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path: root/src/thread/pthread_rwlock_unlock.c
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Diffstat (limited to 'src/thread/pthread_rwlock_unlock.c')
-rw-r--r--src/thread/pthread_rwlock_unlock.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/thread/pthread_rwlock_unlock.c b/src/thread/pthread_rwlock_unlock.c
new file mode 100644
index 00000000..f39117e7
--- /dev/null
+++ b/src/thread/pthread_rwlock_unlock.c
@@ -0,0 +1,17 @@
+#include "pthread_impl.h"
+
+int pthread_rwlock_unlock(pthread_rwlock_t *rw)
+{
+ struct pthread *self = pthread_self();
+ if (rw->__owner == self->tid) {
+ rw->__owner = 0;
+ a_store(&rw->__wrlock, 0);
+ if (rw->__waiters)
+ __wake(&rw->__wrlock, -1, 0);
+ return 0;
+ }
+ a_dec(&rw->__readers);
+ if (rw->__waiters && !rw->__readers)
+ __wake(&rw->__readers, 1, 0);
+ return 0;
+}