allocex-r3-generic.cpp revision dd3b708fb52e912a0a07fab811a5427d5abf15e6
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * IPRT - Memory Allocation, Extended Alloc and Free Functions for Ring-3, generic.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (C) 2006-2013 Oracle Corporation
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * available from http://www.virtualbox.org. This file is free software;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * you can redistribute it and/or modify it under the terms of the GNU
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * General Public License (GPL) as published by the Free Software
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The contents of this file may alternatively be used under the terms
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * of the Common Development and Distribution License Version 1.0
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * VirtualBox OSE distribution, in which case the provisions of the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * CDDL are applicable instead of those of the GPL.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * You may elect to license modified versions of this file under the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * terms and conditions of either the GPL or the CDDL or both.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*******************************************************************************
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync* Header Files *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync*******************************************************************************/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*******************************************************************************
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync* Structures and Typedefs *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync*******************************************************************************/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Heading for extended memory allocations in ring-3.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsynctypedef struct RTMEMHDRR3
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /** Magic (RTMEMHDR_MAGIC). */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /** Block flags (RTMEMALLOCEX_FLAGS_*). */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /** The actual size of the block, header not included. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /** The requested allocation size. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/** Pointer to a ring-3 extended memory header. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncRTDECL(int) RTMemAllocExTag(size_t cb, size_t cbAlignment, uint32_t fFlags, const char *pszTag, void **ppv) RT_NO_THROW
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Validate and adjust input.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AssertMsgReturn(!(fFlags & ~RTMEMALLOCEX_FLAGS_VALID_MASK), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AssertReturn(RT_IS_POWER_OF_TWO(cbAlignment), VERR_INVALID_PARAMETER);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AssertMsgReturn(cbAlignment <= sizeof(void *), ("%zu (%#x)\n", cbAlignment, cbAlignment), VERR_UNSUPPORTED_ALIGNMENT);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (fFlags & (RTMEMALLOCEX_FLAGS_16BIT_REACH | RTMEMALLOCEX_FLAGS_32BIT_REACH | RTMEMALLOCEX_FLAGS_ANY_CTX))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Align the request.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AssertMsgReturn(cbAligned >= cb && cbAligned <= ~(size_t)0 / 2U, ("cbAligned=%#zx cb=%#zx", cbAligned, cb),
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Allocate the requested memory.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync pv = RTMemExecAlloc(cbAligned + sizeof(RTMEMHDRR3));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Fill in the header and return.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncRTDECL(void) RTMemFreeEx(void *pv, size_t cb) RT_NO_THROW
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AssertMsg(pHdr->u32Magic == RTMEMHDR_MAGIC, ("pHdr->u32Magic=%RX32 pv=%p cb=%#x\n", pHdr->u32Magic, pv, cb));