base/lock.cc

   1 // Copyright (c) 2010 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/lock.h"
  12 #include "base/logging.h"
  13
  14 Lock::Lock() : lock_() {
  15   owned_by_thread_ = false;
  16   owning_thread_id_ = static_cast<PlatformThreadId>(0);
  17 }
  18
  19 void Lock::AssertAcquired() const {
  20   DCHECK(owned_by_thread_);
  21   DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());
  22 }
  23
  24 void Lock::CheckHeldAndUnmark() {
  25   DCHECK(owned_by_thread_);
  26   DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());
  27   owned_by_thread_ = false;
  28   owning_thread_id_ = static_cast<PlatformThreadId>(0);
  29 }
  30
  31 void Lock::CheckUnheldAndMark() {
  32   DCHECK(!owned_by_thread_);
  33   owned_by_thread_ = true;
  34   owning_thread_id_ = PlatformThread::CurrentId();
  35 }
  36
  37 #endif  // NDEBUG