1 files changed, 42 insertions, 0 deletions

diff --git a/contrib/llvm-project/compiler-rt/lib/gwp_asan/mutex.h b/contrib/llvm-project/compiler-rt/lib/gwp_asan/mutex.h
new file mode 100644
index 000000000000..34b91a2880dd
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/gwp_asan/mutex.h
@@ -0,0 +1,42 @@
+//===-- mutex.h -------------------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef GWP_ASAN_MUTEX_H_
+#define GWP_ASAN_MUTEX_H_
+
+#include "gwp_asan/platform_specific/mutex_fuchsia.h" // IWYU pragma: keep
+#include "gwp_asan/platform_specific/mutex_posix.h"   // IWYU pragma: keep
+
+namespace gwp_asan {
+class Mutex final : PlatformMutex {
+public:
+  constexpr Mutex() = default;
+  ~Mutex() = default;
+  Mutex(const Mutex &) = delete;
+  Mutex &operator=(const Mutex &) = delete;
+  // Lock the mutex.
+  void lock();
+  // Nonblocking trylock of the mutex. Returns true if the lock was acquired.
+  bool tryLock();
+  // Unlock the mutex.
+  void unlock();
+};
+
+class ScopedLock {
+public:
+  explicit ScopedLock(Mutex &Mx) : Mu(Mx) { Mu.lock(); }
+  ~ScopedLock() { Mu.unlock(); }
+  ScopedLock(const ScopedLock &) = delete;
+  ScopedLock &operator=(const ScopedLock &) = delete;
+
+private:
+  Mutex Μ
+};
+} // namespace gwp_asan
+
+#endif // GWP_ASAN_MUTEX_H_