Lines Matching defs:semaphore
28 #include "semaphore.h"
43 ALOGE("%s unable to allocate semaphore: %s", __func__, strerror(errno));
51 void semaphore_free(semaphore_t *semaphore) {
52 if (semaphore->fd != -1)
53 close(semaphore->fd);
54 free(semaphore);
57 void semaphore_wait(semaphore_t *semaphore) {
58 assert(semaphore != NULL);
59 assert(semaphore->fd != -1);
62 if (eventfd_read(semaphore->fd, &value) == -1)
63 ALOGE("%s unable to wait on semaphore: %s", __func__, strerror(errno));
66 bool semaphore_try_wait(semaphore_t *semaphore) {
67 assert(semaphore != NULL);
68 assert(semaphore->fd != -1);
70 int flags = fcntl(semaphore->fd, F_GETFL);
72 ALOGE("%s unable to get flags for semaphore fd: %s", __func__, strerror(errno));
75 if (fcntl(semaphore->fd, F_SETFL, flags | O_NONBLOCK) == -1) {
76 ALOGE("%s unable to set O_NONBLOCK for semaphore fd: %s", __func__, strerror(errno));
81 if (eventfd_read(semaphore->fd, &value) == -1)
84 if (fcntl(semaphore->fd, F_SETFL, flags) == -1)
85 ALOGE("%s unable to resetore flags for semaphore fd: %s", __func__, strerror(errno));
89 void semaphore_post(semaphore_t *semaphore) {
90 assert(semaphore != NULL);
91 assert(semaphore->fd != -1);
93 if (eventfd_write(semaphore->fd, 1ULL) == -1)
94 ALOGE("%s unable to post to semaphore: %s", __func__, strerror(errno));
97 int semaphore_get_fd(const semaphore_t *semaphore) {
98 assert(semaphore != NULL);
99 assert(semaphore->fd != -1);
100 return semaphore->fd;