base/synchronization/lock.cc

   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 Lock::Lock() : lock_() {
  17   owned_by_thread_ = false;
  18   owning_thread_id_ = static_cast<PlatformThreadId>(0);
  19 }
  20
  21 void Lock::AssertAcquired() const {
  22   DCHECK(owned_by_thread_);
  23   DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());
  24 }
  25
  26 void Lock::CheckHeldAndUnmark() {
  27   DCHECK(owned_by_thread_);
  28   DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());
  29   owned_by_thread_ = false;
  30   owning_thread_id_ = static_cast<PlatformThreadId>(0);
  31 }
  32
  33 void Lock::CheckUnheldAndMark() {
  34   DCHECK(!owned_by_thread_);
  35   owned_by_thread_ = true;
  36   owning_thread_id_ = PlatformThread::CurrentId();
  37 }
  38
  39 }  // namespace base
  40
  41 #endif  // NDEBUG