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/* $Id: thread2-r0drv-darwin.cpp $ */
/** @file
* IPRT - Threads (Part 2), Ring-0 Driver, Darwin.
*/
/*
* 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-darwin-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 "internal/thread.h"
DECLHIDDEN(int) rtThreadNativeInit(void)
{
/* No TLS in Ring-0. :-/ */
return VINF_SUCCESS;
}
RTDECL(RTTHREAD) RTThreadSelf(void)
{
return rtThreadGetByNative((RTNATIVETHREAD)current_thread());
}
DECLHIDDEN(int) rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType)
{
/*
* Convert the priority type to scheduling policies.
* (This is really just guess work.)
*/
bool fSetExtended = false;
thread_extended_policy Extended = { true };
bool fSetTimeContstraint = false;
thread_time_constraint_policy TimeConstraint = { 0, 0, 0, true };
thread_precedence_policy Precedence = { 0 };
switch (enmType)
{
case RTTHREADTYPE_INFREQUENT_POLLER:
Precedence.importance = 1;
break;
case RTTHREADTYPE_EMULATION:
Precedence.importance = 30;
break;
case RTTHREADTYPE_DEFAULT:
Precedence.importance = 31;
break;
case RTTHREADTYPE_MSG_PUMP:
Precedence.importance = 34;
break;
case RTTHREADTYPE_IO:
Precedence.importance = 98;
break;
case RTTHREADTYPE_TIMER:
Precedence.importance = 0x7fffffff;
fSetExtended = true;
Extended.timeshare = FALSE;
fSetTimeContstraint = true;
TimeConstraint.period = 0; /* not really true for a real timer thread, but we've really no idea. */
TimeConstraint.computation = rtDarwinAbsTimeFromNano(100000); /* 100 us*/
TimeConstraint.constraint = rtDarwinAbsTimeFromNano(500000); /* 500 us */
TimeConstraint.preemptible = FALSE;
break;
default:
AssertMsgFailed(("enmType=%d\n", enmType));
return VERR_INVALID_PARAMETER;
}
RT_ASSERT_INTS_ON();
/*
* Do the actual modification.
*/
kern_return_t kr = thread_policy_set((thread_t)pThread->Core.Key, THREAD_PRECEDENCE_POLICY,
(thread_policy_t)&Precedence, THREAD_PRECEDENCE_POLICY_COUNT);
AssertMsg(kr == KERN_SUCCESS, ("%rc\n", kr)); NOREF(kr);
if (fSetExtended)
{
kr = thread_policy_set((thread_t)pThread->Core.Key, THREAD_EXTENDED_POLICY,
(thread_policy_t)&Extended, THREAD_EXTENDED_POLICY_COUNT);
AssertMsg(kr == KERN_SUCCESS, ("%rc\n", kr));
}
if (fSetTimeContstraint)
{
kr = thread_policy_set((thread_t)pThread->Core.Key, THREAD_TIME_CONSTRAINT_POLICY,
(thread_policy_t)&TimeConstraint, THREAD_TIME_CONSTRAINT_POLICY_COUNT);
AssertMsg(kr == KERN_SUCCESS, ("%rc\n", kr));
}
return VINF_SUCCESS; /* ignore any errors for now */
}
DECLHIDDEN(int) rtThreadNativeAdopt(PRTTHREADINT pThread)
{
RT_NOREF(pThread);
return VERR_NOT_IMPLEMENTED;
}
DECLHIDDEN(void) rtThreadNativeWaitKludge(PRTTHREADINT pThread)
{
RT_NOREF(pThread);
/** @todo fix RTThreadWait/RTR0Term race on darwin. */
RTThreadSleep(1);
}
DECLHIDDEN(void) rtThreadNativeDestroy(PRTTHREADINT pThread)
{
RT_NOREF(pThread);
}
/**
* Native kernel thread wrapper function.
*
* This will forward to rtThreadMain and do termination upon return.
*
* @param pvArg Pointer to the argument package.
* @param Ignored Wait result, which we ignore.
*/
static void rtThreadNativeMain(void *pvArg, wait_result_t Ignored)
{
RT_NOREF(Ignored);
const thread_t Self = current_thread();
PRTTHREADINT pThread = (PRTTHREADINT)pvArg;
rtThreadMain(pThread, (RTNATIVETHREAD)Self, &pThread->szName[0]);
kern_return_t kr = thread_terminate(Self);
AssertFatalMsgFailed(("kr=%d\n", kr));
}
DECLHIDDEN(int) rtThreadNativeCreate(PRTTHREADINT pThreadInt, PRTNATIVETHREAD pNativeThread)
{
RT_ASSERT_PREEMPTIBLE();
IPRT_DARWIN_SAVE_EFL_AC();
thread_t NativeThread;
kern_return_t kr = kernel_thread_start(rtThreadNativeMain, pThreadInt, &NativeThread);
if (kr == KERN_SUCCESS)
{
*pNativeThread = (RTNATIVETHREAD)NativeThread;
thread_deallocate(NativeThread);
IPRT_DARWIN_RESTORE_EFL_AC();
return VINF_SUCCESS;
}
IPRT_DARWIN_RESTORE_EFL_AC();
return RTErrConvertFromMachKernReturn(kr);
}
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