101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
/*
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Copyright (c) 2014, 2016 Oracle and/or its affiliates. All rights reserved.
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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 General Public License as published by
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the Free Software Foundation; version 2 of the License.
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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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef INSTANCE_CALLBACK_INCLUDED
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#define INSTANCE_CALLBACK_INCLUDED
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#include "i_callable.h"
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#include <cstddef> // NULL
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namespace Mysql{
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/**
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Instance method based callback.
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*/
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template<typename T_result, typename T_arg, typename T_class>
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class Instance_callback : public I_callable<T_result, T_arg>
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{
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typedef T_result (T_class::*Method)(T_arg);
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public:
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/**
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Creates new instance method callback.
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*/
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Instance_callback(T_class* instance, Method method);
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/**
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Invokes callback method on instance specified in constructor.
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*/
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T_result operator()(T_arg argument) const;
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protected:
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T_class* m_instance;
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private:
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Method m_method;
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};
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/**
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Instance method based callback. Owns T_class instance and destroys it when it
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dies.
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*/
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template<typename T_result, typename T_arg, typename T_class>
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class Instance_callback_own
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: public Instance_callback<T_result, T_arg, T_class>
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{
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typedef T_result (T_class::*Method)(T_arg);
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public:
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/**
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Creates new instance method callback.
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*/
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Instance_callback_own(T_class* instance, Method method);
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~Instance_callback_own();
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};
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template<typename T_result, typename T_arg, typename T_class>
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Instance_callback<T_result, T_arg, T_class>::
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Instance_callback(T_class* instance, Method method)
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: m_instance(instance), m_method(method)
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{}
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template<typename T_result, typename T_arg, typename T_class>
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T_result Instance_callback<T_result, T_arg, T_class>::operator()
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(T_arg argument) const
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{
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return (this->m_instance->*this->m_method)(argument);
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}
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template<typename T_result, typename T_arg, typename T_class>
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Instance_callback_own<T_result, T_arg, T_class>::
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Instance_callback_own(T_class* instance, Method method)
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: Instance_callback<T_result, T_arg, T_class>(instance, method)
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{}
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template<typename T_result, typename T_arg, typename T_class>
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Instance_callback_own<T_result, T_arg, T_class>::
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~Instance_callback_own()
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{
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delete this->m_instance;
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this->m_instance= NULL;
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}
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}
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#endif
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