mirror of
https://github.com/id-Software/DOOM-3-BFG.git
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189 lines
5.1 KiB
C++
189 lines
5.1 KiB
C++
/*
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===========================================================================
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Doom 3 BFG Edition GPL Source Code
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Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
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Doom 3 BFG Edition Source Code 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, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 BFG Edition Source Code 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 Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#ifndef __CALLBACK_H__
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#define __CALLBACK_H__
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/*
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================================================================================================
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This file defines a set of template functors for generating callbacks, specifically
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the OnChange handlers in the CVar system.
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================================================================================================
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*/
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/*
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================================================
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idCallback
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================================================
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*/
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class idCallback
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{
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public:
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virtual ~idCallback() {}
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virtual void Call() = 0;
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virtual idCallback* Clone() const = 0;
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};
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/*
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================================================
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idCallbackStatic
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Callback class that forwards the call to a c-style function
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================================================
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*/
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class idCallbackStatic : public idCallback
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{
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public:
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idCallbackStatic( void ( *f )() )
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{
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this->f = f;
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}
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void Call()
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{
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f();
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}
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idCallback* Clone() const
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{
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//idScopedGlobalHeap everythingHereGoesInTheGlobalHeap;
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return new( TAG_FUNC_CALLBACK ) idCallbackStatic( f );
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}
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private:
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void ( *f )();
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};
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/*
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================================================
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idCallbackBindMem
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Callback class that forwards the call to a member function
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================================================
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*/
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template< class T >
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class idCallbackBindMem : public idCallback
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{
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public:
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idCallbackBindMem( T* t, void ( T::*f )() )
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{
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this->t = t;
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this->f = f;
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}
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void Call()
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{
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( t->*f )();
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}
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idCallback* Clone() const
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{
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return new( TAG_FUNC_CALLBACK ) idCallbackBindMem( t, f );
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}
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private:
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T* t;
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void ( T::*f )();
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};
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/*
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================================================
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idCallbackBindMemArg1
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Callback class that forwards the call to a member function with an additional constant parameter
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================================================
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*/
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template< class T, typename A1 >
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class idCallbackBindMemArg1 : public idCallback
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{
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public:
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idCallbackBindMemArg1( T* t_, void ( T::*f_ )( A1 ), A1 a1_ ) :
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t( t_ ),
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f( f_ ),
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a1( a1_ )
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{
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}
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void Call()
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{
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( t->*f )( a1 );
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}
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idCallback* Clone() const
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{
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return new( TAG_FUNC_CALLBACK ) idCallbackBindMemArg1( t, f, a1 );
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}
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private:
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T* t;
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void ( T::*f )( A1 );
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A1 a1;
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// hack to get to compile on the 360 with reference arguments
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// with this on the PC, the MakeCallback function fails compilation because it's returning a copy
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// therefore, the Arg1 callbacks can't have arguments that are references
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//DISALLOW_COPY_AND_ASSIGN( idCallbackBindMemArg1 );
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};
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/*
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================================================================================================
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These are needed because we can't derive the type of an object from the type passed to the
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constructor. If it weren't for these, we'd have to manually specify the type:
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idCallbackBindMem<idFoo>( this, &idFoo::MyFunction );
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becomes:
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MakeCallback( this, &idFoo::MyFunction );
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================================================================================================
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*/
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/*
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========================
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MakeCallback
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========================
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*/
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ID_INLINE_EXTERN idCallbackStatic MakeCallback( void ( *f )( void ) )
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{
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return idCallbackStatic( f );
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}
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/*
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========================
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MakeCallback
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========================
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*/
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template < class T >
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ID_INLINE_EXTERN idCallbackBindMem<T> MakeCallback( T* t, void ( T::*f )( void ) )
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{
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return idCallbackBindMem<T>( t, f );
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}
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/*
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========================
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MakeCallback
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========================
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*/
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template < class T, typename A1 >
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ID_INLINE_EXTERN idCallbackBindMemArg1<T, A1> MakeCallback( T* t, void ( T::*f )( A1 ), A1 a1 )
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{
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return idCallbackBindMemArg1<T, A1>( t, f, a1 );
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}
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#endif // __CALLBACK_H__
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