283 static inline void futex_wake(QemuEvent *ev, int n)  in futex_wake()  argument
285     futex(ev, FUTEX_WAKE, n, NULL, NULL, 0);  in futex_wake()
288 static inline void futex_wait(QemuEvent *ev, unsigned val)  in futex_wait()  argument
290     futex(ev, FUTEX_WAIT, (int) val, NULL, NULL, 0);  in futex_wait()
293 static inline void futex_wake(QemuEvent *ev, int n)  in futex_wake()  argument
296         pthread_cond_signal(&ev->cond);  in futex_wake()
298         pthread_cond_broadcast(&ev->cond);  in futex_wake()
302 static inline void futex_wait(QemuEvent *ev, unsigned val)  in futex_wait()  argument
304     pthread_mutex_lock(&ev->lock);  in futex_wait()
305     if (ev->value == val) {  in futex_wait()
306         pthread_cond_wait(&ev->cond, &ev->lock);  in futex_wait()
308     pthread_mutex_unlock(&ev->lock);  in futex_wait()
330 void qemu_event_init(QemuEvent *ev, bool init)  in qemu_event_init()  argument
333     pthread_mutex_init(&ev->lock, NULL);  in qemu_event_init()
334     pthread_cond_init(&ev->cond, NULL);  in qemu_event_init()
337     ev->value = (init ? EV_SET : EV_FREE);  in qemu_event_init()
340 void qemu_event_destroy(QemuEvent *ev)  in qemu_event_destroy()  argument
343     pthread_mutex_destroy(&ev->lock);  in qemu_event_destroy()
344     pthread_cond_destroy(&ev->cond);  in qemu_event_destroy()
348 void qemu_event_set(QemuEvent *ev)  in qemu_event_set()  argument
350     if (atomic_mb_read(&ev->value) != EV_SET) {  in qemu_event_set()
351         if (atomic_xchg(&ev->value, EV_SET) == EV_BUSY) {  in qemu_event_set()
353             futex_wake(ev, INT_MAX);  in qemu_event_set()
358 void qemu_event_reset(QemuEvent *ev)  in qemu_event_reset()  argument
360     if (atomic_mb_read(&ev->value) == EV_SET) {  in qemu_event_reset()
365         atomic_or(&ev->value, EV_FREE);  in qemu_event_reset()
369 void qemu_event_wait(QemuEvent *ev)  in qemu_event_wait()  argument
373     value = atomic_mb_read(&ev->value);  in qemu_event_wait()
382             if (atomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) {  in qemu_event_wait()
386         futex_wait(ev, EV_BUSY);  in qemu_event_wait()