compiler-rt/lib/gwp_asan/mutex.h

   1 //===-- mutex.h -------------------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef GWP_ASAN_MUTEX_H_
  10 #define GWP_ASAN_MUTEX_H_
  11
  12 #include "gwp_asan/platform_specific/mutex_fuchsia.h" // IWYU pragma: keep
  13 #include "gwp_asan/platform_specific/mutex_posix.h"   // IWYU pragma: keep
  14
  15 namespace gwp_asan {
  16 class Mutex final : PlatformMutex {
  17 public:
  18   constexpr Mutex() = default;
  19   ~Mutex() = default;
  20   Mutex(const Mutex &) = delete;
  21   Mutex &operator=(const Mutex &) = delete;
  22   // Lock the mutex.
  23   void lock();
  24   // Nonblocking trylock of the mutex. Returns true if the lock was acquired.
  25   bool tryLock();
  26   // Unlock the mutex.
  27   void unlock();
  28 };
  29
  30 class ScopedLock {
  31 public:
  32   explicit ScopedLock(Mutex &Mx) : Mu(Mx) { Mu.lock(); }
  33   ~ScopedLock() { Mu.unlock(); }
  34   ScopedLock(const ScopedLock &) = delete;
  35   ScopedLock &operator=(const ScopedLock &) = delete;
  36
  37 private:
  38   Mutex &Mu;
  39 };
  40 } // namespace gwp_asan
  41
  42 #endif // GWP_ASAN_MUTEX_H_