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ceb07280cf
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182 lines
4.9 KiB
C++
182 lines
4.9 KiB
C++
/*
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** dobject.h
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2008 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#ifndef __DOBJECT_H__
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#define __DOBJECT_H__
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#if 0
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#include <stdlib.h>
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struct PClass;
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#define RUNTIME_TYPE(object) (object->GetClass()) // Passed an object, returns the type of that object
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#define RUNTIME_CLASS(cls) (&cls::_StaticType) // Passed a class name, returns a PClass representing that class
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#define NATIVE_TYPE(object) (object->StaticType()) // Passed an object, returns the type of the C++ class representing the object
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struct ClassReg
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{
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PClass *MyClass;
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const char *Name;
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PClass *ParentType;
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unsigned int SizeOf;
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const size_t *Pointers;
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void (*ConstructNative)(void *);
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void RegisterClass() const;
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};
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enum EInPlace { EC_InPlace };
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#define DECLARE_ABSTRACT_CLASS(cls,parent) \
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public: \
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static PClass _StaticType; \
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virtual PClass *StaticType() const { return &_StaticType; } \
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static ClassReg RegistrationInfo, *RegistrationInfoPtr; \
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private: \
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typedef parent Super; \
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typedef cls ThisClass;
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#define DECLARE_CLASS(cls,parent) \
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DECLARE_ABSTRACT_CLASS(cls,parent) \
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private: static void InPlaceConstructor (void *mem);
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#if defined(_MSC_VER)
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# pragma data_seg(".creg$u")
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# pragma data_seg()
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# define _DECLARE_TI(cls) __declspec(allocate(".creg$u")) ClassReg *cls::RegistrationInfoPtr = &cls::RegistrationInfo;
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#else
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# define _DECLARE_TI(cls) ClassReg *cls::RegistrationInfoPtr __attribute__((section(SECTION_CREG))) = &cls::RegistrationInfo;
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#endif
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#define _IMP_PCLASS(cls,ptrs,create) \
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PClass cls::_StaticType; \
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ClassReg cls::RegistrationInfo = {\
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RUNTIME_CLASS(cls), \
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#cls, \
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RUNTIME_CLASS(cls::Super), \
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sizeof(cls), \
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ptrs, \
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create }; \
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_DECLARE_TI(cls)
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#define _IMP_CREATE_OBJ(cls) \
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void cls::InPlaceConstructor(void *mem) { new((EInPlace *)mem) cls; }
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#define IMPLEMENT_CLASS(cls) \
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_IMP_CREATE_OBJ(cls) \
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_IMP_PCLASS(cls,NULL,cls::InPlaceConstructor)
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#define IMPLEMENT_ABSTRACT_CLASS(cls) \
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_IMP_PCLASS(cls,NULL,NULL)
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class DObject
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{
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public:
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static PClass _StaticType;
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virtual PClass *StaticType() const { return &_StaticType; }
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static ClassReg RegistrationInfo, *RegistrationInfoPtr;
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static void InPlaceConstructor (void *mem);
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private:
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typedef DObject ThisClass;
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// Per-instance variables. There are four.
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private:
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PClass *Class; // This object's type
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public:
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public:
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DObject ();
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DObject (PClass *inClass);
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virtual ~DObject();
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inline bool IsKindOf (const PClass *base);
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inline bool IsA (const PClass *type);
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virtual void Destroy ();
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PClass *GetClass() const
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{
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if (Class == NULL)
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{
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// Save a little time the next time somebody wants this object's type
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// by recording it now.
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const_cast<DObject *>(this)->Class = StaticType();
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}
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return Class;
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}
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void SetClass (PClass *inClass)
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{
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Class = inClass;
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}
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void* operator new(size_t p)
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{
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return malloc(p);
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}
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void operator delete (void* mem)
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{
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free(mem);
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}
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protected:
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// This form of placement new and delete is for use *only* by PClass's
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// CreateNew() method. Do not use them for some other purpose.
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void *operator new(size_t, EInPlace *mem)
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{
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return (void *)mem;
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}
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void operator delete (void *mem, EInPlace *)
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{
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free (mem);
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}
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};
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#include "dobjtype.h"
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inline bool DObject::IsKindOf (const PClass *base)
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{
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return base->IsAncestorOf (GetClass ());
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}
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inline bool DObject::IsA (const PClass *type)
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{
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return (type == GetClass());
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}
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#endif
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#endif //__DOBJECT_H__
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