1 | /* $Id: thread-affinity-solaris.cpp 98103 2023-01-17 14:15:46Z 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) 2011-2023 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * The contents of this file may alternatively be used under the terms
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26 | * of the Common Development and Distribution License Version 1.0
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27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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28 | * in the VirtualBox distribution, in which case the provisions of the
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29 | * CDDL are applicable instead of those of the GPL.
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30 | *
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31 | * You may elect to license modified versions of this file under the
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32 | * terms and conditions of either the GPL or the CDDL or both.
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33 | *
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34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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35 | */
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36 |
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37 |
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38 | /*********************************************************************************************************************************
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39 | * Header Files *
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40 | *********************************************************************************************************************************/
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41 | #include <iprt/thread.h>
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42 | #include "internal/iprt.h"
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43 |
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44 | #include <iprt/assert.h>
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45 | #include <iprt/cpuset.h>
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46 | #include <iprt/err.h>
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47 | #include <iprt/mp.h>
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48 |
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49 | #include <sys/types.h>
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50 | #include <sys/processor.h>
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51 | #include <sys/procset.h>
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52 | #include <unistd.h>
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53 | #include <errno.h>
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54 |
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55 |
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56 | /* Note! The current implementation can only bind to a single CPU. */
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57 |
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58 |
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59 | RTR3DECL(int) RTThreadSetAffinity(PCRTCPUSET pCpuSet)
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60 | {
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61 | int rc;
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62 | if (pCpuSet == NULL)
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63 | rc = processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL);
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64 | else
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65 | {
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66 | RTCPUSET PresentSet;
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67 | int cCpusInSet = RTCpuSetCount(pCpuSet);
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68 | if (cCpusInSet == 1)
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69 | {
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70 | unsigned iCpu = 0;
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71 | while ( iCpu < RTCPUSET_MAX_CPUS
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72 | && !RTCpuSetIsMemberByIndex(pCpuSet, iCpu))
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73 | iCpu++;
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74 | rc = processor_bind(P_LWPID, P_MYID, iCpu, NULL);
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75 | }
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76 | else if ( cCpusInSet == RTCPUSET_MAX_CPUS
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77 | || RTCpuSetIsEqual(pCpuSet, RTMpGetPresentSet(&PresentSet)))
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78 | rc = processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL);
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79 | else
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80 | return VERR_NOT_SUPPORTED;
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81 | }
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82 | if (!rc)
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83 | return VINF_SUCCESS;
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84 | return RTErrConvertFromErrno(errno);
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85 | }
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86 |
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87 |
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88 | RTR3DECL(int) RTThreadGetAffinity(PRTCPUSET pCpuSet)
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89 | {
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90 | processorid_t iOldCpu;
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91 | int rc = processor_bind(P_LWPID, P_MYID, PBIND_QUERY, &iOldCpu);
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92 | if (rc)
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93 | return RTErrConvertFromErrno(errno);
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94 | if (iOldCpu == PBIND_NONE)
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95 | RTMpGetPresentSet(pCpuSet);
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96 | else
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97 | {
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98 | RTCpuSetEmpty(pCpuSet);
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99 | if (RTCpuSetAdd(pCpuSet, iOldCpu) != 0)
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100 | return VERR_INTERNAL_ERROR_5;
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101 | }
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102 | return VINF_SUCCESS;
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103 | }
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104 |
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