summaryrefslogblamecommitdiff
path: root/src/thread/pthread_rwlock_trywrlock.c
blob: 202e256aa0471de4e20d21696b312191e6fa703a (plain) (tree)
1
2
3
4
5
6
7
8
9



                                                  
                                       
                             

                                            
                             
         
                                            

                 
#include "pthread_impl.h"

int pthread_rwlock_trywrlock(pthread_rwlock_t *rw)
{
	if (a_xchg(&rw->_rw_wrlock, 1))
		return EBUSY;
	if (rw->_rw_readers) {
		a_store(&rw->_rw_wrlock, 0);
		return EBUSY;
	}
	rw->_rw_owner = pthread_self()->tid;
	return 0;
}