+ /* Signal to trylock that we already have the lock. */
+ m->_m_count = -1;
+ return __pthread_mutex_trylock(m);
+ case ETIMEDOUT:
+ return e;
+ case EDEADLK:
+ if ((type&3) == PTHREAD_MUTEX_ERRORCHECK) return e;
+ }
+ do e = __timedwait(&(int){0}, 0, CLOCK_REALTIME, at, 1);
+ while (e != ETIMEDOUT);
+ return e;
+}
+
+int __pthread_mutex_timedlock(pthread_mutex_t *restrict m, const struct timespec *restrict at)
+{
+ if ((m->_m_type&15) == PTHREAD_MUTEX_NORMAL
+ && !a_cas(&m->_m_lock, 0, EBUSY))
+ return 0;
+
+ int type = m->_m_type;
+ int r, t, priv = (type & 128) ^ 128;
+
+ r = __pthread_mutex_trylock(m);
+ if (r != EBUSY) return r;
+
+ if (type&8) return pthread_mutex_timedlock_pi(m, at);
+
+ int spins = 100;
+ while (spins-- && m->_m_lock && !m->_m_waiters) a_spin();
+
+ while ((r=__pthread_mutex_trylock(m)) == EBUSY) {
+ r = m->_m_lock;
+ int own = r & 0x3fffffff;
+ if (!own && (!r || (type&4)))
+ continue;
+ if ((type&3) == PTHREAD_MUTEX_ERRORCHECK
+ && own == __pthread_self()->tid)
+ return EDEADLK;
+
+ a_inc(&m->_m_waiters);
+ t = r | 0x80000000;
+ a_cas(&m->_m_lock, r, t);
+ r = __timedwait(&m->_m_lock, t, CLOCK_REALTIME, at, priv);
+ a_dec(&m->_m_waiters);
+ if (r && r != EINTR) break;