- if (!m->_m_lock || m->_m_lock != __pthread_self()->tid)
- return EPERM;
- if (m->_m_type == PTHREAD_MUTEX_RECURSIVE && --m->_m_count)
- return 0;
+ 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;
+ }