diff options
Diffstat (limited to 'src/VBox/Runtime/r0drv/solaris/thread-r0drv-solaris.c')
| -rw-r--r-- | src/VBox/Runtime/r0drv/solaris/thread-r0drv-solaris.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/solaris/thread-r0drv-solaris.c b/src/VBox/Runtime/r0drv/solaris/thread-r0drv-solaris.c new file mode 100644 index 00000000..0fefabe9 --- /dev/null +++ b/src/VBox/Runtime/r0drv/solaris/thread-r0drv-solaris.c @@ -0,0 +1,195 @@ +/* $Id: thread-r0drv-solaris.c $ */ +/** @file + * IPRT - Threads, Ring-0 Driver, Solaris. + */ + +/* + * Copyright (C) 2006-2023 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 * +*********************************************************************************************************************************/ +#include "the-solaris-kernel.h" +#include "internal/iprt.h" +#include <iprt/thread.h> + +#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) +# include <iprt/asm-amd64-x86.h> +#endif +#include <iprt/assert.h> +#include <iprt/errcore.h> +#include <iprt/mp.h> + +#define SOL_THREAD_PREEMPT (*((char *)curthread + g_offrtSolThreadPreempt)) +#define SOL_CPU_RUNRUN (*((char *)CPU + g_offrtSolCpuPreempt)) +#define SOL_CPU_KPRUNRUN (*((char *)CPU + g_offrtSolCpuForceKernelPreempt)) + +RTDECL(RTNATIVETHREAD) RTThreadNativeSelf(void) +{ + return (RTNATIVETHREAD)curthread; +} + + +static int rtR0ThreadSolSleepCommon(RTMSINTERVAL cMillies) +{ + clock_t cTicks; + RT_ASSERT_PREEMPTIBLE(); + + if (!cMillies) + { + RTThreadYield(); + return VINF_SUCCESS; + } + + if (cMillies != RT_INDEFINITE_WAIT) + cTicks = drv_usectohz((clock_t)(cMillies * 1000L)); + else + cTicks = 0; + + delay(cTicks); + return VINF_SUCCESS; +} + + +RTDECL(int) RTThreadSleep(RTMSINTERVAL cMillies) +{ + return rtR0ThreadSolSleepCommon(cMillies); +} + + +RTDECL(int) RTThreadSleepNoLog(RTMSINTERVAL cMillies) +{ + return rtR0ThreadSolSleepCommon(cMillies); +} + + +RTDECL(bool) RTThreadYield(void) +{ + RT_ASSERT_PREEMPTIBLE(); + + RTTHREADPREEMPTSTATE PreemptState = RTTHREADPREEMPTSTATE_INITIALIZER; + RTThreadPreemptDisable(&PreemptState); + + char const bThreadPreempt = SOL_THREAD_PREEMPT; + char const bForcePreempt = SOL_CPU_KPRUNRUN; + bool fWillYield = false; + Assert(bThreadPreempt >= 1); + + /* + * If we are the last preemption enabler for this thread and if force + * preemption is set on the CPU, only then we are guaranteed to be preempted. + */ + if (bThreadPreempt == 1 && bForcePreempt != 0) + fWillYield = true; + + RTThreadPreemptRestore(&PreemptState); + return fWillYield; +} + + +RTDECL(bool) RTThreadPreemptIsEnabled(RTTHREAD hThread) +{ + Assert(hThread == NIL_RTTHREAD); + if (RT_UNLIKELY(g_frtSolInitDone == false)) + { + cmn_err(CE_CONT, "!RTThreadPreemptIsEnabled called before RTR0Init!\n"); + return true; + } + + bool fThreadPreempt = false; + if (SOL_THREAD_PREEMPT == 0) + fThreadPreempt = true; + + if (!fThreadPreempt) + return false; +#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) + if (!ASMIntAreEnabled()) + return false; +#endif + if (getpil() >= DISP_LEVEL) + return false; + return true; +} + + +RTDECL(bool) RTThreadPreemptIsPending(RTTHREAD hThread) +{ + Assert(hThread == NIL_RTTHREAD); + + char const bPreempt = SOL_CPU_RUNRUN; + char const bForcePreempt = SOL_CPU_KPRUNRUN; + return (bPreempt != 0 || bForcePreempt != 0); +} + + +RTDECL(bool) RTThreadPreemptIsPendingTrusty(void) +{ + /* yes, RTThreadPreemptIsPending is reliable. */ + return true; +} + + +RTDECL(bool) RTThreadPreemptIsPossible(void) +{ + /* yes, kernel preemption is possible. */ + return true; +} + + +RTDECL(void) RTThreadPreemptDisable(PRTTHREADPREEMPTSTATE pState) +{ + AssertPtr(pState); + + SOL_THREAD_PREEMPT++; + Assert(SOL_THREAD_PREEMPT >= 1); + + RT_ASSERT_PREEMPT_CPUID_DISABLE(pState); +} + + +RTDECL(void) RTThreadPreemptRestore(PRTTHREADPREEMPTSTATE pState) +{ + AssertPtr(pState); + RT_ASSERT_PREEMPT_CPUID_RESTORE(pState); + + Assert(SOL_THREAD_PREEMPT >= 1); + if (--SOL_THREAD_PREEMPT == 0 && SOL_CPU_RUNRUN != 0) + kpreempt(KPREEMPT_SYNC); +} + + +RTDECL(bool) RTThreadIsInInterrupt(RTTHREAD hThread) +{ + Assert(hThread == NIL_RTTHREAD); + return servicing_interrupt() ? true : false; +} + |