Add read-write mutexes

[fio.git] / mutex.c

diff --git a/mutex.c b/mutex.c
index f3c8326663f1d8b350a4b6cc0afd484111682711..bcc37ae648c0bf440949603d762463a1ea74a7f8 100644 (file)
--- a/mutex.c
+++ b/mutex.c
@@ -90,3 +90,39 @@ void fio_mutex_up(struct fio_mutex *mutex)
        mutex->value++;
        pthread_mutex_unlock(&mutex->lock);
 }
        mutex->value++;
        pthread_mutex_unlock(&mutex->lock);
 }

+
+void fio_mutex_down_write(struct fio_mutex *mutex)
+{
+       pthread_mutex_lock(&mutex->lock);
+       while (mutex->value != 0)
+               pthread_cond_wait(&mutex->cond, &mutex->lock);
+       mutex->value--;
+       pthread_mutex_unlock(&mutex->lock);
+}
+
+void fio_mutex_down_read(struct fio_mutex *mutex)
+{
+       pthread_mutex_lock(&mutex->lock);
+       while (mutex->value < 0)
+               pthread_cond_wait(&mutex->cond, &mutex->lock);
+       mutex->value++;
+       pthread_mutex_unlock(&mutex->lock);
+}
+
+void fio_mutex_up_read(struct fio_mutex *mutex)
+{
+       pthread_mutex_lock(&mutex->lock);
+       mutex->value--;
+       if (mutex->value >= 0)
+               pthread_cond_signal(&mutex->cond);
+       pthread_mutex_unlock(&mutex->lock);
+}
+
+void fio_mutex_up_write(struct fio_mutex *mutex)
+{
+       pthread_mutex_lock(&mutex->lock);
+       mutex->value++;
+       if (mutex->value >= 0)
+               pthread_cond_signal(&mutex->cond);
+       pthread_mutex_unlock(&mutex->lock);
+}