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/* $Id: thread2-posix.cpp $ */
/** @file
* IPRT - Threads part 2, POSIX.
*/
/*
* Copyright (C) 2006-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_THREAD
#include <errno.h>
#include <pthread.h>
#include <unistd.h>
#include <sched.h>
#include <iprt/thread.h>
#include <iprt/log.h>
#include <iprt/asm.h>
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
# include <iprt/asm-amd64-x86.h>
#endif
#include <iprt/errcore.h>
#include "internal/thread.h"
RTDECL(RTNATIVETHREAD) RTThreadNativeSelf(void)
{
return (RTNATIVETHREAD)pthread_self();
}
RTDECL(int) RTThreadSleep(RTMSINTERVAL cMillies)
{
LogFlow(("RTThreadSleep: cMillies=%d\n", cMillies));
if (!cMillies)
{
if (!sched_yield())
{
LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", VINF_SUCCESS, cMillies));
return VINF_SUCCESS;
}
}
else
{
struct timespec ts;
struct timespec tsrem = {0,0};
ts.tv_nsec = (cMillies % 1000) * 1000000;
ts.tv_sec = cMillies / 1000;
if (!nanosleep(&ts, &tsrem))
{
LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", VINF_SUCCESS, cMillies));
return VINF_SUCCESS;
}
}
int rc = RTErrConvertFromErrno(errno);
LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", rc, cMillies));
return rc;
}
RTDECL(int) RTThreadSleepNoLog(RTMSINTERVAL cMillies)
{
if (!cMillies)
{
if (!sched_yield())
return VINF_SUCCESS;
}
else
{
struct timespec ts;
struct timespec tsrem = {0,0};
ts.tv_nsec = (cMillies % 1000) * 1000000;
ts.tv_sec = cMillies / 1000;
if (!nanosleep(&ts, &tsrem))
return VINF_SUCCESS;
}
return RTErrConvertFromErrno(errno);
}
RTDECL(bool) RTThreadYield(void)
{
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
uint64_t u64TS = ASMReadTSC();
#endif
sched_yield();
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
u64TS = ASMReadTSC() - u64TS;
bool fRc = u64TS > 1500;
LogFlow(("RTThreadYield: returning %d (%llu ticks)\n", fRc, u64TS));
#else
bool fRc = true; /* PORTME: Add heuristics for determining whether the cpus was yielded. */
#endif
return fRc;
}
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