- if (m->_m_type == PTHREAD_MUTEX_NORMAL)
- return (m->_m_lock || a_swap(&m->_m_lock, 1)) ? EBUSY : 0;
-
- self = pthread_self();
- tid = self->tid | 0x80000000;
-
- if (m->_m_type >= 4) {
- if (!self->robust_list.off)
- syscall2(__NR_set_robust_list,
- (long)&self->robust_list, 3*sizeof(long));
- self->robust_list.off = (char*)&m->_m_lock-(char *)&m->_m_next;
- self->robust_list.pending = &m->_m_next;
+ old = m->_m_lock;
+ own = old & 0x3fffffff;
+ if (own == tid) {
+ if ((type&8) && m->_m_count<0) {
+ old &= 0x40000000;
+ m->_m_count = 0;
+ goto success;
+ }
+ if ((type&3) == PTHREAD_MUTEX_RECURSIVE) {
+ if ((unsigned)m->_m_count >= INT_MAX) return EAGAIN;
+ m->_m_count++;
+ return 0;
+ }