mozglue/misc/Mutex_windows.cpp

   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 #include "mozilla/Assertions.h"
   8 #include "mozilla/DebugOnly.h"
   9 #include "mozilla/PlatformMutex.h"
  10
  11 #include <windows.h>
  12
  13 #include "MutexPlatformData_windows.h"
  14
  15 mozilla::detail::MutexImpl::MutexImpl() {
  16   InitializeSRWLock(&platformData()->lock);
  17 }
  18
  19 mozilla::detail::MutexImpl::~MutexImpl() {}
  20
  21 void mozilla::detail::MutexImpl::lock() {
  22   AcquireSRWLockExclusive(&platformData()->lock);
  23 }
  24
  25 bool mozilla::detail::MutexImpl::tryLock() { return mutexTryLock(); }
  26
  27 bool mozilla::detail::MutexImpl::mutexTryLock() {
  28   return !!TryAcquireSRWLockExclusive(&platformData()->lock);
  29 }
  30
  31 void mozilla::detail::MutexImpl::unlock() {
  32   ReleaseSRWLockExclusive(&platformData()->lock);
  33 }
  34
  35 mozilla::detail::MutexImpl::PlatformData*
  36 mozilla::detail::MutexImpl::platformData() {
  37   static_assert(sizeof(platformData_) >= sizeof(PlatformData),
  38                 "platformData_ is too small");
  39   return reinterpret_cast<PlatformData*>(platformData_);
  40 }