| 1 | #include "pthread_impl.h" |
| 2 | #include <threads.h> |
| 3 | |
| 4 | int mtx_trylock(mtx_t *m) |
| 5 | { |
| 6 | if (m->_m_type == PTHREAD_MUTEX_NORMAL) |
| 7 | return (a_cas(&m->_m_lock, 0, EBUSY) & EBUSY) ? thrd_busy : thrd_success; |
| 8 | |
| 9 | int ret = __pthread_mutex_trylock((pthread_mutex_t *)m); |
| 10 | switch (ret) { |
| 11 | default: return thrd_error; |
| 12 | case 0: return thrd_success; |
| 13 | case EBUSY: return thrd_busy; |
| 14 | } |
| 15 | } |