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| -rw-r--r-- | include/VBox/vmm/vmcpuset.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/include/VBox/vmm/vmcpuset.h b/include/VBox/vmm/vmcpuset.h new file mode 100644 index 00000000..e11d8d0c --- /dev/null +++ b/include/VBox/vmm/vmcpuset.h @@ -0,0 +1,114 @@ +/** @file + * VirtualBox - VMCPUSET Operation. + */ + +/* + * Copyright (C) 2006-2020 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE 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. + */ + +#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 */ + |