122 lines
4.8 KiB
C
122 lines
4.8 KiB
C
/*
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* ICE / OPCODE - Optimized Collision Detection
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* http://www.codercorner.com/Opcode.htm
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*
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* Copyright (c) 2001-2008 Pierre Terdiman, pierre@codercorner.com
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Contains all memory macros.
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* \file IceMemoryMacros.h
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* \author Pierre Terdiman
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* \date April, 4, 2000
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Include Guard
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#ifndef __ICEMEMORYMACROS_H__
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#define __ICEMEMORYMACROS_H__
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#undef ZeroMemory
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#undef CopyMemory
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#undef MoveMemory
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#undef FillMemory
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//! Clears a buffer.
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//! \param addr [in] buffer address
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//! \param size [in] buffer length
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//! \see FillMemory
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//! \see StoreDwords
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//! \see CopyMemory
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//! \see MoveMemory
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inline_ void ZeroMemory(void* addr, udword size) { memset(addr, 0, size); }
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//! Fills a buffer with a given byte.
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//! \param addr [in] buffer address
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//! \param size [in] buffer length
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//! \param val [in] the byte value
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//! \see StoreDwords
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//! \see ZeroMemory
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//! \see CopyMemory
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//! \see MoveMemory
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inline_ void FillMemory(void* dest, udword size, ubyte val) { memset(dest, val, size); }
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//! Fills a buffer with a given dword.
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//! \param addr [in] buffer address
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//! \param nb [in] number of dwords to write
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//! \param value [in] the dword value
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//! \see FillMemory
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//! \see ZeroMemory
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//! \see CopyMemory
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//! \see MoveMemory
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//! \warning writes nb*4 bytes !
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inline_ void StoreDwords(udword* dest, udword nb, udword value)
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{
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// The asm code below **SHOULD** be equivalent to one of those C versions
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// or the other if your compiled is good: (checked on VC++ 6.0)
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//
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// 1) while(nb--) *dest++ = value;
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//
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// 2) for(udword i=0;i<nb;i++) dest[i] = value;
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//
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_asm push eax
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_asm push ecx
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_asm push edi
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_asm mov edi, dest
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_asm mov ecx, nb
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_asm mov eax, value
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_asm rep stosd
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_asm pop edi
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_asm pop ecx
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_asm pop eax
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}
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//! Copies a buffer.
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//! \param addr [in] destination buffer address
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//! \param addr [in] source buffer address
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//! \param size [in] buffer length
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//! \see ZeroMemory
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//! \see FillMemory
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//! \see StoreDwords
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//! \see MoveMemory
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inline_ void CopyMemory(void* dest, const void* src, udword size) { memcpy(dest, src, size); }
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//! Moves a buffer.
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//! \param addr [in] destination buffer address
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//! \param addr [in] source buffer address
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//! \param size [in] buffer length
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//! \see ZeroMemory
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//! \see FillMemory
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//! \see StoreDwords
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//! \see CopyMemory
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inline_ void MoveMemory(void* dest, const void* src, udword size) { memmove(dest, src, size); }
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#define SIZEOFOBJECT sizeof(*this) //!< Gives the size of current object. Avoid some mistakes (e.g. "sizeof(this)").
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//#define CLEAROBJECT { memset(this, 0, SIZEOFOBJECT); } //!< Clears current object. Laziness is my business. HANDLE WITH CARE.
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#define DELETESINGLE(x) if (x) { delete x; x = null; } //!< Deletes an instance of a class.
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#define DELETEARRAY(x) if (x) { delete []x; x = null; } //!< Deletes an array.
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#define SAFE_RELEASE(x) if (x) { (x)->Release(); (x) = null; } //!< Safe D3D-style release
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#define SAFE_DESTRUCT(x) if (x) { (x)->SelfDestruct(); (x) = null; } //!< Safe ICE-style release
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#ifdef __ICEERROR_H__
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#define CHECKALLOC(x) if(!x) return SetIceError("Out of memory.", EC_OUT_OF_MEMORY); //!< Standard alloc checking. HANDLE WITH CARE.
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#else
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#define CHECKALLOC(x) if(!x) return false;
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#endif
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//! Standard allocation cycle
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#define SAFE_ALLOC(ptr, type, count) DELETEARRAY(ptr); ptr = new type[count]; CHECKALLOC(ptr);
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#endif // __ICEMEMORYMACROS_H__
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