b6f9974ad8
right now it's questionable whether this change is an improvement or not, but if we later want to support priority inheritance mutexes, it will be important to have the code paths unified like this to avoid major code duplication.
31 lines
739 B
C
31 lines
739 B
C
#include "pthread_impl.h"
|
|
|
|
int pthread_mutex_unlock(pthread_mutex_t *m)
|
|
{
|
|
pthread_t self;
|
|
int waiters = m->_m_waiters;
|
|
int cont;
|
|
int robust = 0;
|
|
|
|
if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
|
|
if (!m->_m_lock)
|
|
return EPERM;
|
|
self = pthread_self();
|
|
if ((m->_m_lock&0x1fffffff) != self->tid)
|
|
return EPERM;
|
|
if ((m->_m_type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)
|
|
return m->_m_count--, 0;
|
|
if (m->_m_type >= 4) {
|
|
robust = 1;
|
|
self->robust_list.pending = &m->_m_next;
|
|
*(void **)m->_m_prev = m->_m_next;
|
|
if (m->_m_next) ((void **)m->_m_next)[-1] = m->_m_prev;
|
|
}
|
|
}
|
|
cont = a_swap(&m->_m_lock, 0);
|
|
if (robust)
|
|
self->robust_list.pending = 0;
|
|
if (waiters || cont<0)
|
|
__wake(&m->_m_lock, 1, 0);
|
|
return 0;
|
|
}
|