256 void qemu_sem_init(QemuSemaphore *sem, int init)  in qemu_sem_init()  argument
258     qemu_mutex_init(&sem->mutex);  in qemu_sem_init()
259     qemu_cond_init(&sem->cond);  in qemu_sem_init()
264     sem->count = init;  in qemu_sem_init()
267 void qemu_sem_destroy(QemuSemaphore *sem)  in qemu_sem_destroy()  argument
269     qemu_cond_destroy(&sem->cond);  in qemu_sem_destroy()
270     qemu_mutex_destroy(&sem->mutex);  in qemu_sem_destroy()
273 void qemu_sem_post(QemuSemaphore *sem)  in qemu_sem_post()  argument
275     qemu_mutex_lock(&sem->mutex);  in qemu_sem_post()
276     if (sem->count == UINT_MAX) {  in qemu_sem_post()
279         sem->count++;  in qemu_sem_post()
280         qemu_cond_signal(&sem->cond);  in qemu_sem_post()
282     qemu_mutex_unlock(&sem->mutex);  in qemu_sem_post()
285 int qemu_sem_timedwait(QemuSemaphore *sem, int ms)  in qemu_sem_timedwait()  argument
291     qemu_mutex_lock(&sem->mutex);  in qemu_sem_timedwait()
292     while (sem->count == 0) {  in qemu_sem_timedwait()
296             rc = qemu_cond_timedwait_ts(&sem->cond, &sem->mutex, &ts,  in qemu_sem_timedwait()
304         --sem->count;  in qemu_sem_timedwait()
306     qemu_mutex_unlock(&sem->mutex);  in qemu_sem_timedwait()
310 void qemu_sem_wait(QemuSemaphore *sem)  in qemu_sem_wait()  argument
312     qemu_mutex_lock(&sem->mutex);  in qemu_sem_wait()
313     while (sem->count == 0) {  in qemu_sem_wait()
314         qemu_cond_wait(&sem->cond, &sem->mutex);  in qemu_sem_wait()
316     --sem->count;  in qemu_sem_wait()
317     qemu_mutex_unlock(&sem->mutex);  in qemu_sem_wait()