{
int r, w=0;
while ((r=pthread_mutex_trylock(m)) == EBUSY) {
+ if (!(r=m->_m_lock) || (r&0x40000000)) continue;
if (!w) a_inc(&m->_m_waiters), w++;
- if (__timedwait(&m->_m_lock, 1, CLOCK_REALTIME, at, 0) == ETIMEDOUT) {
+ if (__timedwait(&m->_m_lock, r, CLOCK_REALTIME, at, 0) == ETIMEDOUT) {
if (w) a_dec(&m->_m_waiters);
return ETIMEDOUT;
}