| 1 | /* $Id: allocex.h 69111 2017-10-17 14:26:02Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Memory Allocation, Extended Alloc and Free Functions for Ring-3.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2017 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | #ifndef ___r3_allocex_h
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| 29 | #define ___r3_allocex_h
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| 30 |
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| 31 | #include <iprt/types.h>
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| 32 |
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| 33 | /**
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| 34 | * Heading for extended memory allocations in ring-3.
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| 35 | */
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| 36 | typedef struct RTMEMHDRR3
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| 37 | {
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| 38 | /** Magic (RTMEMHDR_MAGIC). */
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| 39 | uint32_t u32Magic;
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| 40 | /** Block flags (RTMEMALLOCEX_FLAGS_*). */
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| 41 | uint32_t fFlags;
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| 42 | /** The actual size of the block, header not included. */
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| 43 | uint32_t cb;
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| 44 | /** The requested allocation size. */
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| 45 | uint32_t cbReq;
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| 46 | } RTMEMHDRR3;
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| 47 | /** Pointer to a ring-3 extended memory header. */
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| 48 | typedef RTMEMHDRR3 *PRTMEMHDRR3;
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| 49 |
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| 50 |
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| 51 | /**
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| 52 | * Allocate memory in below 64KB.
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| 53 | *
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| 54 | * @returns IPRT status code.
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| 55 | * @param cbAlloc Number of bytes to allocate (including the
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| 56 | * header if the caller needs one).
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| 57 | * @param fFlags Allocation flags.
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| 58 | * @param ppv Where to return the pointer to the memory.
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| 59 | */
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| 60 | DECLHIDDEN(int) rtMemAllocEx16BitReach(size_t cbAlloc, uint32_t fFlags, void **ppv);
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| 61 |
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| 62 | /**
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| 63 | * Allocate memory in below 4GB.
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| 64 | *
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| 65 | * @returns IPRT status code.
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| 66 | * @param cbAlloc Number of bytes to allocate (including the
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| 67 | * header if the caller needs one).
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| 68 | * @param fFlags Allocation flags.
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| 69 | * @param ppv Where to return the pointer to the memory.
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| 70 | */
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| 71 | DECLHIDDEN(int) rtMemAllocEx32BitReach(size_t cbAlloc, uint32_t fFlags, void **ppv);
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| 72 |
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| 73 |
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| 74 | /**
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| 75 | * Frees memory allocated by rtMemAllocEx16BitReach and rtMemAllocEx32BitReach.
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| 76 | *
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| 77 | * @param pv Start of allocation.
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| 78 | * @param cb Allocation size.
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| 79 | * @param fFlags Allocation flags.
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| 80 | */
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| 81 | DECLHIDDEN(void) rtMemFreeExYyBitReach(void *pv, size_t cb, uint32_t fFlags);
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| 82 |
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| 83 | #endif
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| 84 |
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