VirtualBox

source: vbox/trunk/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c@ 59983

Last change on this file since 59983 was 57358, checked in by vboxsync, 9 years ago

*: scm cleanup run.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id Revision
File size: 4.4 KB
Line 
1/* $Id: thread2-r0drv-linux.c 57358 2015-08-14 15:16:38Z vboxsync $ */
2/** @file
3 * IPRT - Threads (Part 2), Ring-0 Driver, Linux.
4 */
5
6/*
7 * Copyright (C) 2006-2015 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*********************************************************************************************************************************
29* Header Files *
30*********************************************************************************************************************************/
31#include "the-linux-kernel.h"
32#include "internal/iprt.h"
33
34#include <iprt/assert.h>
35#include <iprt/thread.h>
36#include <iprt/err.h>
37#include "internal/thread.h"
38
39
40RTDECL(RTTHREAD) RTThreadSelf(void)
41{
42 return rtThreadGetByNative((RTNATIVETHREAD)current);
43}
44
45
46DECLHIDDEN(int) rtThreadNativeInit(void)
47{
48 return VINF_SUCCESS;
49}
50
51
52DECLHIDDEN(int) rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType)
53{
54#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 11)
55 /* See comment near MAX_RT_PRIO in linux/sched.h for details on
56 sched_priority. */
57 int iSchedClass = SCHED_NORMAL;
58 struct sched_param Param = { .sched_priority = MAX_PRIO - 1 };
59 switch (enmType)
60 {
61 case RTTHREADTYPE_INFREQUENT_POLLER:
62 Param.sched_priority = MAX_RT_PRIO + 5;
63 break;
64
65 case RTTHREADTYPE_EMULATION:
66 Param.sched_priority = MAX_RT_PRIO + 4;
67 break;
68
69 case RTTHREADTYPE_DEFAULT:
70 Param.sched_priority = MAX_RT_PRIO + 3;
71 break;
72
73 case RTTHREADTYPE_MSG_PUMP:
74 Param.sched_priority = MAX_RT_PRIO + 2;
75 break;
76
77 case RTTHREADTYPE_IO:
78 iSchedClass = SCHED_FIFO;
79 Param.sched_priority = MAX_RT_PRIO - 1;
80 break;
81
82 case RTTHREADTYPE_TIMER:
83 iSchedClass = SCHED_FIFO;
84 Param.sched_priority = 1; /* not 0 just in case */
85 break;
86
87 default:
88 AssertMsgFailed(("enmType=%d\n", enmType));
89 return VERR_INVALID_PARAMETER;
90 }
91
92 sched_setscheduler(current, iSchedClass, &Param);
93#endif
94
95 return VINF_SUCCESS;
96}
97
98
99DECLHIDDEN(int) rtThreadNativeAdopt(PRTTHREADINT pThread)
100{
101 return VERR_NOT_IMPLEMENTED;
102}
103
104
105DECLHIDDEN(void) rtThreadNativeWaitKludge(PRTTHREADINT pThread)
106{
107 /** @todo fix RTThreadWait/RTR0Term race on linux. */
108 RTThreadSleep(1); NOREF(pThread);
109}
110
111
112DECLHIDDEN(void) rtThreadNativeDestroy(PRTTHREADINT pThread)
113{
114 NOREF(pThread);
115}
116
117
118#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 4)
119/**
120 * Native kernel thread wrapper function.
121 *
122 * This will forward to rtThreadMain and do termination upon return.
123 *
124 * @param pvArg Pointer to the argument package.
125 */
126static int rtThreadNativeMain(void *pvArg)
127{
128 PRTTHREADINT pThread = (PRTTHREADINT)pvArg;
129
130 rtThreadMain(pThread, (RTNATIVETHREAD)current, &pThread->szName[0]);
131 return 0;
132}
133#endif
134
135
136DECLHIDDEN(int) rtThreadNativeCreate(PRTTHREADINT pThreadInt, PRTNATIVETHREAD pNativeThread)
137{
138#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 4)
139 struct task_struct *NativeThread;
140 IPRT_LINUX_SAVE_EFL_AC();
141
142 RT_ASSERT_PREEMPTIBLE();
143
144 NativeThread = kthread_run(rtThreadNativeMain, pThreadInt, "iprt-%s", pThreadInt->szName);
145
146 if (!IS_ERR(NativeThread))
147 {
148 *pNativeThread = (RTNATIVETHREAD)NativeThread;
149 IPRT_LINUX_RESTORE_EFL_AC();
150 return VINF_SUCCESS;
151 }
152 IPRT_LINUX_RESTORE_EFL_AC();
153 return VERR_GENERAL_FAILURE;
154#else
155 return VERR_NOT_IMPLEMENTED;
156#endif
157}
158
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