diff options
Diffstat (limited to 'src/VBox/Runtime/r3/posix/thread2-posix.cpp')
-rw-r--r-- | src/VBox/Runtime/r3/posix/thread2-posix.cpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/posix/thread2-posix.cpp b/src/VBox/Runtime/r3/posix/thread2-posix.cpp new file mode 100644 index 00000000..0f9feb76 --- /dev/null +++ b/src/VBox/Runtime/r3/posix/thread2-posix.cpp @@ -0,0 +1,133 @@ +/* $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; +} + |