1#include "pthread_impl.h"
2
3int __pthread_mutex_unlock(pthread_mutex_t *m)
4{
5	pthread_t self;
6	int waiters = m->_m_waiters;
7	int cont;
8	int type = m->_m_type & 15;
9	int priv = (m->_m_type & 128) ^ 128;
10
11	if (type != PTHREAD_MUTEX_NORMAL) {
12		self = __pthread_self();
13		if ((m->_m_lock&0x7fffffff) != self->tid)
14			return EPERM;
15		if ((type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)
16			return m->_m_count--, 0;
17		if (!priv) {
18			self->robust_list.pending = &m->_m_next;
19			__vm_lock();
20		}
21		volatile void *prev = m->_m_prev;
22		volatile void *next = m->_m_next;
23		*(volatile void *volatile *)prev = next;
24		if (next != &self->robust_list.head) *(volatile void *volatile *)
25			((char *)next - sizeof(void *)) = prev;
26	}
27	cont = a_swap(&m->_m_lock, (type & 8) ? 0x7fffffff : 0);
28	if (type != PTHREAD_MUTEX_NORMAL && !priv) {
29		self->robust_list.pending = 0;
30		__vm_unlock();
31	}
32	if (waiters || cont<0)
33		__wake(&m->_m_lock, 1, priv);
34	return 0;
35}
36
37weak_alias(__pthread_mutex_unlock, pthread_mutex_unlock);
38