 | 175 | ret = 0; |
656b1393 | 176 | } |
09400a60 | 177 | mutex->waiters--; |
656b1393 JA |
178 | |
179 | if (!ret) { | |
180 | mutex->value--; | |
181 | pthread_mutex_unlock(&mutex->lock); | |
42e833fa | 182 | return 0; |
656b1393 JA |
183 | } |
184 | ||
09400a60 | 185 | pthread_mutex_unlock(&mutex->lock); |
656b1393 JA |
186 | return ret; |
187 | } | |
188 | ||
66608372 | 189 | bool fio_mutex_down_trylock(struct fio_mutex *mutex) |
72242057 | 190 | { |
66608372 | 191 | bool ret = true; |
72242057 JA |
192 | |
193 | assert(mutex->magic == FIO_MUTEX_MAGIC); | |
194 | ||
195 | pthread_mutex_lock(&mutex->lock); | |
196 | if (mutex->value) { | |
197 | mutex->value--; | |
66608372 | 198 | ret = false; |
72242057 JA |
199 | } |
200 | pthread_mutex_unlock(&mutex->lock); | |
201 | ||
202 | return ret; | |
203 | } | |
204 | ||
cdd18ad8 | 205 | void fio_mutex_down(struct fio_mutex *mutex) |
07739b57 | 206 | { |
8f801ad5 | 207 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 208 | |
cdd18ad8 | 209 | pthread_mutex_lock(&mutex->lock); |
4d4e80f2 JA |
210 | |
211 | while (!mutex->value) { | |
212 | mutex->waiters++; | |
cdd18ad8 | 213 | pthread_cond_wait(&mutex->cond, &mutex->lock); |
4d4e80f2 JA |
214 | mutex->waiters--; |
215 | } | |
216 | ||
cdd18ad8 JA |
217 | mutex->value--; |
218 | pthread_mutex_unlock(&mutex->lock); | |
07739b57 JA |
219 | } |
220 | ||
cdd18ad8 | 221 | void fio_mutex_up(struct fio_mutex *mutex) |
07739b57 | 222 | { |
6899b6cb JA |
223 | int do_wake = 0; |
224 | ||
8f801ad5 | 225 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 226 | |
cdd18ad8 | 227 | pthread_mutex_lock(&mutex->lock); |
4d4e80f2 JA |
228 | read_barrier(); |
229 | if (!mutex->value && mutex->waiters) | |
6899b6cb | 230 | do_wake = 1; |
cdd18ad8 JA |
231 | mutex->value++; |
232 | pthread_mutex_unlock(&mutex->lock); | |
6899b6cb JA |
233 | |
234 | if (do_wake) | |
235 | pthread_cond_signal(&mutex->cond); | |
07739b57 | 236 | } |
64d4d313 | 237 | |
d7df1d13 | 238 | void fio_rwlock_write(struct fio_rwlock *lock) |
64d4d313 | 239 | { |
8f801ad5 | 240 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 241 | pthread_rwlock_wrlock(&lock->lock); |
64d4d313 JA |
242 | } |
243 | ||
d7df1d13 | 244 | void fio_rwlock_read(struct fio_rwlock *lock) |
64d4d313 | 245 | { |
8f801ad5 | 246 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 JA |
247 | pthread_rwlock_rdlock(&lock->lock); |
248 | } | |
4d4e80f2 | 249 | |
d7df1d13 JA |
250 | void fio_rwlock_unlock(struct fio_rwlock *lock) |
251 | { | |
8f801ad5 | 252 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 253 | pthread_rwlock_unlock(&lock->lock); |
64d4d313 JA |
254 | } |
255 | ||
d7df1d13 | 256 | void fio_rwlock_remove(struct fio_rwlock *lock) |
64d4d313 | 257 | { |
8f801ad5 | 258 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 259 | munmap((void *) lock, sizeof(*lock)); |
64d4d313 JA |
260 | } |
261 | ||
d7df1d13 | 262 | struct fio_rwlock *fio_rwlock_init(void) |
64d4d313 | 263 | { |
d7df1d13 | 264 | struct fio_rwlock *lock; |
33980f5d | 265 | pthread_rwlockattr_t attr; |
d7df1d13 JA |
266 | int ret; |
267 | ||
268 | lock = (void *) mmap(NULL, sizeof(struct fio_rwlock), | |
269 | PROT_READ | PROT_WRITE, | |
270 | OS_MAP_ANON | MAP_SHARED, -1, 0); | |
271 | if (lock == MAP_FAILED) { | |
272 | perror("mmap rwlock"); | |
273 | lock = NULL; | |
274 | goto err; | |
275 | } | |
276 | ||
8b4e954c JA |
277 | lock->magic = FIO_RWLOCK_MAGIC; |
278 | ||
33980f5d | 279 | ret = pthread_rwlockattr_init(&attr); |
d7df1d13 | 280 | if (ret) { |
cdb57fe2 | 281 | log_err("pthread_rwlockattr_init: %s\n", strerror(ret)); |
d7df1d13 JA |
282 | goto err; |
283 | } | |
33980f5d SL |
284 | #ifdef FIO_HAVE_PSHARED_MUTEX |
285 | ret = pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED); | |
286 | if (ret) { | |
cdb57fe2 | 287 | log_err("pthread_rwlockattr_setpshared: %s\n", strerror(ret)); |
33980f5d SL |
288 | goto destroy_attr; |
289 | } | |
33980f5d SL |
290 | |
291 | ret = pthread_rwlock_init(&lock->lock, &attr); | |
09f17d62 BC |
292 | #else |
293 | ret = pthread_rwlock_init(&lock->lock, NULL); | |
294 | #endif | |
295 | ||
33980f5d SL |
296 | if (ret) { |
297 | log_err("pthread_rwlock_init: %s\n", strerror(ret)); | |
298 | goto destroy_attr; | |
299 | } | |
300 | ||
301 | pthread_rwlockattr_destroy(&attr); | |
d7df1d13 JA |
302 | |
303 | return lock; | |
33980f5d SL |
304 | destroy_attr: |
305 | pthread_rwlockattr_destroy(&attr); | |
d7df1d13 JA |
306 | err: |
307 | if (lock) | |
308 | fio_rwlock_remove(lock); | |
309 | return NULL; | |
64d4d313 | 310 | } |