86 lines
3.6 KiB
C++
86 lines
3.6 KiB
C++
#pragma once
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/****************************************************************************
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Copyright (c) 2009, Radon Labs GmbH
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Copyright (c) 2011-2013,WebJet Business Division,CYOU
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http://www.genesis-3d.com.cn
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "threading/thread.h"
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#include "threading/event.h"
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#include "threading/criticalsection.h"
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#include "messaging/handler.h"
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#include "messaging/message.h"
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//------------------------------------------------------------------------------
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namespace Messaging
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{
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class HandlerThreadBase : public Threading::Thread
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{
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__DeclareClass(HandlerThreadBase);
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public:
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/// constructor
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HandlerThreadBase();
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/// attach a message handler
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void AttachHandler(const GPtr<Handler>& h);
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/// dynamically remove a message handler
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void RemoveHandler(const GPtr<Handler>& h);
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/// clear all attached message handlers
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void ClearHandlers();
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/// wait until handlers have been opened
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void WaitForHandlersOpened();
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/// add a message to be handled (override in subclass!)
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virtual void AddMessage(const GPtr<Message>& msg);
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/// cancel a pending message (override in subclass!)
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virtual void CancelMessage(const GPtr<Message>& msg);
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/// wait for message to be handled (optionally override in subclass!)
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virtual void WaitForMessage(const GPtr<Message>& msg);
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protected:
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/// open message handlers
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void ThreadOpenHandlers();
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/// close message handlers
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void ThreadCloseHandlers();
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/// open dynamically added handlers, and call DoWork() on all attached handlers
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void ThreadUpdateHandlers();
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/// update deferred messages, return true if at least one message has been handled
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bool ThreadUpdateDeferredMessages();
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/// clear leftover deferred messages
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void ThreadDiscardDeferredMessages();
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/// handle messages in array, return true if at least one message has been handled
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bool ThreadHandleMessages(const Util::Array<GPtr<Message> >& msgArray);
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/// handle a single message without deferred support, return if message has been handled
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bool ThreadHandleSingleMessage(const GPtr<Message>& msg);
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/// signal message handled event (only call if at least one message has been handled)
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void ThreadSignalMessageHandled();
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Threading::Event msgHandledEvent;
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Threading::Event handlersOpenedEvent;
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Threading::CriticalSection handlersCritSect;
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Util::Array<GPtr<Handler> > handlers;
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Util::Array<GPtr<Message> > deferredMessages;
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};
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} // namespace Messaging
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//------------------------------------------------------------------------------
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