michael@0: // Copyright (c) 2011 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: // This file is used for debugging assertion support.  The Lock class
michael@0: // is functionally a wrapper around the LockImpl class, so the only
michael@0: // real intelligence in the class is in the debugging logic.
michael@0: 
michael@0: #if !defined(NDEBUG)
michael@0: 
michael@0: #include "base/synchronization/lock.h"
michael@0: #include "base/logging.h"
michael@0: 
michael@0: namespace base {
michael@0: 
michael@0: const PlatformThreadId kNoThreadId = static_cast<PlatformThreadId>(0);
michael@0: 
michael@0: Lock::Lock() : lock_() {
michael@0:   owned_by_thread_ = false;
michael@0:   owning_thread_id_ = kNoThreadId;
michael@0: }
michael@0: 
michael@0: Lock::~Lock() {
michael@0:   DCHECK(!owned_by_thread_);
michael@0:   DCHECK_EQ(kNoThreadId, owning_thread_id_);
michael@0: }
michael@0: 
michael@0: void Lock::AssertAcquired() const {
michael@0:   DCHECK(owned_by_thread_);
michael@0:   DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());
michael@0: }
michael@0: 
michael@0: void Lock::CheckHeldAndUnmark() {
michael@0:   DCHECK(owned_by_thread_);
michael@0:   DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());
michael@0:   owned_by_thread_ = false;
michael@0:   owning_thread_id_ = kNoThreadId;
michael@0: }
michael@0: 
michael@0: void Lock::CheckUnheldAndMark() {
michael@0:   DCHECK(!owned_by_thread_);
michael@0:   owned_by_thread_ = true;
michael@0:   owning_thread_id_ = PlatformThread::CurrentId();
michael@0: }
michael@0: 
michael@0: }  // namespace base
michael@0: 
michael@0: #endif  // NDEBUG