VirtualBox

source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemFree.c@ 104792

Last change on this file since 104792 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.7 KB
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1/* $Id: bs3-cmn-MemFree.c 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * BS3Kit - Bs3MemFree
4 */
5
6/*
7 * Copyright (C) 2007-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#include "bs3kit-template-header.h"
42#include "bs3-cmn-memory.h"
43
44
45#undef Bs3MemFree
46BS3_CMN_DEF(void, Bs3MemFree,(void BS3_FAR *pv, size_t cb))
47{
48 if (pv != NULL)
49 {
50 uint16_t cChunks;
51 PBS3SLABCTL pCtl;
52 BS3_XPTR_AUTO(void, pvFlat);
53 BS3_XPTR_SET(void, pvFlat, pv);
54
55 if (BS3_XPTR_GET_FLAT(void, pvFlat) & 0xfffU)
56 {
57 /* Use an XPTR here in case we're in real mode and the caller has
58 messed around with the pointer. */
59 BS3_XPTR_AUTO(BS3SLABCTL, pTmp);
60 BS3_XPTR_SET_FLAT(BS3SLABCTL, pTmp, BS3_XPTR_GET_FLAT(void, pvFlat) & ~(uint32_t)0xfff);
61 pCtl = BS3_XPTR_GET(BS3SLABCTL, pTmp);
62 BS3_ASSERT(pCtl->cbChunk >= cb);
63 cChunks = 1;
64 }
65 else
66 {
67 pCtl = BS3_XPTR_GET_FLAT(void, pvFlat) < _1M ? &g_Bs3Mem4KLow.Core : &g_Bs3Mem4KUpperTiled.Core;
68 cChunks = RT_ALIGN_Z(cb, _4K) >> 12;
69 }
70 Bs3SlabFree(pCtl, BS3_XPTR_GET_FLAT(void, pvFlat), cChunks);
71 }
72}
73
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