1 files changed, 30 insertions, 0 deletions
diff --git a/src/pthread/pthread_condattr_setclock.cpp b/src/pthread/pthread_condattr_setclock.cpp
new file mode 100644
index 000000000000..6eca8b30ef7f
--- /dev/null
+++ b/src/pthread/pthread_condattr_setclock.cpp
@@ -0,0 +1,30 @@
+//===-- Implementation of the pthread_condattr_setclock -------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "pthread_condattr_setclock.h"
+
+#include "src/__support/common.h"
+
+#include <errno.h>     // EINVAL
+#include <pthread.h>   // pthread_condattr_t
+#include <sys/types.h> // clockid_t
+#include <time.h>      // CLOCK_MONOTONIC, CLOCK_REALTIME
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(int, pthread_condattr_setclock,
+                   (pthread_condattr_t * attr, clockid_t clock)) {
+
+  if (clock != CLOCK_MONOTONIC && clock != CLOCK_REALTIME)
+    return EINVAL;
+
+  attr->clock = clock;
+  return 0;
+}
+
+} // namespace LIBC_NAMESPACE