mirror of https://github.com/PCSX2/pcsx2.git
73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/* Pcsx2 - Pc Ps2 Emulator
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* Copyright (C) 2002-2009 Pcsx2 Team
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*
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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; either version 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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 Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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// This module contains implementations of _aligned_malloc for platforms that don't have
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// it built into their CRT/libc.
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#include "PrecompiledHeader.h"
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#include "System.h"
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struct AlignedMallocHeader
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{
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u32 size; // size of the allocated buffer (minus alignment and header)
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void* baseptr; // offset of the original allocated pointer
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};
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static const uint headsize = sizeof(AlignedMallocHeader);
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void* __fastcall pcsx2_aligned_malloc(size_t size, size_t align)
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{
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jASSUME( align < 0x10000 );
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u8* p = (u8*)malloc(size+align+headsize);
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// start alignment calculations from past the header.
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uptr pasthead = (uptr)(p+headsize);
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uptr aligned = (pasthead + align-1) & ~(align-1);
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AlignedMallocHeader* header = (AlignedMallocHeader*)(aligned-headsize);
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jASSUME( (uptr)header >= (uptr)p );
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header->baseptr = p;
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header->size = size;
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return (void*)aligned;
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}
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void* __fastcall pcsx2_aligned_realloc(void* handle, size_t size, size_t align)
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{
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if( handle == NULL ) return NULL;
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jASSUME( align < 0x10000 );
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AlignedMallocHeader* header = (AlignedMallocHeader*)((uptr)handle - headsize);
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void* newbuf = pcsx2_aligned_malloc( size, align );
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memcpy_fast( newbuf, handle, std::min( size, header->size ) );
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free( header->baseptr );
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return newbuf;
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}
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__forceinline void pcsx2_aligned_free(void* pmem)
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{
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if( pmem == NULL ) return;
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AlignedMallocHeader* header = (AlignedMallocHeader*)((uptr)pmem - headsize);
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free( header->baseptr );
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}
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