thread_checker_impl.cc revision dc0f95d653279beabeb9817299e2902918ba123e 
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#include "base/threading/thread_checker_impl.h"
6
7namespace base {
8
9ThreadCheckerImpl::ThreadCheckerImpl()
10    : valid_thread_id_(kInvalidThreadId) {
11  EnsureThreadIdAssigned();
12}
13
14ThreadCheckerImpl::~ThreadCheckerImpl() {}
15
16bool ThreadCheckerImpl::CalledOnValidThread() const {
17  EnsureThreadIdAssigned();
18  AutoLock auto_lock(lock_);
19  return valid_thread_id_ == PlatformThread::CurrentId();
20}
21
22void ThreadCheckerImpl::DetachFromThread() {
23  AutoLock auto_lock(lock_);
24  valid_thread_id_ = kInvalidThreadId;
25}
26
27void ThreadCheckerImpl::EnsureThreadIdAssigned() const {
28  AutoLock auto_lock(lock_);
29  if (valid_thread_id_ != kInvalidThreadId)
30    return;
31  valid_thread_id_ = PlatformThread::CurrentId();
32}
33
34}  // namespace base
35