mozglue/misc/Mutex_windows.cpp
author Emilio Cobos Álvarez <emilio@crisal.io>
Tue, 02 Jul 2019 18:50:04 +0000
changeset 480995 6525ac41c35455512bc1b681df331a5b74cb75cc
parent 453088 c275c8909c57f4e008756e24de1bc5b3f1333a4f
child 515833 d407a28318e68dd78af8365a1ea3f8f7384f92c5
permissions -rw-r--r--
Bug 1562789 - SmallPointerArray should support moves, and have an IsEmpty() helper. r=froydnj This also implicitly deletes its copy-assignment operator and copy-constructor, which is great since it's a huge footgun. Differential Revision: https://phabricator.services.mozilla.com/D36549

/* -*- 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/. */

#include "mozilla/Assertions.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/PlatformMutex.h"

#include <windows.h>

#include "MutexPlatformData_windows.h"

mozilla::detail::MutexImpl::MutexImpl(recordreplay::Behavior aRecorded) {
  InitializeSRWLock(&platformData()->lock);
}

mozilla::detail::MutexImpl::~MutexImpl() {}

void mozilla::detail::MutexImpl::lock() {
  AcquireSRWLockExclusive(&platformData()->lock);
}

bool mozilla::detail::MutexImpl::tryLock() { return mutexTryLock(); }

bool mozilla::detail::MutexImpl::mutexTryLock() {
  return !!TryAcquireSRWLockExclusive(&platformData()->lock);
}

void mozilla::detail::MutexImpl::unlock() {
  ReleaseSRWLockExclusive(&platformData()->lock);
}

mozilla::detail::MutexImpl::PlatformData*
mozilla::detail::MutexImpl::platformData() {
  static_assert(sizeof(platformData_) >= sizeof(PlatformData),
                "platformData_ is too small");
  return reinterpret_cast<PlatformData*>(platformData_);
}