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/** @file
* VirtualBox - VMCPUSET Operation.
*/
/*
* Copyright (C) 2006-2022 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_vmm_vmcpuset_h
#define VBOX_INCLUDED_vmm_vmcpuset_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <VBox/types.h>
#include <iprt/asm.h>
#include <iprt/string.h>
/** @defgroup grp_vmcpuset VMCPUSET Operations
* @ingroup grp_types_both
* @sa VMCPUSET
* @{
*/
/** Tests if a valid CPU ID is present in the set. */
#define VMCPUSET_IS_PRESENT(pSet, idCpu) ASMBitTest( &(pSet)->au32Bitmap[0], (idCpu))
/** Adds a CPU to the set. */
#define VMCPUSET_ADD(pSet, idCpu) ASMBitSet( &(pSet)->au32Bitmap[0], (idCpu))
/** Deletes a CPU from the set. */
#define VMCPUSET_DEL(pSet, idCpu) ASMBitClear(&(pSet)->au32Bitmap[0], (idCpu))
/** Adds a CPU to the set, atomically. */
#define VMCPUSET_ATOMIC_ADD(pSet, idCpu) ASMAtomicBitSet( &(pSet)->au32Bitmap[0], (idCpu))
/** Deletes a CPU from the set, atomically. */
#define VMCPUSET_ATOMIC_DEL(pSet, idCpu) ASMAtomicBitClear(&(pSet)->au32Bitmap[0], (idCpu))
/** Empties the set. */
#define VMCPUSET_EMPTY(pSet) memset(&(pSet)->au32Bitmap[0], '\0', sizeof((pSet)->au32Bitmap))
/** Fills the set. */
#define VMCPUSET_FILL(pSet) memset(&(pSet)->au32Bitmap[0], 0xff, sizeof((pSet)->au32Bitmap))
/** Checks if two sets are equal to one another. */
#define VMCPUSET_IS_EQUAL(pSet1, pSet2) (memcmp(&(pSet1)->au32Bitmap[0], &(pSet2)->au32Bitmap[0], sizeof((pSet1)->au32Bitmap)) == 0)
/** Checks if the set is empty. */
#define VMCPUSET_IS_EMPTY(a_pSet) ( (a_pSet)->au32Bitmap[0] == 0 \
&& (a_pSet)->au32Bitmap[1] == 0 \
&& (a_pSet)->au32Bitmap[2] == 0 \
&& (a_pSet)->au32Bitmap[3] == 0 \
&& (a_pSet)->au32Bitmap[4] == 0 \
&& (a_pSet)->au32Bitmap[5] == 0 \
&& (a_pSet)->au32Bitmap[6] == 0 \
&& (a_pSet)->au32Bitmap[7] == 0 \
)
/** Finds the first CPU present in the SET.
* @returns CPU index if found, NIL_VMCPUID if not. */
#define VMCPUSET_FIND_FIRST_PRESENT(a_pSet) VMCpuSetFindFirstPresentInternal(a_pSet)
/** Implements VMCPUSET_FIND_FIRST_PRESENT.
*
* @returns CPU index of the first CPU present in the set, NIL_VMCPUID if none
* are present.
* @param pSet The set to scan.
*/
DECLINLINE(int32_t) VMCpuSetFindFirstPresentInternal(PCVMCPUSET pSet)
{
int i = ASMBitFirstSet(&pSet->au32Bitmap[0], RT_ELEMENTS(pSet->au32Bitmap) * 32);
return i >= 0 ? (VMCPUID)i : NIL_VMCPUID;
}
/** Finds the first CPU present in the SET.
* @returns CPU index if found, NIL_VMCPUID if not. */
#define VMCPUSET_FIND_LAST_PRESENT(a_pSet) VMCpuSetFindLastPresentInternal(a_pSet)
/** Implements VMCPUSET_FIND_LAST_PRESENT.
*
* @returns CPU index of the last CPU present in the set, NIL_VMCPUID if none
* are present.
* @param pSet The set to scan.
*/
DECLINLINE(int32_t) VMCpuSetFindLastPresentInternal(PCVMCPUSET pSet)
{
uint32_t i = RT_ELEMENTS(pSet->au32Bitmap);
while (i-- > 0)
{
uint32_t u = pSet->au32Bitmap[i];
if (u)
{
u = ASMBitLastSetU32(u);
u--;
u |= i << 5;
return u;
}
}
return NIL_VMCPUID;
}
/** @} */
#endif /* !VBOX_INCLUDED_vmm_vmcpuset_h */
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