blob: 5d59c99c10716a44ad925d7f449f1bcda7bd87eb [file] [log] [blame]
* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
// Borrowed from Chromium's src/base/threading/
#include "webrtc/base/thread_checker_impl.h"
#include "webrtc/base/checks.h"
#if defined(WEBRTC_LINUX)
#include <sys/syscall.h>
namespace rtc {
PlatformThreadId CurrentThreadId() {
PlatformThreadId ret;
#if defined(WEBRTC_WIN)
ret = GetCurrentThreadId();
#elif defined(WEBRTC_POSIX)
#if defined(WEBRTC_MAC) || defined(WEBRTC_IOS)
ret = pthread_mach_thread_np(pthread_self());
#elif defined(WEBRTC_LINUX)
ret = syscall(__NR_gettid);
#elif defined(WEBRTC_ANDROID)
ret = gettid();
// Default implementation for nacl and solaris.
ret = reinterpret_cast<pid_t>(pthread_self());
#endif // defined(WEBRTC_POSIX)
return ret;
PlatformThreadRef CurrentThreadRef() {
#if defined(WEBRTC_WIN)
return GetCurrentThreadId();
#elif defined(WEBRTC_POSIX)
return pthread_self();
bool IsThreadRefEqual(const PlatformThreadRef& a, const PlatformThreadRef& b) {
#if defined(WEBRTC_WIN)
return a == b;
#elif defined(WEBRTC_POSIX)
return pthread_equal(a, b);
ThreadCheckerImpl::ThreadCheckerImpl() : valid_thread_(CurrentThreadRef()) {
ThreadCheckerImpl::~ThreadCheckerImpl() {
bool ThreadCheckerImpl::CalledOnValidThread() const {
const PlatformThreadRef current_thread = CurrentThreadRef();
CritScope scoped_lock(&lock_);
if (!valid_thread_) // Set if previously detached.
valid_thread_ = current_thread;
return IsThreadRefEqual(valid_thread_, current_thread);
void ThreadCheckerImpl::DetachFromThread() {
CritScope scoped_lock(&lock_);
valid_thread_ = 0;
} // namespace rtc