VirtualBox

source: vbox/trunk/src/VBox/Runtime/r3/allocex.h@ 97392

Last change on this file since 97392 was 96407, checked in by vboxsync, 2 years ago

scm copyright and license note update

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1/* $Id: allocex.h 96407 2022-08-22 17:43:14Z vboxsync $ */
2/** @file
3 * IPRT - Memory Allocation, Extended Alloc and Free Functions for Ring-3.
4 */
5
6/*
7 * Copyright (C) 2006-2022 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#ifndef IPRT_INCLUDED_SRC_r3_allocex_h
38#define IPRT_INCLUDED_SRC_r3_allocex_h
39#ifndef RT_WITHOUT_PRAGMA_ONCE
40# pragma once
41#endif
42
43#include <iprt/types.h>
44
45/**
46 * Heading for extended memory allocations in ring-3.
47 */
48typedef struct RTMEMHDRR3
49{
50 /** Magic (RTMEMHDR_MAGIC). */
51 uint32_t u32Magic;
52 /** Block flags (RTMEMALLOCEX_FLAGS_*). */
53 uint32_t fFlags;
54 /** The actual size of the block, header not included. */
55 uint32_t cb;
56 /** The requested allocation size. */
57 uint32_t cbReq;
58} RTMEMHDRR3;
59/** Pointer to a ring-3 extended memory header. */
60typedef RTMEMHDRR3 *PRTMEMHDRR3;
61
62
63/**
64 * Allocate memory in below 64KB.
65 *
66 * @returns IPRT status code.
67 * @param cbAlloc Number of bytes to allocate (including the
68 * header if the caller needs one).
69 * @param fFlags Allocation flags.
70 * @param ppv Where to return the pointer to the memory.
71 */
72DECLHIDDEN(int) rtMemAllocEx16BitReach(size_t cbAlloc, uint32_t fFlags, void **ppv);
73
74/**
75 * Allocate memory in below 4GB.
76 *
77 * @returns IPRT status code.
78 * @param cbAlloc Number of bytes to allocate (including the
79 * header if the caller needs one).
80 * @param fFlags Allocation flags.
81 * @param ppv Where to return the pointer to the memory.
82 */
83DECLHIDDEN(int) rtMemAllocEx32BitReach(size_t cbAlloc, uint32_t fFlags, void **ppv);
84
85
86/**
87 * Frees memory allocated by rtMemAllocEx16BitReach and rtMemAllocEx32BitReach.
88 *
89 * @param pv Start of allocation.
90 * @param cb Allocation size.
91 * @param fFlags Allocation flags.
92 */
93DECLHIDDEN(void) rtMemFreeExYyBitReach(void *pv, size_t cb, uint32_t fFlags);
94
95#endif /* !IPRT_INCLUDED_SRC_r3_allocex_h */
96
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