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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
49 lines
1.3 KiB
C++
49 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 XP_WIN
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# error This file should only be compiled on Windows.
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#endif
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#include "mozilla/PlatformRWLock.h"
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#include <windows.h>
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#define NativeHandle(m) (reinterpret_cast<SRWLOCK*>(&m))
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mozilla::detail::RWLockImpl::RWLockImpl() {
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static_assert(sizeof(SRWLOCK) <= sizeof(mRWLock), "SRWLOCK is too big!");
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InitializeSRWLock(NativeHandle(mRWLock));
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}
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mozilla::detail::RWLockImpl::~RWLockImpl() {}
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bool mozilla::detail::RWLockImpl::tryReadLock() {
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return TryAcquireSRWLockShared(NativeHandle(mRWLock));
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}
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void mozilla::detail::RWLockImpl::readLock() {
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AcquireSRWLockShared(NativeHandle(mRWLock));
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}
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void mozilla::detail::RWLockImpl::readUnlock() {
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ReleaseSRWLockShared(NativeHandle(mRWLock));
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}
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bool mozilla::detail::RWLockImpl::tryWriteLock() {
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return TryAcquireSRWLockExclusive(NativeHandle(mRWLock));
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}
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void mozilla::detail::RWLockImpl::writeLock() {
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AcquireSRWLockExclusive(NativeHandle(mRWLock));
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}
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void mozilla::detail::RWLockImpl::writeUnlock() {
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ReleaseSRWLockExclusive(NativeHandle(mRWLock));
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}
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#undef NativeHandle
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