2c7d1b39b9
BUG=N/A R=andrew@webrtc.org, wu@webrtc.org Review URL: https://webrtc-codereview.appspot.com/12199004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
/*
|
|
* 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"
|
|
|
|
namespace rtc {
|
|
|
|
AsyncInvoker::AsyncInvoker() : destroying_(false) {}
|
|
|
|
AsyncInvoker::~AsyncInvoker() {
|
|
destroying_ = true;
|
|
SignalInvokerDestroyed();
|
|
// Messages for this need to be cleared *before* our destructor is complete.
|
|
MessageQueueManager::Clear(this);
|
|
}
|
|
|
|
void AsyncInvoker::OnMessage(Message* msg) {
|
|
// Get the AsyncClosure shared ptr from this message's data.
|
|
ScopedRefMessageData<AsyncClosure>* data =
|
|
static_cast<ScopedRefMessageData<AsyncClosure>*>(msg->pdata);
|
|
scoped_refptr<AsyncClosure> closure = data->data();
|
|
delete msg->pdata;
|
|
msg->pdata = NULL;
|
|
|
|
// Execute the closure and trigger the return message if needed.
|
|
closure->Execute();
|
|
}
|
|
|
|
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));
|
|
return;
|
|
}
|
|
|
|
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.
|
|
thread->Send(it->phandler,
|
|
it->message_id,
|
|
it->pdata);
|
|
}
|
|
}
|
|
|
|
void AsyncInvoker::DoInvoke(Thread* thread, AsyncClosure* closure,
|
|
uint32 id) {
|
|
if (destroying_) {
|
|
LOG(LS_WARNING) << "Tried to invoke while destroying the invoker.";
|
|
// Since this call transwers ownership of |closure|, we clean it up here.
|
|
delete closure;
|
|
return;
|
|
}
|
|
thread->Post(this, id, new ScopedRefMessageData<AsyncClosure>(closure));
|
|
}
|
|
|
|
NotifyingAsyncClosureBase::NotifyingAsyncClosureBase(AsyncInvoker* invoker,
|
|
Thread* calling_thread)
|
|
: invoker_(invoker), calling_thread_(calling_thread) {
|
|
calling_thread->SignalQueueDestroyed.connect(
|
|
this, &NotifyingAsyncClosureBase::CancelCallback);
|
|
invoker->SignalInvokerDestroyed.connect(
|
|
this, &NotifyingAsyncClosureBase::CancelCallback);
|
|
}
|
|
|
|
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
|