conclusion

1 files changed, 13 insertions, 0 deletions

diff --git a/05/musl-0.6.0/src/thread/pthread_rwlock_tryrdlock.c b/05/musl-0.6.0/src/thread/pthread_rwlock_tryrdlock.c
new file mode 100644
index 0000000..fc1d532
--- /dev/null
+++ b/05/musl-0.6.0/src/thread/pthread_rwlock_tryrdlock.c
@@ -0,0 +1,13 @@
+#include "pthread_impl.h"
+
+int pthread_rwlock_tryrdlock(pthread_rwlock_t *rw)
+{
+	a_inc(&rw->_rw_readers);
+	if (rw->_rw_wrlock) {
+		a_dec(&rw->_rw_readers);
+		if (rw->_rw_waiters && !rw->_rw_readers)
+			__wake(&rw->_rw_readers, 1, 0);
+		return EAGAIN;
+	}
+	return 0;
+}