| 1 | /* $Id: thread2-posix.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Threads part 2, POSIX.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 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 | #define LOG_GROUP RTLOGGROUP_THREAD
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| 42 | #include <errno.h>
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| 43 | #include <pthread.h>
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| 44 | #include <unistd.h>
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| 45 | #include <sched.h>
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| 46 |
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| 47 | #include <iprt/thread.h>
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| 48 | #include <iprt/log.h>
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| 49 | #include <iprt/asm.h>
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| 50 | #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
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| 51 | # include <iprt/asm-amd64-x86.h>
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| 52 | #endif
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| 53 | #include <iprt/errcore.h>
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| 54 | #include "internal/thread.h"
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| 55 |
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| 56 |
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| 57 | RTDECL(RTNATIVETHREAD) RTThreadNativeSelf(void)
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| 58 | {
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| 59 | return (RTNATIVETHREAD)pthread_self();
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| 60 | }
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| 61 |
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| 62 |
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| 63 | RTDECL(int) RTThreadSleep(RTMSINTERVAL cMillies)
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| 64 | {
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| 65 | LogFlow(("RTThreadSleep: cMillies=%d\n", cMillies));
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| 66 | if (!cMillies)
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| 67 | {
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| 68 | if (!sched_yield())
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| 69 | {
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| 70 | LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", VINF_SUCCESS, cMillies));
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| 71 | return VINF_SUCCESS;
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| 72 | }
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| 73 | }
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| 74 | else
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| 75 | {
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| 76 | struct timespec ts;
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| 77 | struct timespec tsrem = {0,0};
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| 78 |
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| 79 | ts.tv_nsec = (cMillies % 1000) * 1000000;
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| 80 | ts.tv_sec = cMillies / 1000;
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| 81 | if (!nanosleep(&ts, &tsrem))
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| 82 | {
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| 83 | LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", VINF_SUCCESS, cMillies));
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| 84 | return VINF_SUCCESS;
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | int rc = RTErrConvertFromErrno(errno);
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| 89 | LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", rc, cMillies));
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| 90 | return rc;
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| 91 | }
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| 92 |
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| 93 |
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| 94 | RTDECL(int) RTThreadSleepNoLog(RTMSINTERVAL cMillies)
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| 95 | {
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| 96 | if (!cMillies)
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| 97 | {
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| 98 | if (!sched_yield())
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| 99 | return VINF_SUCCESS;
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| 100 | }
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| 101 | else
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| 102 | {
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| 103 | struct timespec ts;
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| 104 | struct timespec tsrem = {0,0};
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| 105 |
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| 106 | ts.tv_nsec = (cMillies % 1000) * 1000000;
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| 107 | ts.tv_sec = cMillies / 1000;
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| 108 | if (!nanosleep(&ts, &tsrem))
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| 109 | return VINF_SUCCESS;
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| 110 | }
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| 111 |
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| 112 | return RTErrConvertFromErrno(errno);
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| 113 | }
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| 114 |
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| 115 |
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| 116 | RTDECL(bool) RTThreadYield(void)
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| 117 | {
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| 118 | #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
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| 119 | uint64_t u64TS = ASMReadTSC();
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| 120 | #endif
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| 121 |
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| 122 | sched_yield();
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| 123 |
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| 124 | #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
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| 125 | u64TS = ASMReadTSC() - u64TS;
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| 126 | bool fRc = u64TS > 1500;
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| 127 | LogFlow(("RTThreadYield: returning %d (%llu ticks)\n", fRc, u64TS));
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| 128 | #else
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| 129 | bool fRc = true; /* PORTME: Add heuristics for determining whether the cpus was yielded. */
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| 130 | #endif
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| 131 | return fRc;
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| 132 | }
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| 133 |
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