| 1 | /* $Id: thread-affinity-solaris.cpp 37154 2011-05-19 12:54:32Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Thread Affinity, Solaris ring-3 implementation.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2011 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.215389.xyz. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*******************************************************************************
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| 29 | * Header Files *
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| 30 | *******************************************************************************/
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| 31 | #include <iprt/thread.h>
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| 32 | #include "internal/iprt.h"
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| 33 |
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| 34 | #include <iprt/assert.h>
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| 35 | #include <iprt/cpuset.h>
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| 36 | #include <iprt/err.h>
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| 37 | #include <iprt/mp.h>
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| 38 |
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| 39 | #include <sys/types.h>
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| 40 | #include <sys/processor.h>
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| 41 | #include <sys/procset.h>
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| 42 | #include <unistd.h>
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| 43 |
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| 44 |
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| 45 | /* Note! The current implementation can only bind to a single CPU. */
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| 46 |
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| 47 |
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| 48 | RTR3DECL(int) RTThreadSetAffinity(PCRTCPUSET pCpuSet)
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| 49 | {
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| 50 | int rc;
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| 51 | if (pCpuSet == NULL)
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| 52 | rc = processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL);
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| 53 | else
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| 54 | {
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| 55 | RTCPUSET PresentSet;
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| 56 | int cCpusInSet = RTCpuSetCount(&pCpuSet);
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| 57 | if (cCpusInSet == 1)
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| 58 | {
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| 59 | unsigned iCpu = 0;
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| 60 | while ( iCpu < RTCPUSET_MAX_CPUS
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| 61 | && !RTCpuSetIsMemberByIndex(pCpuSet, iCpu))
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| 62 | iCpu++;
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| 63 | rc = processor_bind(P_LWPID, P_MYID, iCpu, NULL);
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| 64 | }
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| 65 | else if ( cCpusInSet == RTCPUSET_MAX_CPUS
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| 66 | || RTCpuSetIsEqual(pCpuSet, RTMpGetPresentSet(&PresentSet)))
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| 67 | rc = processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL);
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| 68 | else
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| 69 | return VERR_NOT_SUPPORTED;
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| 70 | }
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| 71 | if (!rc)
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| 72 | return VINF_SUCCESS;
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| 73 | return RTErrConvertFromErrno(errno);
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| 74 | }
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| 75 |
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| 76 |
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| 77 | RTR3DECL(int) RTThreadGetAffinity(PRTCPUSET pCpuSet)
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| 78 | {
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| 79 | processorid_t iOldCpu;
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| 80 | int rc = processor_bind(P_LWPID, P_MYID, PBIND_QUERY, &iOldCpu);
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| 81 | if (rc)
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| 82 | return RTErrConvertFromErrno(errno);
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| 83 | if (iOldCpu == PBIND_NONE)
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| 84 | RTMpGetPresentSet(pCpuSet);
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| 85 | else
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| 86 | {
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| 87 | RTCpuSetEmpty(pCpuSet);
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| 88 | if (RTCpuSetAdd(pCpuSet, iOldCpu) != 0)
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| 89 | return VERR_INTERNAL_ERROR_5;
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| 90 | }
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| 91 | return VINF_SUCCESS;
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| 92 | }
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| 93 |
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