1 #include "pthread_impl.h"
3 int pthread_mutex_trylock(pthread_mutex_t *m)
7 if (m->_m_type == PTHREAD_MUTEX_NORMAL)
8 return -a_xchg(&m->_m_lock, 1) & EBUSY;
10 tid = pthread_self()->tid;
12 if (m->_m_owner == tid) {
13 if (m->_m_type != PTHREAD_MUTEX_RECURSIVE)
15 if ((unsigned)m->_m_count >= INT_MAX) return EAGAIN;
20 if (a_xchg(&m->_m_lock, 1)) return EBUSY;