b8c254abd6
git-svn-id: http://webrtc.googlecode.com/svn/trunk@5555 4adac7df-926f-26a2-2b94-8c16560cd09d
109 lines
4.0 KiB
C++
109 lines
4.0 KiB
C++
/*
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* libjingle
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* Copyright 2014 Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "talk/base/asyncinvoker.h"
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namespace talk_base {
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AsyncInvoker::AsyncInvoker() : destroying_(false) {}
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AsyncInvoker::~AsyncInvoker() {
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destroying_ = true;
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SignalInvokerDestroyed();
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// Messages for this need to be cleared *before* our destructor is complete.
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MessageQueueManager::Clear(this);
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}
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void AsyncInvoker::OnMessage(Message* msg) {
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// Get the AsyncClosure shared ptr from this message's data.
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ScopedRefMessageData<AsyncClosure>* data =
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static_cast<ScopedRefMessageData<AsyncClosure>*>(msg->pdata);
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scoped_refptr<AsyncClosure> closure = data->data();
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delete msg->pdata;
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msg->pdata = NULL;
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// Execute the closure and trigger the return message if needed.
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closure->Execute();
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}
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void AsyncInvoker::Flush(Thread* thread, uint32 id /*= MQID_ANY*/) {
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if (destroying_) return;
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// Run this on |thread| to reduce the number of context switches.
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if (Thread::Current() != thread) {
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thread->Invoke<void>(Bind(&AsyncInvoker::Flush, this, thread, id));
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return;
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}
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MessageList removed;
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thread->Clear(this, id, &removed);
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for (MessageList::iterator it = removed.begin(); it != removed.end(); ++it) {
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// This message was pending on this thread, so run it now.
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thread->Send(it->phandler,
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it->message_id,
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it->pdata);
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}
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}
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void AsyncInvoker::DoInvoke(Thread* thread, AsyncClosure* closure,
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uint32 id) {
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if (destroying_) {
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LOG(LS_WARNING) << "Tried to invoke while destroying the invoker.";
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// Since this call transwers ownership of |closure|, we clean it up here.
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delete closure;
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return;
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}
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thread->Post(this, id, new ScopedRefMessageData<AsyncClosure>(closure));
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}
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NotifyingAsyncClosureBase::NotifyingAsyncClosureBase(AsyncInvoker* invoker,
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Thread* calling_thread)
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: invoker_(invoker), calling_thread_(calling_thread) {
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calling_thread->SignalQueueDestroyed.connect(
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this, &NotifyingAsyncClosureBase::CancelCallback);
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invoker->SignalInvokerDestroyed.connect(
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this, &NotifyingAsyncClosureBase::CancelCallback);
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}
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void NotifyingAsyncClosureBase::TriggerCallback() {
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CritScope cs(&crit_);
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if (!CallbackCanceled() && !callback_.empty()) {
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invoker_->AsyncInvoke<void>(calling_thread_, callback_);
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}
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}
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void NotifyingAsyncClosureBase::CancelCallback() {
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// If the callback is triggering when this is called, block the
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// destructor of the dying object here by waiting until the callback
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// is done triggering.
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CritScope cs(&crit_);
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// calling_thread_ == NULL means do not trigger the callback.
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calling_thread_ = NULL;
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}
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} // namespace talk_base
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