mirror of https://github.com/mpv-player/mpv
38 lines
870 B
C
38 lines
870 B
C
#ifndef MP_SEMAPHORE_H_
|
|
#define MP_SEMAPHORE_H_
|
|
|
|
#include <sys/types.h>
|
|
#include <semaphore.h>
|
|
|
|
// macOS provides non-working empty stubs, so we emulate them.
|
|
// This should be AS-safe, but cancellation issues were ignored.
|
|
// sem_getvalue() is not provided.
|
|
// sem_post() won't always correctly return an error on overflow.
|
|
// Process-shared semantics are not provided.
|
|
|
|
#ifdef __APPLE__
|
|
|
|
#define MP_SEMAPHORE_EMULATION
|
|
|
|
#include "osdep/threads.h"
|
|
|
|
#define MP_SEM_VALUE_MAX 4096
|
|
|
|
typedef struct {
|
|
int wakeup_pipe[2];
|
|
mp_mutex lock;
|
|
// protected by lock
|
|
unsigned int count;
|
|
} mp_sem_t;
|
|
|
|
int mp_sem_init(mp_sem_t *sem, int pshared, unsigned int value);
|
|
int mp_sem_wait(mp_sem_t *sem);
|
|
int mp_sem_trywait(mp_sem_t *sem);
|
|
int mp_sem_timedwait(mp_sem_t *sem, int64_t until);
|
|
int mp_sem_post(mp_sem_t *sem);
|
|
int mp_sem_destroy(mp_sem_t *sem);
|
|
|
|
#endif
|
|
|
|
#endif
|