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

int mtx_unlock(mtx_t *m)
{
	if ((m->_m_type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count) {
		if ((m->_m_lock&0x1fffffff) != __pthread_self()->tid)
			return thrd_error;
                /* _m_count is the count of additional locks, no need to real unlock */
		--m->_m_count;
	} else {
		if (a_swap(&m->_m_lock, 0)<0 || m->_m_waiters)
			__wake(&m->_m_lock, 1, 0);
	}
	return thrd_success;
}