| 1 | #include "pthread_impl.h" |
| 2 | #include <threads.h> |
| 3 | |
| 4 | int mtx_lock(mtx_t *m) |
| 5 | { |
| 6 | if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_cas(&m->_m_lock, 0, EBUSY)) |
| 7 | return thrd_success; |
| 8 | /* Calling mtx_timedlock with a null pointer is an extension. |
| 9 | * It is convenient, here to avoid duplication of the logic |
| 10 | * for return values. */ |
| 11 | return mtx_timedlock(m, 0); |
| 12 | } |