summaryrefslogblamecommitdiff
path: root/src/thread/mtx_trylock.c
blob: 40a8b8c2977212c3006b91f5072be3a514beb5b2 (plain) (tree)
1
2
3
4
5
6
7
8
9


                         




                                                                                         
                                                                





                                        
#include "pthread_impl.h"
#include <threads.h>

int mtx_trylock(mtx_t *m)
{
	if (m->_m_type == PTHREAD_MUTEX_NORMAL)
		return (a_cas(&m->_m_lock, 0, EBUSY) & EBUSY) ? thrd_busy : thrd_success;

	int ret = __pthread_mutex_trylock((pthread_mutex_t *)m);
	switch (ret) {
	default:    return thrd_error;
	case 0:     return thrd_success;
	case EBUSY: return thrd_busy;
	}
}