1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/sandbox/chromium/base/synchronization/lock.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,48 @@
1.4 +// Copyright (c) 2011 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +// This file is used for debugging assertion support. The Lock class
1.9 +// is functionally a wrapper around the LockImpl class, so the only
1.10 +// real intelligence in the class is in the debugging logic.
1.11 +
1.12 +#if !defined(NDEBUG)
1.13 +
1.14 +#include "base/synchronization/lock.h"
1.15 +#include "base/logging.h"
1.16 +
1.17 +namespace base {
1.18 +
1.19 +const PlatformThreadId kNoThreadId = static_cast<PlatformThreadId>(0);
1.20 +
1.21 +Lock::Lock() : lock_() {
1.22 + owned_by_thread_ = false;
1.23 + owning_thread_id_ = kNoThreadId;
1.24 +}
1.25 +
1.26 +Lock::~Lock() {
1.27 + DCHECK(!owned_by_thread_);
1.28 + DCHECK_EQ(kNoThreadId, owning_thread_id_);
1.29 +}
1.30 +
1.31 +void Lock::AssertAcquired() const {
1.32 + DCHECK(owned_by_thread_);
1.33 + DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());
1.34 +}
1.35 +
1.36 +void Lock::CheckHeldAndUnmark() {
1.37 + DCHECK(owned_by_thread_);
1.38 + DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());
1.39 + owned_by_thread_ = false;
1.40 + owning_thread_id_ = kNoThreadId;
1.41 +}
1.42 +
1.43 +void Lock::CheckUnheldAndMark() {
1.44 + DCHECK(!owned_by_thread_);
1.45 + owned_by_thread_ = true;
1.46 + owning_thread_id_ = PlatformThread::CurrentId();
1.47 +}
1.48 +
1.49 +} // namespace base
1.50 +
1.51 +#endif // NDEBUG
