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/* $Id$ */
/** @file
* IPRT - Thread Affinity, Solaris ring-3 implementation.
*/
/*
* Copyright (C) 2011-2022 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/thread.h>
#include "internal/iprt.h"
#include <iprt/assert.h>
#include <iprt/cpuset.h>
#include <iprt/err.h>
#include <iprt/mp.h>
#include <sys/types.h>
#include <sys/processor.h>
#include <sys/procset.h>
#include <unistd.h>
#include <errno.h>
/* Note! The current implementation can only bind to a single CPU. */
RTR3DECL(int) RTThreadSetAffinity(PCRTCPUSET pCpuSet)
{
int rc;
if (pCpuSet == NULL)
rc = processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL);
else
{
RTCPUSET PresentSet;
int cCpusInSet = RTCpuSetCount(pCpuSet);
if (cCpusInSet == 1)
{
unsigned iCpu = 0;
while ( iCpu < RTCPUSET_MAX_CPUS
&& !RTCpuSetIsMemberByIndex(pCpuSet, iCpu))
iCpu++;
rc = processor_bind(P_LWPID, P_MYID, iCpu, NULL);
}
else if ( cCpusInSet == RTCPUSET_MAX_CPUS
|| RTCpuSetIsEqual(pCpuSet, RTMpGetPresentSet(&PresentSet)))
rc = processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL);
else
return VERR_NOT_SUPPORTED;
}
if (!rc)
return VINF_SUCCESS;
return RTErrConvertFromErrno(errno);
}
RTR3DECL(int) RTThreadGetAffinity(PRTCPUSET pCpuSet)
{
processorid_t iOldCpu;
int rc = processor_bind(P_LWPID, P_MYID, PBIND_QUERY, &iOldCpu);
if (rc)
return RTErrConvertFromErrno(errno);
if (iOldCpu == PBIND_NONE)
RTMpGetPresentSet(pCpuSet);
else
{
RTCpuSetEmpty(pCpuSet);
if (RTCpuSetAdd(pCpuSet, iOldCpu) != 0)
return VERR_INTERNAL_ERROR_5;
}
return VINF_SUCCESS;
}
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