40   int fd;  member
45   ret->fd = eventfd(value, EFD_SEMAPHORE);  in semaphore_new()
46   if (ret->fd == INVALID_FD) {  in semaphore_new()
58   if (semaphore->fd != INVALID_FD)  in semaphore_free()
59     close(semaphore->fd);  in semaphore_free()
65   assert(semaphore->fd != INVALID_FD);  in semaphore_wait()
68   if (eventfd_read(semaphore->fd, &value) == -1)  in semaphore_wait()
74   assert(semaphore->fd != INVALID_FD);  in semaphore_try_wait()
76   int flags = fcntl(semaphore->fd, F_GETFL);  in semaphore_try_wait()
81   if (fcntl(semaphore->fd, F_SETFL, flags | O_NONBLOCK) == -1) {  in semaphore_try_wait()
88   if (eventfd_read(semaphore->fd, &value) == -1)  in semaphore_try_wait()
91   if (fcntl(semaphore->fd, F_SETFL, flags) == -1)  in semaphore_try_wait()
98   assert(semaphore->fd != INVALID_FD);  in semaphore_post()
100   if (eventfd_write(semaphore->fd, 1ULL) == -1)  in semaphore_post()
106   assert(semaphore->fd != INVALID_FD);  in semaphore_get_fd()
107   return semaphore->fd;  in semaphore_get_fd()