| 1 | /* $Id: thread2-r0drv-linux.c 42784 2012-08-12 20:31:36Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Threads (Part 2), Ring-0 Driver, Linux.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2011 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*******************************************************************************
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| 29 | * Header Files *
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| 30 | *******************************************************************************/
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| 31 | #include "the-linux-kernel.h"
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| 32 | #include "internal/iprt.h"
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| 33 |
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| 34 | #include <iprt/assert.h>
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| 35 | #include <iprt/thread.h>
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| 36 | #include <iprt/err.h>
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| 37 | #include "internal/thread.h"
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| 38 |
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| 39 |
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| 40 | RTDECL(RTTHREAD) RTThreadSelf(void)
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| 41 | {
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| 42 | return rtThreadGetByNative((RTNATIVETHREAD)current);
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| 43 | }
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| 44 |
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| 45 |
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| 46 | DECLHIDDEN(int) rtThreadNativeInit(void)
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| 47 | {
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| 48 | return VINF_SUCCESS;
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| 49 | }
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| 50 |
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| 51 |
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| 52 | DECLHIDDEN(int) rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType)
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| 53 | {
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| 54 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 11)
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| 55 | /* See comment near MAX_RT_PRIO in linux/sched.h for details on
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| 56 | sched_priority. */
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| 57 | int iSchedClass = SCHED_NORMAL;
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| 58 | struct sched_param Param = { .sched_priority = MAX_PRIO - 1 };
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| 59 | switch (enmType)
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| 60 | {
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| 61 | case RTTHREADTYPE_INFREQUENT_POLLER:
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| 62 | Param.sched_priority = MAX_RT_PRIO + 5;
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| 63 | break;
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| 64 |
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| 65 | case RTTHREADTYPE_EMULATION:
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| 66 | Param.sched_priority = MAX_RT_PRIO + 4;
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| 67 | break;
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| 68 |
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| 69 | case RTTHREADTYPE_DEFAULT:
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| 70 | Param.sched_priority = MAX_RT_PRIO + 3;
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| 71 | break;
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| 72 |
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| 73 | case RTTHREADTYPE_MSG_PUMP:
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| 74 | Param.sched_priority = MAX_RT_PRIO + 2;
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| 75 | break;
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| 76 |
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| 77 | case RTTHREADTYPE_IO:
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| 78 | iSchedClass = SCHED_FIFO;
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| 79 | Param.sched_priority = MAX_RT_PRIO - 1;
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| 80 | break;
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| 81 |
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| 82 | case RTTHREADTYPE_TIMER:
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| 83 | iSchedClass = SCHED_FIFO;
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| 84 | Param.sched_priority = 1; /* not 0 just in case */
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| 85 | break;
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| 86 |
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| 87 | default:
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| 88 | AssertMsgFailed(("enmType=%d\n", enmType));
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| 89 | return VERR_INVALID_PARAMETER;
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| 90 | }
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| 91 |
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| 92 | sched_setscheduler(current, iSchedClass, &Param);
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| 93 | #endif
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| 94 |
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| 95 | return VINF_SUCCESS;
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| 96 | }
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| 97 |
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| 98 |
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| 99 | DECLHIDDEN(int) rtThreadNativeAdopt(PRTTHREADINT pThread)
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| 100 | {
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| 101 | return VERR_NOT_IMPLEMENTED;
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| 102 | }
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| 103 |
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| 104 |
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| 105 | DECLHIDDEN(void) rtThreadNativeDestroy(PRTTHREADINT pThread)
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| 106 | {
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| 107 | NOREF(pThread);
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| 108 | }
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| 109 |
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| 110 |
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| 111 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 4)
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| 112 | /**
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| 113 | * Native kernel thread wrapper function.
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| 114 | *
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| 115 | * This will forward to rtThreadMain and do termination upon return.
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| 116 | *
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| 117 | * @param pvArg Pointer to the argument package.
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| 118 | */
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| 119 | static int rtThreadNativeMain(void *pvArg)
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| 120 | {
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| 121 | PRTTHREADINT pThread = (PRTTHREADINT)pvArg;
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| 122 |
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| 123 | rtThreadMain(pThread, (RTNATIVETHREAD)current, &pThread->szName[0]);
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| 124 | return 0;
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| 125 | }
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| 126 | #endif
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| 127 |
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| 128 |
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| 129 | DECLHIDDEN(int) rtThreadNativeCreate(PRTTHREADINT pThreadInt, PRTNATIVETHREAD pNativeThread)
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| 130 | {
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| 131 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 4)
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| 132 | struct task_struct *NativeThread;
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| 133 |
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| 134 | RT_ASSERT_PREEMPTIBLE();
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| 135 |
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| 136 | NativeThread = kthread_run(rtThreadNativeMain, pThreadInt, "iprt-%s", pThreadInt->szName);
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| 137 |
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| 138 | if (IS_ERR(NativeThread))
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| 139 | return VERR_GENERAL_FAILURE;
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| 140 |
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| 141 | *pNativeThread = (RTNATIVETHREAD)NativeThread;
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| 142 | return VINF_SUCCESS;
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| 143 | #else
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| 144 | return VERR_NOT_IMPLEMENTED;
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| 145 | #endif
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| 146 | }
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| 147 |
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