xref: /freebsd/contrib/llvm-project/compiler-rt/lib/gwp_asan/mutex.h (revision f81cdf24ba5436367377f7c8e8f51f6df2a75ca7)
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 Μ
39 };
40 } // namespace gwp_asan
41 
42 #endif // GWP_ASAN_MUTEX_H_
43