RWLock_windows.cpp (1380B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef XP_WIN 8 # error This file should only be compiled on Windows. 9 #endif 10 11 #include "mozilla/PlatformRWLock.h" 12 13 #include <windows.h> 14 15 #define NativeHandle(m) (reinterpret_cast<SRWLOCK*>(&m)) 16 17 mozilla::detail::RWLockImpl::RWLockImpl() { 18 static_assert(sizeof(SRWLOCK) <= sizeof(mRWLock), "SRWLOCK is too big!"); 19 InitializeSRWLock(NativeHandle(mRWLock)); 20 } 21 22 mozilla::detail::RWLockImpl::~RWLockImpl() {} 23 24 bool mozilla::detail::RWLockImpl::tryReadLock() { 25 return TryAcquireSRWLockShared(NativeHandle(mRWLock)); 26 } 27 28 void mozilla::detail::RWLockImpl::readLock() { 29 AcquireSRWLockShared(NativeHandle(mRWLock)); 30 } 31 32 void mozilla::detail::RWLockImpl::readUnlock() { 33 ReleaseSRWLockShared(NativeHandle(mRWLock)); 34 } 35 36 bool mozilla::detail::RWLockImpl::tryWriteLock() { 37 return TryAcquireSRWLockExclusive(NativeHandle(mRWLock)); 38 } 39 40 void mozilla::detail::RWLockImpl::writeLock() { 41 AcquireSRWLockExclusive(NativeHandle(mRWLock)); 42 } 43 44 void mozilla::detail::RWLockImpl::writeUnlock() { 45 ReleaseSRWLockExclusive(NativeHandle(mRWLock)); 46 } 47 48 #undef NativeHandle