The Tor Browser: security/sandbox/chromium/base/synchronization/lock.cc@44a2da4a2ab2

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

     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.

     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.

     9 #if !defined(NDEBUG)

    11 #include "base/synchronization/lock.h"

    12 #include "base/logging.h"

    14 namespace base {

    16 const PlatformThreadId kNoThreadId = static_cast<PlatformThreadId>(0);

    18 Lock::Lock() : lock_() {

    19   owned_by_thread_ = false;

    20   owning_thread_id_ = kNoThreadId;

    21 }

    23 Lock::~Lock() {

    24   DCHECK(!owned_by_thread_);

    25   DCHECK_EQ(kNoThreadId, owning_thread_id_);

    26 }

    28 void Lock::AssertAcquired() const {

    29   DCHECK(owned_by_thread_);

    30   DCHECK_EQ(owning_thread_id_, PlatformThread::CurrentId());

    31 }

    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 }

    40 void Lock::CheckUnheldAndMark() {

    41   DCHECK(!owned_by_thread_);

    42   owned_by_thread_ = true;

    43   owning_thread_id_ = PlatformThread::CurrentId();

    44 }

    46 }  // namespace base

    48 #endif  // NDEBUG

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