PlatformRWLock.h - mozsearch

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/* -*- 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 mozilla_PlatformRWLock_h

#define mozilla_PlatformRWLock_h

#include "mozilla/Types.h"

#ifndef XP_WIN

#  include <pthread.h>

#endif

namespace mozilla::detail {

class RWLockImpl {

 public:

  explicit MFBT_API RWLockImpl();

  MFBT_API ~RWLockImpl();

 protected:

  [[nodiscard]] MFBT_API bool tryReadLock();

  MFBT_API void readLock();

  MFBT_API void readUnlock();

  [[nodiscard]] MFBT_API bool tryWriteLock();

  MFBT_API void writeLock();

  MFBT_API void writeUnlock();

 private:

  RWLockImpl(const RWLockImpl&) = delete;

  void operator=(const RWLockImpl&) = delete;

  RWLockImpl(RWLockImpl&&) = delete;

  void operator=(RWLockImpl&&) = delete;

  bool operator==(const RWLockImpl& rhs) = delete;

#ifndef XP_WIN

  pthread_rwlock_t mRWLock;

#else

  // SRWLock is pointer-sized. We declare it in such a fashion here to avoid

  // pulling in windows.h wherever this header is used.

  void* mRWLock;

#endif

};

}  // namespace mozilla::detail

#endif  // mozilla_PlatformRWLock_h