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#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;
}
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