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97bc60386d
This is consistent with how xpcom's Mutex has its platform-dependent code in mozglue, and will allow readers-writer locks in mozglue without duplication. Differential Revision: https://phabricator.services.mozilla.com/D139669
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_PlatformRWLock_h
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#define mozilla_PlatformRWLock_h
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#include "mozilla/Types.h"
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#ifndef XP_WIN
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# include <pthread.h>
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#endif
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namespace mozilla::detail {
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class RWLockImpl {
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public:
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explicit MFBT_API RWLockImpl();
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MFBT_API ~RWLockImpl();
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protected:
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[[nodiscard]] MFBT_API bool tryReadLock();
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MFBT_API void readLock();
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MFBT_API void readUnlock();
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[[nodiscard]] MFBT_API bool tryWriteLock();
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MFBT_API void writeLock();
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MFBT_API void writeUnlock();
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private:
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RWLockImpl(const RWLockImpl&) = delete;
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void operator=(const RWLockImpl&) = delete;
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RWLockImpl(RWLockImpl&&) = delete;
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void operator=(RWLockImpl&&) = delete;
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bool operator==(const RWLockImpl& rhs) = delete;
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#ifndef XP_WIN
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pthread_rwlock_t mRWLock;
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#else
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// SRWLock is pointer-sized. We declare it in such a fashion here to avoid
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// pulling in windows.h wherever this header is used.
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void* mRWLock;
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#endif
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};
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} // namespace mozilla::detail
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#endif // mozilla_PlatformRWLock_h
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