initial check-in, version 0.5.0v0.5.0

1 files changed, 17 insertions, 0 deletions

diff --git a/src/thread/pthread_rwlock_timedwrlock.c b/src/thread/pthread_rwlock_timedwrlock.c
new file mode 100644
index 00000000..9f749648
--- /dev/null
+++ b/src/thread/pthread_rwlock_timedwrlock.c
@@ -0,0 +1,17 @@
+#include "pthread_impl.h"
+
+int pthread_rwlock_timedwrlock(pthread_rwlock_t *rw, const struct timespec *at)
+{
+	int nr, *p, w=0;
+	while (pthread_rwlock_trywrlock(rw)==EAGAIN) {
+		if (!w) a_inc(&rw->__waiters), w++;
+		if ((nr=rw->__readers)) p = &rw->__readers;
+		else nr=1, p = &rw->__wrlock;
+		if (__timedwait(p, nr, CLOCK_REALTIME, at, 0)==ETIMEDOUT) {
+			if (w) a_dec(&rw->__waiters);
+			return ETIMEDOUT;
+		}
+	}
+	if (w) a_dec(&rw->__waiters);
+	return 0;
+}