VirtualBox

source: vbox/trunk/src/VBox/Runtime/r3/solaris/thread-affinity-solaris.cpp@ 103914

Last change on this file since 103914 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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1/* $Id: thread-affinity-solaris.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * IPRT - Thread Affinity, Solaris ring-3 implementation.
4 */
5
6/*
7 * Copyright (C) 2011-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#include <iprt/thread.h>
42#include "internal/iprt.h"
43
44#include <iprt/assert.h>
45#include <iprt/cpuset.h>
46#include <iprt/err.h>
47#include <iprt/mp.h>
48
49#include <sys/types.h>
50#include <sys/processor.h>
51#include <sys/procset.h>
52#include <unistd.h>
53#include <errno.h>
54
55
56/* Note! The current implementation can only bind to a single CPU. */
57
58
59RTR3DECL(int) RTThreadSetAffinity(PCRTCPUSET pCpuSet)
60{
61 int rc;
62 if (pCpuSet == NULL)
63 rc = processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL);
64 else
65 {
66 RTCPUSET PresentSet;
67 int cCpusInSet = RTCpuSetCount(pCpuSet);
68 if (cCpusInSet == 1)
69 {
70 unsigned iCpu = 0;
71 while ( iCpu < RTCPUSET_MAX_CPUS
72 && !RTCpuSetIsMemberByIndex(pCpuSet, iCpu))
73 iCpu++;
74 rc = processor_bind(P_LWPID, P_MYID, iCpu, NULL);
75 }
76 else if ( cCpusInSet == RTCPUSET_MAX_CPUS
77 || RTCpuSetIsEqual(pCpuSet, RTMpGetPresentSet(&PresentSet)))
78 rc = processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL);
79 else
80 return VERR_NOT_SUPPORTED;
81 }
82 if (!rc)
83 return VINF_SUCCESS;
84 return RTErrConvertFromErrno(errno);
85}
86
87
88RTR3DECL(int) RTThreadGetAffinity(PRTCPUSET pCpuSet)
89{
90 processorid_t iOldCpu;
91 int rc = processor_bind(P_LWPID, P_MYID, PBIND_QUERY, &iOldCpu);
92 if (rc)
93 return RTErrConvertFromErrno(errno);
94 if (iOldCpu == PBIND_NONE)
95 RTMpGetPresentSet(pCpuSet);
96 else
97 {
98 RTCpuSetEmpty(pCpuSet);
99 if (RTCpuSetAdd(pCpuSet, iOldCpu) != 0)
100 return VERR_INTERNAL_ERROR_5;
101 }
102 return VINF_SUCCESS;
103}
104
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