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+/** @file
+ * VirtualBox - VMCPUSET Operation.
+ */
+
+/*
+ * Copyright (C) 2006-2023 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_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 */
+