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PriorityDelegate.h

//
// PriorityDelegate.h
//
// $Id: //poco/1.4/Foundation/include/Poco/PriorityDelegate.h#5 $
//
// Library: Foundation
// Package: Events
// Module:  PriorityDelegate
//
// Implementation of the PriorityDelegate template.
//
// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Foundation_PriorityDelegate_INCLUDED
#define Foundation_PriorityDelegate_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/AbstractPriorityDelegate.h"
#include "Poco/PriorityExpire.h"
#include "Poco/FunctionPriorityDelegate.h"
#include "Poco/Mutex.h"


namespace Poco {


template <class TObj, class TArgs, bool useSender = true> 
00054 class PriorityDelegate: public AbstractPriorityDelegate<TArgs>
{
public:
      typedef void (TObj::*NotifyMethod)(const void*, TArgs&);

      PriorityDelegate(TObj* obj, NotifyMethod method, int prio):
            AbstractPriorityDelegate<TArgs>(prio),
            _receiverObject(obj),
            _receiverMethod(method)
      {
      }
      
      PriorityDelegate(const PriorityDelegate& delegate):
            AbstractPriorityDelegate<TArgs>(delegate),
            _receiverObject(delegate._receiverObject),
            _receiverMethod(delegate._receiverMethod)
      {
      }
      
      PriorityDelegate& operator = (const PriorityDelegate& delegate)
      {
            if (&delegate != this)
            {
                  this->_pTarget        = delegate._pTarget;
                  this->_receiverObject = delegate._receiverObject;
                  this->_receiverMethod = delegate._receiverMethod;
                  this->_priority       = delegate._priority;
            }
            return *this;
      }

      ~PriorityDelegate()
      {
      }

      bool notify(const void* sender, TArgs& arguments)
      {
            Mutex::ScopedLock lock(_mutex);
            if (_receiverObject)
            {
                  (_receiverObject->*_receiverMethod)(sender, arguments);
                  return true; 
            }
            else return false;
      }

00100       bool equals(const AbstractDelegate<TArgs>& other) const
      {
            const PriorityDelegate* pOtherDelegate = dynamic_cast<const PriorityDelegate*>(other.unwrap());
            return pOtherDelegate && this->priority() == pOtherDelegate->priority() && _receiverObject == pOtherDelegate->_receiverObject && _receiverMethod == pOtherDelegate->_receiverMethod;
      }

00106       AbstractDelegate<TArgs>* clone() const
      {
            return new PriorityDelegate(*this);
      }

00111       void disable()
      {
            Mutex::ScopedLock lock(_mutex);
            _receiverObject = 0;
      }
      
protected:
      TObj*        _receiverObject;
      NotifyMethod _receiverMethod;
      Mutex _mutex;

private:
      PriorityDelegate();
};


template <class TObj, class TArgs> 
00128 class PriorityDelegate<TObj, TArgs, false>: public AbstractPriorityDelegate<TArgs>
{
public:
      typedef void (TObj::*NotifyMethod)(TArgs&);

      PriorityDelegate(TObj* obj, NotifyMethod method, int prio):
            AbstractPriorityDelegate<TArgs>(prio),
            _receiverObject(obj),
            _receiverMethod(method)
      {
      }
      
      PriorityDelegate(const PriorityDelegate& delegate):
            AbstractPriorityDelegate<TArgs>(delegate),
            _receiverObject(delegate._receiverObject),
            _receiverMethod(delegate._receiverMethod)
      {
      }
      
      PriorityDelegate& operator = (const PriorityDelegate& delegate)
      {
            if (&delegate != this)
            {
                  this->_pTarget        = delegate._pTarget;
                  this->_receiverObject = delegate._receiverObject;
                  this->_receiverMethod = delegate._receiverMethod;
                  this->_priority       = delegate._priority;
            }
            return *this;
      }

      ~PriorityDelegate()
      {
      }

      bool notify(const void* sender, TArgs& arguments)
      {
            Mutex::ScopedLock lock(_mutex);
            if (_receiverObject)
            {
                  (_receiverObject->*_receiverMethod)(arguments);
                  return true;
            }
            return false;
      }

00174       bool equals(const AbstractDelegate<TArgs>& other) const
      {
            const PriorityDelegate* pOtherDelegate = dynamic_cast<const PriorityDelegate*>(other.unwrap());
            return pOtherDelegate && this->priority() == pOtherDelegate->priority() && _receiverObject == pOtherDelegate->_receiverObject && _receiverMethod == pOtherDelegate->_receiverMethod;
      }

00180       AbstractDelegate<TArgs>* clone() const
      {
            return new PriorityDelegate(*this);
      }

00185       void disable()
      {
            Mutex::ScopedLock lock(_mutex);
            _receiverObject = 0;
      }

protected:
      TObj*        _receiverObject;
      NotifyMethod _receiverMethod;
      Mutex _mutex;

private:
      PriorityDelegate();
};


template <class TObj, class TArgs>
static PriorityDelegate<TObj, TArgs, true> priorityDelegate(TObj* pObj, void (TObj::*NotifyMethod)(const void*, TArgs&), int prio)
{
      return PriorityDelegate<TObj, TArgs, true>(pObj, NotifyMethod, prio);
}


template <class TObj, class TArgs>
static PriorityDelegate<TObj, TArgs, false> priorityDelegate(TObj* pObj, void (TObj::*NotifyMethod)(TArgs&), int prio)
{
      return PriorityDelegate<TObj, TArgs, false>(pObj, NotifyMethod, prio);
}


template <class TObj, class TArgs>
static PriorityExpire<TArgs> priorityDelegate(TObj* pObj, void (TObj::*NotifyMethod)(const void*, TArgs&), int prio, Timestamp::TimeDiff expireMilliSec)
{
      return PriorityExpire<TArgs>(PriorityDelegate<TObj, TArgs, true>(pObj, NotifyMethod, prio), expireMilliSec);
}


template <class TObj, class TArgs>
static PriorityExpire<TArgs> priorityDelegate(TObj* pObj, void (TObj::*NotifyMethod)(TArgs&), int prio, Timestamp::TimeDiff expireMilliSec)
{
      return PriorityExpire<TArgs>(PriorityDelegate<TObj, TArgs, false>(pObj, NotifyMethod, prio), expireMilliSec);
}


template <class TArgs>
static PriorityExpire<TArgs> priorityDelegate(void (*NotifyMethod)(const void*, TArgs&), int prio, Timestamp::TimeDiff expireMilliSec)
{
      return PriorityExpire<TArgs>(FunctionPriorityDelegate<TArgs, true, true>(NotifyMethod, prio), expireMilliSec);
}


template <class TArgs>
static PriorityExpire<TArgs> priorityDelegate(void (*NotifyMethod)(void*, TArgs&), int prio, Timestamp::TimeDiff expireMilliSec)
{
      return PriorityExpire<TArgs>(FunctionPriorityDelegate<TArgs, true, false>(NotifyMethod, prio), expireMilliSec);
}


template <class TArgs>
static PriorityExpire<TArgs> priorityDelegate(void (*NotifyMethod)(TArgs&), int prio, Timestamp::TimeDiff expireMilliSec)
{
      return PriorityExpire<TArgs>(FunctionPriorityDelegate<TArgs, false>(NotifyMethod, prio), expireMilliSec);
}


template <class TArgs>
static FunctionPriorityDelegate<TArgs, true, true> priorityDelegate(void (*NotifyMethod)(const void*, TArgs&), int prio)
{
      return FunctionPriorityDelegate<TArgs, true, true>(NotifyMethod, prio);
}


template <class TArgs>
static FunctionPriorityDelegate<TArgs, true, false> priorityDelegate(void (*NotifyMethod)(void*, TArgs&), int prio)
{
      return FunctionPriorityDelegate<TArgs, true, false>(NotifyMethod, prio);
}


template <class TArgs>
static FunctionPriorityDelegate<TArgs, false> priorityDelegate(void (*NotifyMethod)(TArgs&), int prio)
{
      return FunctionPriorityDelegate<TArgs, false>(NotifyMethod, prio);
}


} // namespace Poco


#endif // Foundation_PriorityDelegate_INCLUDED

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