| 1 | /* $Id: bs3-cmn-MemAlloc.c 58814 2015-11-22 06:50:50Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * BS3Kit - Bs3MemAlloc
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2007-2015 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.alldomusa.eu.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 | /*********************************************************************************************************************************
|
|---|
| 28 | * Header Files *
|
|---|
| 29 | *********************************************************************************************************************************/
|
|---|
| 30 | #include "bs3kit-template-header.h"
|
|---|
| 31 | #include "bs3-cmn-memory.h"
|
|---|
| 32 | #include <iprt/asm.h>
|
|---|
| 33 |
|
|---|
| 34 |
|
|---|
| 35 | BS3_DECL(void BS3_FAR *) Bs3MemAlloc(BS3MEMKIND enmKind, size_t cb)
|
|---|
| 36 | {
|
|---|
| 37 | void BS3_FAR *pvRet;
|
|---|
| 38 | uint8_t idxSlabList = bs3MemSizeToSlabListIndex(cb);
|
|---|
| 39 | if (idxSlabList < BS3_MEM_SLAB_LIST_COUNT)
|
|---|
| 40 | {
|
|---|
| 41 | /*
|
|---|
| 42 | * Try allocate a chunk from the list.
|
|---|
| 43 | */
|
|---|
| 44 | PBS3SLABHEAD pHead = enmKind == BS3MEMKIND_REAL
|
|---|
| 45 | ? &BS3_MSC64_FIXUP_HACK(BS3SLABHEAD, BS3_DATA_NM(g_aBs3LowSlabLists))[idxSlabList]
|
|---|
| 46 | : &BS3_MSC64_FIXUP_HACK(BS3SLABHEAD, BS3_DATA_NM(g_aBs3UpperTiledSlabLists))[idxSlabList];
|
|---|
| 47 |
|
|---|
| 48 | BS3_ASSERT(BS3_MSC64_FIXUP_HACK(BS3SLABHEAD, BS3_DATA_NM(g_aBs3LowSlabLists))[idxSlabList].cbChunk >= cb);
|
|---|
| 49 | pvRet = Bs3SlabListAlloc(pHead);
|
|---|
| 50 | if (pvRet)
|
|---|
| 51 | { /* likely */ }
|
|---|
| 52 | else
|
|---|
| 53 | {
|
|---|
| 54 | /*
|
|---|
| 55 | * Grow the list.
|
|---|
| 56 | */
|
|---|
| 57 | PBS3SLABCTL pNew = (PBS3SLABCTL)Bs3SlabAlloc( enmKind == BS3MEMKIND_REAL
|
|---|
| 58 | ? &BS3_DATA_NM(g_Bs3Mem4KLow).Core
|
|---|
| 59 | : &BS3_DATA_NM(g_Bs3Mem4KUpperTiled).Core);
|
|---|
| 60 | BS3_ASSERT(((uintptr_t)pNew & 0xfff) == 0);
|
|---|
| 61 | if (pNew)
|
|---|
| 62 | {
|
|---|
| 63 | uint16_t const cbHdr = BS3_DATA_NM(g_cbBs3SlabCtlSizesforLists)[idxSlabList];
|
|---|
| 64 | BS3_XPTR_AUTO(void, pvNew);
|
|---|
| 65 | BS3_XPTR_SET(void, pvNew, pNew);
|
|---|
| 66 |
|
|---|
| 67 | Bs3SlabInit(pNew, cbHdr, BS3_XPTR_GET_FLAT(void, pvNew) + cbHdr, _4K - cbHdr, pHead->cbChunk);
|
|---|
| 68 | Bs3SlabListAdd(pHead, pNew);
|
|---|
| 69 |
|
|---|
| 70 | pvRet = Bs3SlabListAlloc(pHead);
|
|---|
| 71 | }
|
|---|
| 72 | }
|
|---|
| 73 | }
|
|---|
| 74 | else
|
|---|
| 75 | {
|
|---|
| 76 | /*
|
|---|
| 77 | * Allocate one or more pages.
|
|---|
| 78 | */
|
|---|
| 79 | size_t const cbAligned = RT_ALIGN_Z(cb, _4K);
|
|---|
| 80 | uint16_t const cPages = cbAligned >> 12 /* div _4K */;
|
|---|
| 81 |
|
|---|
| 82 | pvRet = Bs3SlabAllocEx(enmKind == BS3MEMKIND_REAL
|
|---|
| 83 | ? &BS3_DATA_NM(g_Bs3Mem4KLow).Core : &BS3_DATA_NM(g_Bs3Mem4KUpperTiled).Core,
|
|---|
| 84 | cPages,
|
|---|
| 85 | cPages <= _64K / _4K ? BS3_SLAB_ALLOC_F_SAME_TILE : 0);
|
|---|
| 86 | }
|
|---|
| 87 | return pvRet;
|
|---|
| 88 | }
|
|---|
| 89 |
|
|---|
