1 files changed, 14 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/thread/pthread_mutex_consistent.c b/libc-top-half/musl/src/thread/pthread_mutex_consistent.c
new file mode 100644
index 0000000..27c74e5
--- /dev/null
+++ b/libc-top-half/musl/src/thread/pthread_mutex_consistent.c
@@ -0,0 +1,14 @@
+#include "pthread_impl.h"
+#include "atomic.h"
+
+int pthread_mutex_consistent(pthread_mutex_t *m)
+{
+	int old = m->_m_lock;
+	int own = old & 0x3fffffff;
+	if (!(m->_m_type & 4) || !own || !(old & 0x40000000))
+		return EINVAL;
+	if (own != __pthread_self()->tid)
+		return EPERM;
+	a_and(&m->_m_lock, ~0x40000000);
+	return 0;
+}