1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This file is used for debugging assertion support. The Lock class 6 // is functionally a wrapper around the LockImpl class, so the only 7 // real intelligence in the class is in the debugging logic. 8 9 #if !defined(NDEBUG) 10 11 #include "base/synchronization/lock.h" 12 #include "base/logging.h" 13 14 namespace base { 15 16 const PlatformThreadId kNoThreadId = static_cast<PlatformThreadId>(0); 17 18 Lock::Lock() : lock_() { 19 owned_by_thread_ = false; 20 owning_thread_id_ = kNoThreadId; 21 } 22 23 Lock::~Lock() { 24 DCHECK(!owned_by_thread_); 25 DCHECK_EQ(kNoThreadId, owning_thread_id_); 26 } 27 28 void Lock::AssertAcquired() const { 29 DCHECK(owned_by_thread_); 30 DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId()); 31 } 32 33 void Lock::CheckHeldAndUnmark() { 34 DCHECK(owned_by_thread_); 35 DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId()); 36 owned_by_thread_ = false; 37 owning_thread_id_ = kNoThreadId; 38 } 39 40 void Lock::CheckUnheldAndMark() { 41 DCHECK(!owned_by_thread_); 42 owned_by_thread_ = true; 43 owning_thread_id_ = PlatformThread::CurrentId(); 44 } 45 46 } // namespace base 47 48 #endif // NDEBUG 49
