blob: 35ce2fb12814a60a2e5e976d750ea1fb30f95c07 [file] [log] [blame]
* Copyright 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.
#include "webrtc/base/asyncinvoker.h"
#include "webrtc/base/logging.h"
namespace rtc {
AsyncInvoker::AsyncInvoker() : destroying_(false) {}
AsyncInvoker::~AsyncInvoker() {
destroying_ = true;
// Messages for this need to be cleared *before* our destructor is complete.
void AsyncInvoker::OnMessage(Message* msg) {
// Get the AsyncClosure shared ptr from this message's data.
ScopedRefMessageData<AsyncClosure>* data =
scoped_refptr<AsyncClosure> closure = data->data();
delete msg->pdata;
msg->pdata = NULL;
// Execute the closure and trigger the return message if needed.
void AsyncInvoker::Flush(Thread* thread, uint32 id /*= MQID_ANY*/) {
if (destroying_) return;
// Run this on |thread| to reduce the number of context switches.
if (Thread::Current() != thread) {
thread->Invoke<void>(Bind(&AsyncInvoker::Flush, this, thread, id));
MessageList removed;
thread->Clear(this, id, &removed);
for (MessageList::iterator it = removed.begin(); it != removed.end(); ++it) {
// This message was pending on this thread, so run it now.
void AsyncInvoker::DoInvoke(Thread* thread,
const scoped_refptr<AsyncClosure>& closure,
uint32 id) {
if (destroying_) {
LOG(LS_WARNING) << "Tried to invoke while destroying the invoker.";
thread->Post(this, id, new ScopedRefMessageData<AsyncClosure>(closure));
NotifyingAsyncClosureBase::NotifyingAsyncClosureBase(AsyncInvoker* invoker,
Thread* calling_thread)
: invoker_(invoker), calling_thread_(calling_thread) {
this, &NotifyingAsyncClosureBase::CancelCallback);
this, &NotifyingAsyncClosureBase::CancelCallback);
NotifyingAsyncClosureBase::~NotifyingAsyncClosureBase() {
void NotifyingAsyncClosureBase::TriggerCallback() {
CritScope cs(&crit_);
if (!CallbackCanceled() && !callback_.empty()) {
invoker_->AsyncInvoke<void>(calling_thread_, callback_);
void NotifyingAsyncClosureBase::CancelCallback() {
// If the callback is triggering when this is called, block the
// destructor of the dying object here by waiting until the callback
// is done triggering.
CritScope cs(&crit_);
// calling_thread_ == NULL means do not trigger the callback.
calling_thread_ = NULL;
} // namespace rtc