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FunctionPriorityDelegate.h

//
// FunctionPriorityDelegate.h
//
// $Id: //poco/1.3/Foundation/include/Poco/FunctionPriorityDelegate.h#1 $
//
// Library: Foundation
// Package: Events
// Module:  FunctionPriorityDelegate
//
// Implementation of the FunctionPriorityDelegate template.
//
// Copyright (c) 2006, 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_FunctionPriorityDelegate_INCLUDED
#define  Foundation_FunctionPriorityDelegate_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/AbstractPriorityDelegate.h"


namespace Poco {


template <class TArgs, bool useSender = true, bool senderIsConst = true> 
00051 class FunctionPriorityDelegate: public AbstractPriorityDelegate<TArgs>
      /// Wraps a C style function (or a C++ static fucntion) to be used as
      /// a priority delegate
{
public:
      typedef void (*NotifyMethod)(const void*, TArgs&);

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

      ~FunctionPriorityDelegate()
      {
      }

      bool notify(const void* sender, TArgs& arguments)
      {
            (*_receiverMethod)(sender, arguments);
            return true; // per default the delegate never expires
      }

00091       AbstractPriorityDelegate<TArgs>* clone() const
      {
            return new FunctionPriorityDelegate(*this);
      }

protected:
      NotifyMethod _receiverMethod;

private:
      FunctionPriorityDelegate();
};


template <class TArgs> 
00105 class FunctionPriorityDelegate<TArgs, true, false>: public AbstractPriorityDelegate<TArgs>
{
public:
      typedef void (*NotifyMethod)(void*, TArgs&);

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

      ~FunctionPriorityDelegate()
      {
      }

      bool notify(const void* sender, TArgs& arguments)
      {
            (*_receiverMethod)(const_cast<void*>(sender), arguments);
            return true; // per default the delegate never expires
      }

00143       AbstractPriorityDelegate<TArgs>* clone() const
      {
            return new FunctionPriorityDelegate(*this);
      }

protected:
      NotifyMethod _receiverMethod;

private:
      FunctionPriorityDelegate();
};



template <class TArgs> 
00158 class FunctionPriorityDelegate<TArgs, false>: public AbstractPriorityDelegate<TArgs>
{
public:
      typedef void (*NotifyMethod)(TArgs&);

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

      ~FunctionPriorityDelegate()
      {
      }

      bool notify(const void* sender, TArgs& arguments)
      {
            (*_receiverMethod)(arguments);
            return true; // per default the delegate never expires
      }

00196       AbstractPriorityDelegate<TArgs>* clone() const
      {
            return new FunctionPriorityDelegate(*this);
      }

protected:
      NotifyMethod _receiverMethod;

private:
      FunctionPriorityDelegate();
};


} // namespace Poco


#endif // Foundation_FunctionPriorityDelegate_INCLUDED

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