15 #include "arch/arch.h"
21 void __fio_mutex_remove(struct fio_mutex *mutex)
23 assert(mutex->magic == FIO_MUTEX_MAGIC);
24 pthread_cond_destroy(&mutex->cond);
27 void fio_mutex_remove(struct fio_mutex *mutex)
29 __fio_mutex_remove(mutex);
30 munmap((void *) mutex, sizeof(*mutex));
33 int __fio_mutex_init(struct fio_mutex *mutex, int value)
35 pthread_mutexattr_t attr;
36 pthread_condattr_t cond;
40 mutex->magic = FIO_MUTEX_MAGIC;
42 ret = pthread_mutexattr_init(&attr);
44 log_err("pthread_mutexattr_init: %s\n", strerror(ret));
49 * Not all platforms support process shared mutexes (FreeBSD)
51 #ifdef FIO_HAVE_PSHARED_MUTEX
52 ret = pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
54 log_err("pthread_mutexattr_setpshared: %s\n", strerror(ret));
59 pthread_condattr_init(&cond);
60 #ifdef FIO_HAVE_PSHARED_MUTEX
61 pthread_condattr_setpshared(&cond, PTHREAD_PROCESS_SHARED);
63 pthread_cond_init(&mutex->cond, &cond);
65 ret = pthread_mutex_init(&mutex->lock, &attr);
67 log_err("pthread_mutex_init: %s\n", strerror(ret));
71 pthread_condattr_destroy(&cond);
72 pthread_mutexattr_destroy(&attr);
76 struct fio_mutex *fio_mutex_init(int value)
78 struct fio_mutex *mutex = NULL;
80 mutex = (void *) mmap(NULL, sizeof(struct fio_mutex),
81 PROT_READ | PROT_WRITE,
82 OS_MAP_ANON | MAP_SHARED, -1, 0);
83 if (mutex == MAP_FAILED) {
88 if (!__fio_mutex_init(mutex, value))
91 fio_mutex_remove(mutex);
95 static int mutex_timed_out(struct timeval *t, unsigned int seconds)
97 return mtime_since_now(t) >= seconds * 1000;
100 int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int seconds)
106 assert(mutex->magic == FIO_MUTEX_MAGIC);
108 gettimeofday(&tv_s, NULL);
109 t.tv_sec = tv_s.tv_sec + seconds;
110 t.tv_nsec = tv_s.tv_usec * 1000;
112 pthread_mutex_lock(&mutex->lock);
114 while (!mutex->value && !ret) {
118 * Some platforms (FreeBSD 9?) seems to return timed out
119 * way too early, double check.
121 ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t);
122 if (ret == ETIMEDOUT && !mutex_timed_out(&tv_s, seconds))
130 pthread_mutex_unlock(&mutex->lock);
136 int fio_mutex_down_trylock(struct fio_mutex *mutex)
140 assert(mutex->magic == FIO_MUTEX_MAGIC);
142 pthread_mutex_lock(&mutex->lock);
147 pthread_mutex_unlock(&mutex->lock);
152 void fio_mutex_down(struct fio_mutex *mutex)
154 assert(mutex->magic == FIO_MUTEX_MAGIC);
156 pthread_mutex_lock(&mutex->lock);
158 while (!mutex->value) {
160 pthread_cond_wait(&mutex->cond, &mutex->lock);
165 pthread_mutex_unlock(&mutex->lock);
168 void fio_mutex_up(struct fio_mutex *mutex)
172 assert(mutex->magic == FIO_MUTEX_MAGIC);
174 pthread_mutex_lock(&mutex->lock);
176 if (!mutex->value && mutex->waiters)
179 pthread_mutex_unlock(&mutex->lock);
182 pthread_cond_signal(&mutex->cond);
185 void fio_rwlock_write(struct fio_rwlock *lock)
187 assert(lock->magic == FIO_RWLOCK_MAGIC);
188 pthread_rwlock_wrlock(&lock->lock);
191 void fio_rwlock_read(struct fio_rwlock *lock)
193 assert(lock->magic == FIO_RWLOCK_MAGIC);
194 pthread_rwlock_rdlock(&lock->lock);
197 void fio_rwlock_unlock(struct fio_rwlock *lock)
199 assert(lock->magic == FIO_RWLOCK_MAGIC);
200 pthread_rwlock_unlock(&lock->lock);
203 void fio_rwlock_remove(struct fio_rwlock *lock)
205 assert(lock->magic == FIO_RWLOCK_MAGIC);
206 munmap((void *) lock, sizeof(*lock));
209 struct fio_rwlock *fio_rwlock_init(void)
211 struct fio_rwlock *lock;
212 pthread_rwlockattr_t attr;
215 lock = (void *) mmap(NULL, sizeof(struct fio_rwlock),
216 PROT_READ | PROT_WRITE,
217 OS_MAP_ANON | MAP_SHARED, -1, 0);
218 if (lock == MAP_FAILED) {
219 perror("mmap rwlock");
224 lock->magic = FIO_RWLOCK_MAGIC;
226 ret = pthread_rwlockattr_init(&attr);
228 log_err("pthread_rwlockattr_init: %s\n", strerror(ret));
231 #ifdef FIO_HAVE_PSHARED_MUTEX
232 ret = pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
234 log_err("pthread_rwlockattr_setpshared: %s\n", strerror(ret));
238 ret = pthread_rwlock_init(&lock->lock, &attr);
240 ret = pthread_rwlock_init(&lock->lock, NULL);
244 log_err("pthread_rwlock_init: %s\n", strerror(ret));
248 pthread_rwlockattr_destroy(&attr);
252 pthread_rwlockattr_destroy(&attr);
255 fio_rwlock_remove(lock);