unify and overhaul timed futex waits

new features:

- FUTEX_WAIT_BITSET op will be used for timed waits if available. this
  saves a call to clock_gettime.

- error checking for the timespec struct is now inside __timedwait so
  it doesn't need to be duplicated everywhere. cond_timedwait still
  needs to duplicate it to avoid unlocking the mutex, though.

- pushing and popping the cancellation handler is delegated to
  __timedwait, and cancellable/non-cancellable waits are unified.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/thread/pthread_rwlock_timedrdlock.c b/src/thread/pthread_rwlock_timedrdlock.c
index 1e76a8e1..a6f61b05 100644
--- a/src/thread/pthread_rwlock_timedrdlock.c
+++ b/src/thread/pthread_rwlock_timedrdlock.c
@@ -5,7 +5,7 @@ int pthread_rwlock_timedrdlock(pthread_rwlock_t *rw, const struct timespec *at)
 	int w=0;
 	while (pthread_rwlock_tryrdlock(rw)) {
 		if (!w) a_inc(&rw->_rw_waiters), w++;
-		if (__timedwait(&rw->_rw_wrlock, 1, CLOCK_REALTIME, at, 0)==ETIMEDOUT) {
+		if (__timedwait(&rw->_rw_wrlock, 1, CLOCK_REALTIME, at, 0, 0, 0)==ETIMEDOUT) {
 			if (w) a_dec(&rw->_rw_waiters);
 			return ETIMEDOUT;
 		}