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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /include/VBox/Graphics/HGSMIMemAlloc.h | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | include/VBox/Graphics/HGSMIMemAlloc.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/include/VBox/Graphics/HGSMIMemAlloc.h b/include/VBox/Graphics/HGSMIMemAlloc.h new file mode 100644 index 00000000..dae6777b --- /dev/null +++ b/include/VBox/Graphics/HGSMIMemAlloc.h @@ -0,0 +1,113 @@ +/* $Id: HGSMIMemAlloc.h $ */ +/** @file + * VBox Host Guest Shared Memory Interface (HGSMI) - Memory allocator. + */ + +/* + * Copyright (C) 2014-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + +#ifndef VBOX_INCLUDED_Graphics_HGSMIMemAlloc_h +#define VBOX_INCLUDED_Graphics_HGSMIMemAlloc_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include "HGSMIDefs.h" +#include "VBoxVideoIPRT.h" + + +/* Descriptor. */ +#define HGSMI_MA_DESC_OFFSET_MASK UINT32_C(0xFFFFFFE0) +#define HGSMI_MA_DESC_FREE_MASK UINT32_C(0x00000010) +#define HGSMI_MA_DESC_ORDER_MASK UINT32_C(0x0000000F) + +#define HGSMI_MA_DESC_OFFSET(d) ((d) & HGSMI_MA_DESC_OFFSET_MASK) +#define HGSMI_MA_DESC_IS_FREE(d) (((d) & HGSMI_MA_DESC_FREE_MASK) != 0) +#define HGSMI_MA_DESC_ORDER(d) ((d) & HGSMI_MA_DESC_ORDER_MASK) + +#define HGSMI_MA_DESC_ORDER_BASE UINT32_C(5) + +#define HGSMI_MA_BLOCK_SIZE_MIN (UINT32_C(1) << (HGSMI_MA_DESC_ORDER_BASE + 0)) +#define HGSMI_MA_BLOCK_SIZE_MAX (UINT32_C(1) << (HGSMI_MA_DESC_ORDER_BASE + HGSMI_MA_DESC_ORDER_MASK)) + +/* HGSMI_MA_DESC_ORDER_BASE must correspond to HGSMI_MA_DESC_OFFSET_MASK. */ +AssertCompile((~HGSMI_MA_DESC_OFFSET_MASK + 1) == HGSMI_MA_BLOCK_SIZE_MIN); + + +typedef struct HGSMIMABLOCK +{ + RTLISTNODE nodeBlock; + RTLISTNODE nodeFree; + HGSMIOFFSET descriptor; +} HGSMIMABLOCK; + +typedef struct HGSMIMADATA +{ + HGSMIAREA area; + HGSMIENV env; + HGSMISIZE cbMaxBlock; + + uint32_t cBlocks; /* How many blocks in the listBlocks. */ + RTLISTANCHOR listBlocks; /* All memory blocks, sorted. */ + RTLISTANCHOR aListFreeBlocks[HGSMI_MA_DESC_ORDER_MASK + 1]; /* For free blocks of each order. */ +} HGSMIMADATA; + +RT_C_DECLS_BEGIN + +int HGSMIMAInit(HGSMIMADATA *pMA, const HGSMIAREA *pArea, + HGSMIOFFSET *paDescriptors, uint32_t cDescriptors, HGSMISIZE cbMaxBlock, + const HGSMIENV *pEnv); +void HGSMIMAUninit(HGSMIMADATA *pMA); + +void RT_UNTRUSTED_VOLATILE_HSTGST *HGSMIMAAlloc(HGSMIMADATA *pMA, HGSMISIZE cb); +void HGSMIMAFree(HGSMIMADATA *pMA, void RT_UNTRUSTED_VOLATILE_GUEST *pv); + +HGSMIMABLOCK *HGSMIMASearchOffset(HGSMIMADATA *pMA, HGSMIOFFSET off); + +uint32_t HGSMIPopCnt32(uint32_t u32); + +DECLINLINE(HGSMISIZE) HGSMIMAOrder2Size(HGSMIOFFSET order) +{ + return (UINT32_C(1) << (HGSMI_MA_DESC_ORDER_BASE + order)); +} + +DECLINLINE(HGSMIOFFSET) HGSMIMASize2Order(HGSMISIZE cb) +{ + HGSMIOFFSET order = HGSMIPopCnt32(cb - 1) - HGSMI_MA_DESC_ORDER_BASE; +#ifdef HGSMI_STRICT + Assert(HGSMIMAOrder2Size(order) == cb); +#endif + return order; +} + +RT_C_DECLS_END + +#endif /* !VBOX_INCLUDED_Graphics_HGSMIMemAlloc_h */ |