54 void semaphore_free(semaphore_t* semaphore) {  in semaphore_free()  argument
55   if (!semaphore) return;  in semaphore_free()
57   if (semaphore->fd != INVALID_FD) close(semaphore->fd);  in semaphore_free()
58   osi_free(semaphore);  in semaphore_free()
61 void semaphore_wait(semaphore_t* semaphore) {  in semaphore_wait()  argument
62   CHECK(semaphore != NULL);  in semaphore_wait()
63   CHECK(semaphore->fd != INVALID_FD);  in semaphore_wait()
66   if (eventfd_read(semaphore->fd, &value) == -1)  in semaphore_wait()
70 bool semaphore_try_wait(semaphore_t* semaphore) {  in semaphore_try_wait()  argument
71   CHECK(semaphore != NULL);  in semaphore_try_wait()
72   CHECK(semaphore->fd != INVALID_FD);  in semaphore_try_wait()
74   int flags = fcntl(semaphore->fd, F_GETFL);  in semaphore_try_wait()
80   if (fcntl(semaphore->fd, F_SETFL, flags | O_NONBLOCK) == -1) {  in semaphore_try_wait()
88   if (eventfd_read(semaphore->fd, &value) == -1) rc = false;  in semaphore_try_wait()
90   if (fcntl(semaphore->fd, F_SETFL, flags) == -1)  in semaphore_try_wait()
96 void semaphore_post(semaphore_t* semaphore) {  in semaphore_post()  argument
97   CHECK(semaphore != NULL);  in semaphore_post()
98   CHECK(semaphore->fd != INVALID_FD);  in semaphore_post()
100   if (eventfd_write(semaphore->fd, 1ULL) == -1)  in semaphore_post()
104 int semaphore_get_fd(const semaphore_t* semaphore) {  in semaphore_get_fd()  argument
105   CHECK(semaphore != NULL);  in semaphore_get_fd()
106   CHECK(semaphore->fd != INVALID_FD);  in semaphore_get_fd()
107   return semaphore->fd;  in semaphore_get_fd()