diff options
| -rw-r--r-- | include/qemu/thread-posix.h | 2 | ||||
| -rw-r--r-- | util/qemu-thread-posix.c | 28 |
2 files changed, 17 insertions, 13 deletions
diff --git a/include/qemu/thread-posix.h b/include/qemu/thread-posix.h index 0f30dccb53..361566abc4 100644 --- a/include/qemu/thread-posix.h +++ b/include/qemu/thread-posix.h @@ -15,7 +15,7 @@ struct QemuSemaphore { #if defined(__APPLE__) || defined(__NetBSD__) pthread_mutex_t lock; pthread_cond_t cond; - int count; + unsigned int count; #else sem_t sem; #endif diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c index 4489abf1d8..4de133e7b2 100644 --- a/util/qemu-thread-posix.c +++ b/util/qemu-thread-posix.c @@ -170,12 +170,11 @@ void qemu_sem_post(QemuSemaphore *sem) #if defined(__APPLE__) || defined(__NetBSD__) pthread_mutex_lock(&sem->lock); - if (sem->count == INT_MAX) { + if (sem->count == UINT_MAX) { rc = EINVAL; - } else if (sem->count++ < 0) { - rc = pthread_cond_signal(&sem->cond); } else { - rc = 0; + sem->count++; + rc = pthread_cond_signal(&sem->cond); } pthread_mutex_unlock(&sem->lock); if (rc != 0) { @@ -207,19 +206,21 @@ int qemu_sem_timedwait(QemuSemaphore *sem, int ms) struct timespec ts; #if defined(__APPLE__) || defined(__NetBSD__) + rc = 0; compute_abs_deadline(&ts, ms); pthread_mutex_lock(&sem->lock); - --sem->count; - while (sem->count < 0) { + while (sem->count == 0) { rc = pthread_cond_timedwait(&sem->cond, &sem->lock, &ts); if (rc == ETIMEDOUT) { - ++sem->count; break; } if (rc != 0) { error_exit(rc, __func__); } } + if (rc != ETIMEDOUT) { + --sem->count; + } pthread_mutex_unlock(&sem->lock); return (rc == ETIMEDOUT ? -1 : 0); #else @@ -249,16 +250,19 @@ int qemu_sem_timedwait(QemuSemaphore *sem, int ms) void qemu_sem_wait(QemuSemaphore *sem) { + int rc; + #if defined(__APPLE__) || defined(__NetBSD__) pthread_mutex_lock(&sem->lock); - --sem->count; - while (sem->count < 0) { - pthread_cond_wait(&sem->cond, &sem->lock); + while (sem->count == 0) { + rc = pthread_cond_wait(&sem->cond, &sem->lock); + if (rc != 0) { + error_exit(rc, __func__); + } } + --sem->count; pthread_mutex_unlock(&sem->lock); #else - int rc; - do { rc = sem_wait(&sem->sem); } while (rc == -1 && errno == EINTR); |