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318 lines
10 KiB
C
318 lines
10 KiB
C
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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef NLQT_CALLBACK_H
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#define NLQT_CALLBACK_H
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#include <nel/misc/types_nl.h>
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// STL includes
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// NeL includes
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#include <nel/misc/debug.h>
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// Project includes
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namespace NLQT {
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#define NLQT_CALLBACK_TEMPLATE \
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/** \
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* \brief NLQT_CALLBACK_ARGS_CLASS \
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* \date 2009-03-03 18:09GMT \
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* \author Jan Boon (Kaetemi) \
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* Awesome callback template \
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*/ \
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template<typename TReturn NLQT_CALLBACK_ARGS_TYPENAME> \
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class NLQT_CALLBACK_ARGS_CLASS \
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{ \
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/* Very simple reference counting callback base */ \
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class CCallbackBase \
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{ \
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public: \
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CCallbackBase() : m_RefCount(0) \
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{ \
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\
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} \
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\
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virtual ~CCallbackBase() \
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{ \
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nlassert(!m_RefCount); \
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} \
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\
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void refAdd() \
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{ \
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++m_RefCount; \
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} \
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\
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void refRemove() \
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{ \
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--m_RefCount; \
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if (!m_RefCount) \
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delete this; \
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} \
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\
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virtual TReturn callback(NLQT_CALLBACK_ARGS_DECL) = 0; \
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\
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virtual bool equals(const CCallbackBase *callbackBase) = 0; \
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\
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/* disable copy */ \
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CCallbackBase(const CCallbackBase &); \
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CCallbackBase &operator=(const CCallbackBase &); \
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\
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private: \
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uint m_RefCount; \
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}; \
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\
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typedef TReturn TCallbackFunction(NLQT_CALLBACK_ARGS_DECL); \
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class CCallbackFunction : public CCallbackBase \
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{ \
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public: \
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CCallbackFunction(TCallbackFunction *callbackFunction) : m_CallbackFunction(callbackFunction) \
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{ \
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nlassert(m_CallbackFunction); \
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} \
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\
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virtual ~CCallbackFunction() \
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{ \
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m_CallbackFunction = NULL; \
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} \
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\
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virtual TReturn callback(NLQT_CALLBACK_ARGS_DECL) \
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{ \
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return m_CallbackFunction(NLQT_CALLBACK_ARGS_IMPL); \
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} \
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\
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virtual bool equals(const CCallbackBase *callbackBase) \
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{ \
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const CCallbackFunction *callbackFunction = \
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dynamic_cast<const CCallbackFunction *>(callbackBase); \
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if (!callbackFunction) return false; \
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return m_CallbackFunction == callbackFunction->m_CallbackFunction; \
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} \
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\
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private: \
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TCallbackFunction *m_CallbackFunction; \
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}; \
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\
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template<typename TClass> \
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class CCallbackMethod : public CCallbackBase \
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{ \
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typedef TReturn (TClass::*TCallbackMethod)(NLQT_CALLBACK_ARGS_DECL); \
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public: \
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CCallbackMethod(TClass *callbackObject, TCallbackMethod callbackMethod) : m_CallbackObject(callbackObject), m_CallbackMethod(callbackMethod) \
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{ \
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nlassert(m_CallbackObject); \
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nlassert(m_CallbackMethod); \
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} \
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\
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virtual ~CCallbackMethod() \
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{ \
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m_CallbackObject = NULL; \
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m_CallbackMethod = NULL; \
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} \
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\
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virtual TReturn callback(NLQT_CALLBACK_ARGS_DECL) \
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{ \
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return (m_CallbackObject->*m_CallbackMethod)(NLQT_CALLBACK_ARGS_IMPL); \
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} \
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\
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virtual bool equals(const CCallbackBase *callbackBase) \
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{ \
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const CCallbackMethod *callbackMethod = \
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dynamic_cast<const CCallbackMethod *>(callbackBase); \
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if (!callbackMethod) return false; \
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return m_CallbackObject == callbackMethod->m_CallbackObject \
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&& m_CallbackMethod == callbackMethod->m_CallbackMethod; \
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} \
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\
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private: \
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TClass *m_CallbackObject; \
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TCallbackMethod m_CallbackMethod; \
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}; \
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\
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public: \
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CCallback() : m_CallbackBase(NULL) \
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{ \
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\
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} \
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\
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CCallback(TCallbackFunction *callbackFunction) : m_CallbackBase(new CCallbackFunction(callbackFunction)) \
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{ \
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nlassert(m_CallbackBase); \
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m_CallbackBase->refAdd(); \
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} \
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\
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template<typename TClass> \
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CCallback(TClass *callbackObject, TReturn (TClass::*callbackMethod)(NLQT_CALLBACK_ARGS_DECL)) : m_CallbackBase(new CCallbackMethod<TClass>(callbackObject, callbackMethod)) \
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{ \
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nlassert(m_CallbackBase); \
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m_CallbackBase->refAdd(); \
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} \
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\
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CCallback(const CCallback &callback) \
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{ \
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m_CallbackBase = callback.m_CallbackBase; \
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if (m_CallbackBase) \
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m_CallbackBase->refAdd(); \
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} \
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\
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CCallback &operator=(const CCallback &callback) \
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{ \
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if (m_CallbackBase != callback.m_CallbackBase) \
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{ \
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if (m_CallbackBase) \
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m_CallbackBase->refRemove(); \
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m_CallbackBase = callback.m_CallbackBase; \
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if (m_CallbackBase) \
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m_CallbackBase->refAdd(); \
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} \
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return *this; \
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} \
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\
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~CCallback() \
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{ \
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if (m_CallbackBase) \
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{ \
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m_CallbackBase->refRemove(); \
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m_CallbackBase = NULL; \
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} \
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} \
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\
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TReturn callback(NLQT_CALLBACK_ARGS_DECL) \
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{ \
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nlassert(m_CallbackBase); \
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return m_CallbackBase->callback(NLQT_CALLBACK_ARGS_IMPL); \
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} \
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\
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TReturn operator()(NLQT_CALLBACK_ARGS_DECL) \
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{ \
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nlassert(m_CallbackBase); \
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return m_CallbackBase->callback(NLQT_CALLBACK_ARGS_IMPL); \
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} \
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\
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bool valid() const \
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{ \
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return m_CallbackBase != NULL; \
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} \
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\
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operator bool() const \
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{ \
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return m_CallbackBase != NULL; \
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} \
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\
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bool operator==(const CCallback &callback) \
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{ \
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return m_CallbackBase->equals(callback.m_CallbackBase); \
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} \
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\
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private: \
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CCallbackBase *m_CallbackBase; \
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\
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}; /* class CCallback */ \
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template<typename TReturn, typename TArgsA = void, typename TArgsB = void, typename TArgsC = void, typename TArgsD = void, typename TArgsE = void, typename TArgsF = void, typename TArgsG = void, typename TDummy = void>
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class CCallback;
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#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, void, void, void, void, void, void, void, void>
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#define NLQT_CALLBACK_ARGS_TYPENAME
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#define NLQT_CALLBACK_ARGS_DECL
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#define NLQT_CALLBACK_ARGS_IMPL
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NLQT_CALLBACK_TEMPLATE
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#undef NLQT_CALLBACK_ARGS_CLASS
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#undef NLQT_CALLBACK_ARGS_TYPENAME
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#undef NLQT_CALLBACK_ARGS_DECL
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#undef NLQT_CALLBACK_ARGS_IMPL
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#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, void, void, void, void, void, void, void>
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#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA
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#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA
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#define NLQT_CALLBACK_ARGS_IMPL argsA
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NLQT_CALLBACK_TEMPLATE
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#undef NLQT_CALLBACK_ARGS_CLASS
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#undef NLQT_CALLBACK_ARGS_TYPENAME
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#undef NLQT_CALLBACK_ARGS_DECL
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#undef NLQT_CALLBACK_ARGS_IMPL
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#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, void, void, void, void, void, void>
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#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB
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#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB
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#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB
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NLQT_CALLBACK_TEMPLATE
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#undef NLQT_CALLBACK_ARGS_CLASS
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#undef NLQT_CALLBACK_ARGS_TYPENAME
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#undef NLQT_CALLBACK_ARGS_DECL
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#undef NLQT_CALLBACK_ARGS_IMPL
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#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, void, void, void, void, void>
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#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC
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#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC
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#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC
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NLQT_CALLBACK_TEMPLATE
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#undef NLQT_CALLBACK_ARGS_CLASS
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#undef NLQT_CALLBACK_ARGS_TYPENAME
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#undef NLQT_CALLBACK_ARGS_DECL
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#undef NLQT_CALLBACK_ARGS_IMPL
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#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, TArgsD, void, void, void, void>
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#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC, typename TArgsD
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#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC, TArgsD argsD
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#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC, argsD
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NLQT_CALLBACK_TEMPLATE
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#undef NLQT_CALLBACK_ARGS_CLASS
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#undef NLQT_CALLBACK_ARGS_TYPENAME
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#undef NLQT_CALLBACK_ARGS_DECL
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#undef NLQT_CALLBACK_ARGS_IMPL
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#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, TArgsD, TArgsE, void, void, void>
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#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC, typename TArgsD, typename TArgsE
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#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC, TArgsD argsD, TArgsE argsE
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#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC, argsD, argsE
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NLQT_CALLBACK_TEMPLATE
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#undef NLQT_CALLBACK_ARGS_CLASS
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#undef NLQT_CALLBACK_ARGS_TYPENAME
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#undef NLQT_CALLBACK_ARGS_DECL
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#undef NLQT_CALLBACK_ARGS_IMPL
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#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, TArgsD, TArgsE, TArgsF, void, void>
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#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC, typename TArgsD, typename TArgsE, typename TArgsF
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#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC, TArgsD argsD, TArgsE argsE, TArgsF argsF
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#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC, argsD, argsE, argsF
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NLQT_CALLBACK_TEMPLATE
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#undef NLQT_CALLBACK_ARGS_CLASS
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#undef NLQT_CALLBACK_ARGS_TYPENAME
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#undef NLQT_CALLBACK_ARGS_DECL
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#undef NLQT_CALLBACK_ARGS_IMPL
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#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, TArgsD, TArgsE, TArgsF, TArgsG, void>
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#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC, typename TArgsD, typename TArgsE, typename TArgsF, typename TArgsG
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#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC, TArgsD argsD, TArgsE argsE, TArgsF argsF, TArgsG argsG
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#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC, argsD, argsE, argsF, argsG
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NLQT_CALLBACK_TEMPLATE
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#undef NLQT_CALLBACK_ARGS_CLASS
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#undef NLQT_CALLBACK_ARGS_TYPENAME
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#undef NLQT_CALLBACK_ARGS_DECL
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#undef NLQT_CALLBACK_ARGS_IMPL
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#undef NLQT_CALLBACK_ARGS_CLASSNAME
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#undef NLQT_CALLBACK_TEMPLATE
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typedef CCallback<void> CEmptyCallback;
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} /* namespace NLQT */
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#endif /* #ifndef NLQT_CALLBACK_H */
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/* end of file */
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