/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef threading_LockGuard_h
#define threading_LockGuard_h

#include "mozilla/Attributes.h"

namespace js {

template <typename Mutex>
class MOZ_RAII UnlockGuard;

template <typename Mutex>
class MOZ_RAII LockGuard {
  friend class UnlockGuard<Mutex>;
  friend class ConditionVariable;
  Mutex& lock;

 public:
  explicit LockGuard(Mutex& aLock) : lock(aLock) { lock.lock(); }

  ~LockGuard() { lock.unlock(); }
};

template <typename Mutex>
class MOZ_RAII UnlockGuard {
  Mutex& lock;

 public:
  explicit UnlockGuard(LockGuard<Mutex>& aGuard) : lock(aGuard.lock) {
    lock.unlock();
  }

  ~UnlockGuard() { lock.lock(); }
};

}  // namespace js

#endif  // threading_LockGuard_h
