1 files changed, 13 insertions, 0 deletions
diff --git a/src/thread/pthread_rwlock_wrlock.c b/src/thread/pthread_rwlock_wrlock.c
new file mode 100644
index 00000000..219e924a
--- /dev/null
+++ b/src/thread/pthread_rwlock_wrlock.c
@@ -0,0 +1,13 @@
+#include "pthread_impl.h"
+
+int pthread_rwlock_wrlock(pthread_rwlock_t *rw)
+{
+	int nr;
+	while (pthread_rwlock_trywrlock(rw)==EAGAIN) {
+		if ((nr=rw->__readers))
+			__wait(&rw->__readers, &rw->__waiters, nr, 0);
+		else
+			__wait(&rw->__wrlock, &rw->__waiters, 1, 0);
+	}
+	return 0;
+}