blob: daa774b0f919f495e16144ae2b112c4fec7c84e3 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/sequence_checker_impl.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/sequence_token.h"
#include "base/threading/thread_checker_impl.h"
namespace base {
class SequenceCheckerImpl::Core {
Core() : sequence_token_(SequenceToken::GetForCurrentThread()) {}
~Core() = default;
bool CalledOnValidSequence() const {
if (sequence_token_.IsValid())
return sequence_token_ == SequenceToken::GetForCurrentThread();
// SequenceChecker behaves as a ThreadChecker when it is not bound to a
// valid sequence token.
return thread_checker_.CalledOnValidThread();
SequenceToken sequence_token_;
// Used when |sequence_token_| is invalid.
ThreadCheckerImpl thread_checker_;
SequenceCheckerImpl::SequenceCheckerImpl() : core_(std::make_unique<Core>()) {}
SequenceCheckerImpl::~SequenceCheckerImpl() = default;
bool SequenceCheckerImpl::CalledOnValidSequence() const {
AutoLock auto_lock(lock_);
if (!core_)
core_ = std::make_unique<Core>();
return core_->CalledOnValidSequence();
void SequenceCheckerImpl::DetachFromSequence() {
AutoLock auto_lock(lock_);
} // namespace base