124 lines
4.8 KiB
C
124 lines
4.8 KiB
C
/** @file
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* VirtualBox - VMCPUSET Operation.
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*/
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/*
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* Copyright (C) 2006-2023 Oracle and/or its affiliates.
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*
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* This file is part of VirtualBox base platform packages, as
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* available from https://www.virtualbox.org.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, in version 3 of the
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* License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <https://www.gnu.org/licenses>.
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*
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* The contents of this file may alternatively be used under the terms
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* of the Common Development and Distribution License Version 1.0
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* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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* in the VirtualBox distribution, in which case the provisions of the
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* CDDL are applicable instead of those of the GPL.
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*
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* You may elect to license modified versions of this file under the
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* terms and conditions of either the GPL or the CDDL or both.
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*
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* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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*/
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#ifndef VBOX_INCLUDED_vmm_vmcpuset_h
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#define VBOX_INCLUDED_vmm_vmcpuset_h
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#ifndef RT_WITHOUT_PRAGMA_ONCE
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# pragma once
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#endif
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#include <VBox/types.h>
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#include <iprt/asm.h>
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#include <iprt/string.h>
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/** @defgroup grp_vmcpuset VMCPUSET Operations
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* @ingroup grp_types_both
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* @sa VMCPUSET
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* @{
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*/
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/** Tests if a valid CPU ID is present in the set. */
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#define VMCPUSET_IS_PRESENT(pSet, idCpu) ASMBitTest( &(pSet)->au32Bitmap[0], (idCpu))
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/** Adds a CPU to the set. */
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#define VMCPUSET_ADD(pSet, idCpu) ASMBitSet( &(pSet)->au32Bitmap[0], (idCpu))
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/** Deletes a CPU from the set. */
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#define VMCPUSET_DEL(pSet, idCpu) ASMBitClear(&(pSet)->au32Bitmap[0], (idCpu))
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/** Adds a CPU to the set, atomically. */
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#define VMCPUSET_ATOMIC_ADD(pSet, idCpu) ASMAtomicBitSet( &(pSet)->au32Bitmap[0], (idCpu))
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/** Deletes a CPU from the set, atomically. */
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#define VMCPUSET_ATOMIC_DEL(pSet, idCpu) ASMAtomicBitClear(&(pSet)->au32Bitmap[0], (idCpu))
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/** Empties the set. */
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#define VMCPUSET_EMPTY(pSet) memset(&(pSet)->au32Bitmap[0], '\0', sizeof((pSet)->au32Bitmap))
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/** Fills the set. */
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#define VMCPUSET_FILL(pSet) memset(&(pSet)->au32Bitmap[0], 0xff, sizeof((pSet)->au32Bitmap))
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/** Checks if two sets are equal to one another. */
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#define VMCPUSET_IS_EQUAL(pSet1, pSet2) (memcmp(&(pSet1)->au32Bitmap[0], &(pSet2)->au32Bitmap[0], sizeof((pSet1)->au32Bitmap)) == 0)
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/** Checks if the set is empty. */
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#define VMCPUSET_IS_EMPTY(a_pSet) ( (a_pSet)->au32Bitmap[0] == 0 \
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&& (a_pSet)->au32Bitmap[1] == 0 \
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&& (a_pSet)->au32Bitmap[2] == 0 \
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&& (a_pSet)->au32Bitmap[3] == 0 \
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&& (a_pSet)->au32Bitmap[4] == 0 \
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&& (a_pSet)->au32Bitmap[5] == 0 \
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&& (a_pSet)->au32Bitmap[6] == 0 \
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&& (a_pSet)->au32Bitmap[7] == 0 \
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)
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/** Finds the first CPU present in the SET.
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* @returns CPU index if found, NIL_VMCPUID if not. */
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#define VMCPUSET_FIND_FIRST_PRESENT(a_pSet) VMCpuSetFindFirstPresentInternal(a_pSet)
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/** Implements VMCPUSET_FIND_FIRST_PRESENT.
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*
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* @returns CPU index of the first CPU present in the set, NIL_VMCPUID if none
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* are present.
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* @param pSet The set to scan.
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*/
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DECLINLINE(int32_t) VMCpuSetFindFirstPresentInternal(PCVMCPUSET pSet)
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{
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int i = ASMBitFirstSet(&pSet->au32Bitmap[0], RT_ELEMENTS(pSet->au32Bitmap) * 32);
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return i >= 0 ? (VMCPUID)i : NIL_VMCPUID;
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}
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/** Finds the first CPU present in the SET.
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* @returns CPU index if found, NIL_VMCPUID if not. */
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#define VMCPUSET_FIND_LAST_PRESENT(a_pSet) VMCpuSetFindLastPresentInternal(a_pSet)
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/** Implements VMCPUSET_FIND_LAST_PRESENT.
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*
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* @returns CPU index of the last CPU present in the set, NIL_VMCPUID if none
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* are present.
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* @param pSet The set to scan.
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*/
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DECLINLINE(int32_t) VMCpuSetFindLastPresentInternal(PCVMCPUSET pSet)
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{
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uint32_t i = RT_ELEMENTS(pSet->au32Bitmap);
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while (i-- > 0)
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{
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uint32_t u = pSet->au32Bitmap[i];
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if (u)
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{
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u = ASMBitLastSetU32(u);
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u--;
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u |= i << 5;
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return u;
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}
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}
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return NIL_VMCPUID;
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}
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/** @} */
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#endif /* !VBOX_INCLUDED_vmm_vmcpuset_h */
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