OpenSimMirror/libraries/ode-0.9/OPCODE/Ice/IceMemoryMacros.h

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
 *	Contains all memory macros.
 *	\file		IceMemoryMacros.h
 *	\author		Pierre Terdiman
 *	\date		April, 4, 2000
 */
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Include Guard
#ifndef __ICEMEMORYMACROS_H__
#define __ICEMEMORYMACROS_H__

#undef ZeroMemory
#undef CopyMemory
#undef MoveMemory
#undef FillMemory

	//!	Clears a buffer.
	//!	\param		addr	[in] buffer address
	//!	\param		size	[in] buffer length
	//!	\see		FillMemory
	//!	\see		StoreDwords
	//!	\see		CopyMemory
	//!	\see		MoveMemory
	inline_ void ZeroMemory(void* addr, udword size)					{ memset(addr, 0, size);		}

	//!	Fills a buffer with a given byte.
	//!	\param		addr	[in] buffer address
	//!	\param		size	[in] buffer length
	//!	\param		val		[in] the byte value
	//!	\see		StoreDwords
	//!	\see		ZeroMemory
	//!	\see		CopyMemory
	//!	\see		MoveMemory
	inline_ void FillMemory(void* dest, udword size, ubyte val)			{ memset(dest, val, size);		}

	//!	Fills a buffer with a given dword.
	//!	\param		addr	[in] buffer address
	//!	\param		nb		[in] number of dwords to write
	//!	\param		value	[in] the dword value
	//!	\see		FillMemory
	//!	\see		ZeroMemory
	//!	\see		CopyMemory
	//!	\see		MoveMemory
	//!	\warning	writes nb*4 bytes !
	inline_ void StoreDwords(udword* dest, udword nb, udword value)
	{
		// The asm code below **SHOULD** be equivalent to one of those C versions
		// or the other if your compiled is good: (checked on VC++ 6.0)
		//
		//	1) while(nb--)	*dest++ = value;
		//
		//	2) for(udword i=0;i<nb;i++)	dest[i] = value;
		//
#ifdef _MSC_VER
		_asm push eax
		_asm push ecx
		_asm push edi
		_asm mov edi, dest
		_asm mov ecx, nb
		_asm mov eax, value
		_asm rep stosd
		_asm pop edi
		_asm pop ecx
		_asm pop eax
#else
		while(nb--) *dest++ = value;
#endif
	}

	//!	Copies a buffer.
	//!	\param		addr	[in] destination buffer address
	//!	\param		addr	[in] source buffer address
	//!	\param		size	[in] buffer length
	//!	\see		ZeroMemory
	//!	\see		FillMemory
	//!	\see		StoreDwords
	//!	\see		MoveMemory
	inline_ void CopyMemory(void* dest, const void* src, udword size)	{ memcpy(dest, src, size);		}

	//!	Moves a buffer.
	//!	\param		addr	[in] destination buffer address
	//!	\param		addr	[in] source buffer address
	//!	\param		size	[in] buffer length
	//!	\see		ZeroMemory
	//!	\see		FillMemory
	//!	\see		StoreDwords
	//!	\see		CopyMemory
	inline_ void MoveMemory(void* dest, const void* src, udword size)	{ memmove(dest, src, size);		}

	#define SIZEOFOBJECT		sizeof(*this)									//!< Gives the size of current object. Avoid some mistakes (e.g. "sizeof(this)").
	//#define CLEAROBJECT		{ memset(this, 0, SIZEOFOBJECT);	}			//!< Clears current object. Laziness is my business. HANDLE WITH CARE.
	#define DELETESINGLE(x)		if (x) { delete x;				x = null; }		//!< Deletes an instance of a class.
	#define DELETEARRAY(x)		if (x) { delete []x;			x = null; }		//!< Deletes an array.
	#define SAFE_RELEASE(x)		if (x) { (x)->Release();		(x) = null; }	//!< Safe D3D-style release
	#define SAFE_DESTRUCT(x)	if (x) { (x)->SelfDestruct();	(x) = null; }	//!< Safe ICE-style release

#ifdef __ICEERROR_H__
	#define CHECKALLOC(x)		if(!x) return SetIceError("Out of memory.", EC_OUT_OF_MEMORY);	//!< Standard alloc checking. HANDLE WITH CARE.
#else
	#define CHECKALLOC(x)		if(!x) return false;
#endif

	//! Standard allocation cycle
	#define SAFE_ALLOC(ptr, type, count)	DELETEARRAY(ptr);	ptr = new type[count];	CHECKALLOC(ptr);

#endif // __ICEMEMORYMACROS_H__