#include "time.h"
#include "gettime.h"
-static clockid_t fio_clk_id = CLOCK_REALTIME;
-
void fio_mutex_remove(struct fio_mutex *mutex)
{
pthread_cond_destroy(&mutex->cond);
pthread_condattr_init(&cond);
#ifdef FIO_HAVE_PSHARED_MUTEX
pthread_condattr_setpshared(&cond, PTHREAD_PROCESS_SHARED);
-#endif
-#ifdef FIO_HAVE_PTHREAD_CONDATTR_SETCLOCK
- pthread_condattr_setclock(&cond, fio_clk_id);
#endif
pthread_cond_init(&mutex->cond, &cond);
struct timespec t;
int ret = 0;
- fio_gettime(&tv_s, NULL);
-
- clock_gettime(fio_clk_id, &t);
- t.tv_sec += seconds;
+ gettimeofday(&tv_s, NULL);
+ t.tv_sec = tv_s.tv_sec + seconds;
+ t.tv_nsec = tv_s.tv_usec * 1000;
pthread_mutex_lock(&mutex->lock);
* way too early, double check.
*/
ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t);
- if (ret == ETIMEDOUT && !mutex_timed_out(&tv_s, seconds)) {
- pthread_mutex_lock(&mutex->lock);
+ if (ret == ETIMEDOUT && !mutex_timed_out(&tv_s, seconds))
ret = 0;
- }
mutex->waiters--;
}
pthread_mutex_unlock(&mutex->lock);
}
-void fio_mutex_down_write(struct fio_mutex *mutex)
+void fio_rwlock_write(struct fio_rwlock *lock)
{
- pthread_mutex_lock(&mutex->lock);
-
- while (mutex->value != 0) {
- mutex->waiters++;
- pthread_cond_wait(&mutex->cond, &mutex->lock);
- mutex->waiters--;
- }
-
- mutex->value--;
- pthread_mutex_unlock(&mutex->lock);
+ pthread_rwlock_wrlock(&lock->lock);
}
-void fio_mutex_down_read(struct fio_mutex *mutex)
+void fio_rwlock_read(struct fio_rwlock *lock)
{
- pthread_mutex_lock(&mutex->lock);
-
- while (mutex->value < 0) {
- mutex->waiters++;
- pthread_cond_wait(&mutex->cond, &mutex->lock);
- mutex->waiters--;
- }
-
- mutex->value++;
- pthread_mutex_unlock(&mutex->lock);
+ pthread_rwlock_rdlock(&lock->lock);
}
-void fio_mutex_up_read(struct fio_mutex *mutex)
+void fio_rwlock_unlock(struct fio_rwlock *lock)
{
- pthread_mutex_lock(&mutex->lock);
- mutex->value--;
- read_barrier();
- if (mutex->value >= 0 && mutex->waiters)
- pthread_cond_signal(&mutex->cond);
- pthread_mutex_unlock(&mutex->lock);
+ pthread_rwlock_unlock(&lock->lock);
}
-void fio_mutex_up_write(struct fio_mutex *mutex)
+void fio_rwlock_remove(struct fio_rwlock *lock)
{
- pthread_mutex_lock(&mutex->lock);
- mutex->value++;
- read_barrier();
- if (mutex->value >= 0 && mutex->waiters)
- pthread_cond_signal(&mutex->cond);
- pthread_mutex_unlock(&mutex->lock);
+ munmap((void *) lock, sizeof(*lock));
}
-static void fio_init fio_mutex_global_init(void)
+struct fio_rwlock *fio_rwlock_init(void)
{
-#ifdef FIO_HAVE_PTHREAD_CONDATTR_SETCLOCK
-#ifdef FIO_HAVE_CLOCK_MONOTONIC
- pthread_condattr_t cond;
+ struct fio_rwlock *lock;
+ int ret;
- pthread_condattr_init(&cond);
+ lock = (void *) mmap(NULL, sizeof(struct fio_rwlock),
+ PROT_READ | PROT_WRITE,
+ OS_MAP_ANON | MAP_SHARED, -1, 0);
+ if (lock == MAP_FAILED) {
+ perror("mmap rwlock");
+ lock = NULL;
+ goto err;
+ }
- if (!pthread_condattr_setclock(&cond, CLOCK_MONOTONIC))
- fio_clk_id = CLOCK_MONOTONIC;
+ ret = pthread_rwlock_init(&lock->lock, NULL);
+ if (ret) {
+ log_err("pthread_rwlock_init: %s\n", strerror(ret));
+ goto err;
+ }
- pthread_condattr_destroy(&cond);
-#endif
-#endif
+ return lock;
+err:
+ if (lock)
+ fio_rwlock_remove(lock);
+ return NULL;
}