| 1 | #include "pthread_impl.h" |
| 2 | |
| 3 | int __pthread_mutex_trylock(pthread_mutex_t *m) |
| 4 | { |
| 5 | /* |
| 6 | _m_type[1:0] - type |
| 7 | 0 - normal |
| 8 | 1 - recursive |
| 9 | 2 - errorcheck |
| 10 | */ |
| 11 | if (m->_m_type&3 != PTHREAD_MUTEX_RECURSIVE) { |
| 12 | if (m->_m_count) return EBUSY; |
| 13 | m->_m_count = 1; |
| 14 | } else { |
| 15 | if ((unsigned)m->_m_count >= INT_MAX) return EAGAIN; |
| 16 | m->_m_count++; |
| 17 | } |
| 18 | return 0; |
| 19 | } |
| 20 | |
| 21 | weak_alias(__pthread_mutex_trylock, pthread_mutex_trylock); |