+ if (type != PTHREAD_MUTEX_NORMAL) {
+ self = __pthread_self();
+ if ((m->_m_lock&0x7fffffff) != self->tid)
+ return EPERM;
+ if ((type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)
+ return m->_m_count--, 0;
+ if (!priv) {
+ self->robust_list.pending = &m->_m_next;
+ __vm_lock();
+ }
+ volatile void *prev = m->_m_prev;
+ volatile void *next = m->_m_next;
+ *(volatile void *volatile *)prev = next;
+ if (next != &self->robust_list.head) *(volatile void *volatile *)
+ ((char *)next - sizeof(void *)) = prev;
+ }
+ cont = a_swap(&m->_m_lock, (type & 8) ? 0x40000000 : 0);
+ if (type != PTHREAD_MUTEX_NORMAL && !priv) {
+ self->robust_list.pending = 0;
+ __vm_unlock();
+ }
+ if (waiters || cont<0)
+ __wake(&m->_m_lock, 1, priv);