1/*
2 *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11// Borrowed from Chromium's src/base/threading/thread_checker_impl.cc.
12
13#include "webrtc/base/thread_checker_impl.h"
14
15#include "webrtc/base/thread.h"
16
17namespace rtc {
18
19ThreadCheckerImpl::ThreadCheckerImpl()
20    : valid_thread_() {
21  EnsureThreadIdAssigned();
22}
23
24ThreadCheckerImpl::~ThreadCheckerImpl() {
25}
26
27bool ThreadCheckerImpl::CalledOnValidThread() const {
28  CritScope scoped_lock(&lock_);
29  EnsureThreadIdAssigned();
30  return valid_thread_->IsCurrent();
31}
32
33void ThreadCheckerImpl::DetachFromThread() {
34  CritScope scoped_lock(&lock_);
35  valid_thread_ = NULL;
36}
37
38void ThreadCheckerImpl::EnsureThreadIdAssigned() const {
39  if (!valid_thread_) {
40    valid_thread_ = Thread::Current();
41  }
42}
43
44}  // namespace rtc
45