| 1 | /* $Id: sched-os2.cpp 44528 2013-02-04 14:27:54Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Scheduling, OS/2
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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 | /** @def OS2_SCHED_ENABLED
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| 28 | * Enables the priority scheme. */
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| 29 | #define OS2_SCHED_ENABLED
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| 30 |
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| 31 |
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| 32 | /*******************************************************************************
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| 33 | * Header Files *
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| 34 | *******************************************************************************/
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| 35 | #define LOG_GROUP RTLOGGROUP_THREAD
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| 36 | #define INCL_BASE
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| 37 | #define INCL_ERRORS
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| 38 | #include <os2.h>
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| 39 |
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| 40 | #include <iprt/thread.h>
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| 41 | #include <iprt/log.h>
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| 42 | #include <iprt/assert.h>
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| 43 | #include <iprt/err.h>
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| 44 | #include "internal/sched.h"
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| 45 | #include "internal/thread.h"
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| 46 |
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| 47 |
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| 48 | /*******************************************************************************
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| 49 | * Structures and Typedefs *
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| 50 | *******************************************************************************/
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| 51 | /**
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| 52 | * Configuration of one priority.
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| 53 | */
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| 54 | typedef struct
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| 55 | {
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| 56 | /** The priority. */
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| 57 | RTPROCPRIORITY enmPriority;
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| 58 | /** The name of this priority. */
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| 59 | const char *pszName;
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| 60 | /** Array scheduler attributes corresponding to each of the thread types. */
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| 61 | struct
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| 62 | {
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| 63 | /** For sanity include the array index. */
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| 64 | RTTHREADTYPE enmType;
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| 65 | /** The OS/2 priority class. */
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| 66 | ULONG ulClass;
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| 67 | /** The OS/2 priority delta. */
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| 68 | ULONG ulDelta;
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| 69 | } aTypes[RTTHREADTYPE_END];
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| 70 | } PROCPRIORITY;
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| 71 |
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| 72 | /** Matches any process priority class. */
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| 73 | #define ANY_PROCESS_PRIORITY_CLASS (~0U)
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| 74 |
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| 75 |
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| 76 | /*******************************************************************************
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| 77 | * Global Variables *
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| 78 | *******************************************************************************/
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| 79 | /**
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| 80 | * Array of static priority configurations.
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| 81 | */
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| 82 | static const PROCPRIORITY g_aPriorities[] =
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| 83 | {
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| 84 | {
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| 85 | RTPROCPRIORITY_FLAT, "Flat",
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| 86 | {
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| 87 | { RTTHREADTYPE_INVALID, ~0, ~0 },
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| 88 | { RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_REGULAR, 0 },
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| 89 | { RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_REGULAR, 0 },
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| 90 | { RTTHREADTYPE_EMULATION, PRTYC_REGULAR, 0 },
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| 91 | { RTTHREADTYPE_DEFAULT, PRTYC_REGULAR, 0 },
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| 92 | { RTTHREADTYPE_GUI, PRTYC_REGULAR, 0 },
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| 93 | { RTTHREADTYPE_MAIN_WORKER, PRTYC_REGULAR, 0 },
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| 94 | { RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 0 },
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| 95 | { RTTHREADTYPE_DEBUGGER, PRTYC_REGULAR, 0 },
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| 96 | { RTTHREADTYPE_MSG_PUMP, PRTYC_REGULAR, 0 },
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| 97 | { RTTHREADTYPE_IO, PRTYC_REGULAR, 0 },
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| 98 | { RTTHREADTYPE_TIMER, PRTYC_REGULAR, 0 }
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| 99 | }
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| 100 | },
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| 101 | {
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| 102 | RTPROCPRIORITY_LOW, "Low",
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| 103 | {
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| 104 | { RTTHREADTYPE_INVALID, ~0 },
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| 105 | { RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_IDLETIME, 0 },
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| 106 | { RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_IDLETIME, 0 },
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| 107 | { RTTHREADTYPE_EMULATION, PRTYC_IDLETIME, 0 },
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| 108 | { RTTHREADTYPE_DEFAULT, PRTYC_IDLETIME, 30 },
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| 109 | { RTTHREADTYPE_GUI, PRTYC_IDLETIME, 30 },
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| 110 | { RTTHREADTYPE_MAIN_WORKER, PRTYC_IDLETIME, 30 },
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| 111 | { RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 0 },
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| 112 | { RTTHREADTYPE_DEBUGGER, PRTYC_REGULAR, 0 },
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| 113 | { RTTHREADTYPE_MSG_PUMP, PRTYC_REGULAR, 0 },
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| 114 | { RTTHREADTYPE_IO, PRTYC_REGULAR, 0 },
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| 115 | { RTTHREADTYPE_TIMER, PRTYC_REGULAR, 0 }
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| 116 | }
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| 117 | },
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| 118 | {
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| 119 | RTPROCPRIORITY_NORMAL, "Normal",
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| 120 | {
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| 121 | { RTTHREADTYPE_INVALID, ~0 },
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| 122 | { RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_IDLETIME, 30 },
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| 123 | { RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_IDLETIME, 31 },
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| 124 | { RTTHREADTYPE_EMULATION, PRTYC_REGULAR, 0 },
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| 125 | { RTTHREADTYPE_DEFAULT, PRTYC_REGULAR, 5 },
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| 126 | { RTTHREADTYPE_GUI, PRTYC_REGULAR, 10 },
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| 127 | { RTTHREADTYPE_MAIN_WORKER, PRTYC_REGULAR, 12 },
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| 128 | { RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 15 },
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| 129 | { RTTHREADTYPE_DEBUGGER, PRTYC_REGULAR, 20 },
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| 130 | { RTTHREADTYPE_MSG_PUMP, PRTYC_REGULAR, 25 },
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| 131 | { RTTHREADTYPE_IO, PRTYC_FOREGROUNDSERVER, 5 },
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| 132 | { RTTHREADTYPE_TIMER, PRTYC_TIMECRITICAL, 0 }
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| 133 | }
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| 134 | },
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| 135 | {
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| 136 | RTPROCPRIORITY_HIGH, "High",
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| 137 | {
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| 138 | { RTTHREADTYPE_INVALID, ~0 },
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| 139 | { RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_IDLETIME, 30 },
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| 140 | { RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_REGULAR, 0 },
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| 141 | { RTTHREADTYPE_EMULATION, PRTYC_REGULAR, 0 },
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| 142 | { RTTHREADTYPE_DEFAULT, PRTYC_REGULAR, 15 },
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| 143 | { RTTHREADTYPE_GUI, PRTYC_REGULAR, 20 },
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| 144 | { RTTHREADTYPE_MAIN_WORKER, PRTYC_REGULAR, 25 },
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| 145 | { RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 30 },
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| 146 | { RTTHREADTYPE_DEBUGGER, PRTYC_TIMECRITICAL, 2 },
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| 147 | { RTTHREADTYPE_MSG_PUMP, PRTYC_TIMECRITICAL, 3 },
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| 148 | { RTTHREADTYPE_IO, PRTYC_TIMECRITICAL, 4 },
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| 149 | { RTTHREADTYPE_TIMER, PRTYC_TIMECRITICAL, 5 }
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| 150 | }
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| 151 | }
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| 152 | };
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| 153 |
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| 154 | /**
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| 155 | * The dynamic default priority configuration.
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| 156 | *
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| 157 | * This can be recalulated at runtime depending on what the
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| 158 | * system allow us to do. Presently we don't do this as it's
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| 159 | * generally not a bit issue on OS/2 hosts.
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| 160 | */
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| 161 | static PROCPRIORITY g_aDefaultPriority =
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| 162 | {
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| 163 | RTPROCPRIORITY_LOW, "Default",
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| 164 | {
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| 165 | { RTTHREADTYPE_INVALID, ~0 },
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| 166 | { RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_IDLETIME, 30 },
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| 167 | { RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_IDLETIME, 31 },
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| 168 | { RTTHREADTYPE_EMULATION, PRTYC_REGULAR, 0 },
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| 169 | { RTTHREADTYPE_DEFAULT, PRTYC_REGULAR, 5 },
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| 170 | { RTTHREADTYPE_GUI, PRTYC_REGULAR, 10 },
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| 171 | { RTTHREADTYPE_MAIN_WORKER, PRTYC_REGULAR, 12 },
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| 172 | { RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 15 },
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| 173 | { RTTHREADTYPE_DEBUGGER, PRTYC_REGULAR, 20 },
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| 174 | { RTTHREADTYPE_MSG_PUMP, PRTYC_REGULAR, 25 },
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| 175 | { RTTHREADTYPE_IO, PRTYC_FOREGROUNDSERVER, 5 },
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| 176 | { RTTHREADTYPE_TIMER, PRTYC_TIMECRITICAL, 0 }
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| 177 | }
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| 178 | };
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| 179 |
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| 180 |
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| 181 | /** Pointer to the current priority configuration. */
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| 182 | static const PROCPRIORITY *g_pProcessPriority = &g_aDefaultPriority;
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| 183 |
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| 184 |
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| 185 | /**
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| 186 | * Calculate the scheduling properties for all the threads in the default
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| 187 | * process priority, assuming the current thread have the type enmType.
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| 188 | *
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| 189 | * @returns iprt status code.
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| 190 | * @param enmType The thread type to be assumed for the current thread.
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| 191 | */
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| 192 | DECLHIDDEN(int) rtSchedNativeCalcDefaultPriority(RTTHREADTYPE enmType)
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| 193 | {
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| 194 | Assert(enmType > RTTHREADTYPE_INVALID && enmType < RTTHREADTYPE_END);
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| 195 | return VINF_SUCCESS;
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| 196 | }
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| 197 |
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| 198 |
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| 199 | /**
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| 200 | * Validates and sets the process priority.
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| 201 | * This will check that all rtThreadNativeSetPriority() will success for all the
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| 202 | * thread types when applied to the current thread.
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| 203 | *
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| 204 | * @returns iprt status code.
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| 205 | * @param enmPriority The priority to validate and set.
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| 206 | * @remark Located in sched.
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| 207 | */
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| 208 | DECLHIDDEN(int) rtProcNativeSetPriority(RTPROCPRIORITY enmPriority)
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| 209 | {
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| 210 | Assert(enmPriority > RTPROCPRIORITY_INVALID && enmPriority < RTPROCPRIORITY_LAST);
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| 211 | return VINF_SUCCESS;
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| 212 | }
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| 213 |
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| 214 |
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| 215 | /**
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| 216 | * Sets the priority of the thread according to the thread type
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| 217 | * and current process priority.
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| 218 | *
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| 219 | * The RTTHREADINT::enmType member has not yet been updated and will be updated by
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| 220 | * the caller on a successful return.
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| 221 | *
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| 222 | * @returns iprt status code.
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| 223 | * @param pThread The thread in question.
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| 224 | * @param enmType The thread type.
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| 225 | * @remark Located in sched.
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| 226 | */
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| 227 | DECLHIDDEN(int) rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType)
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| 228 | {
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| 229 | Assert(enmType > RTTHREADTYPE_INVALID && enmType < RTTHREADTYPE_END);
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| 230 | AssertMsg(g_pProcessPriority && g_pProcessPriority->aTypes[enmType].enmType == enmType,
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| 231 | ("enmType=%d entry=%d\n", enmType, g_pProcessPriority->aTypes[enmType].enmType));
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| 232 |
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| 233 | #ifdef OS2_SCHED_ENABLED
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| 234 | APIRET rc = DosSetPriority(PRTYS_THREAD, g_pProcessPriority->aTypes[enmType].ulClass, g_pProcessPriority->aTypes[enmType].ulDelta, (ULONG)pThread->Core.Key & 0xffff /*tid*/);
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| 235 | AssertMsg(rc == NO_ERROR, ("%d\n", rc));
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| 236 | return RTErrConvertFromOS2(rc);
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| 237 | #else
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| 238 | return VINF_SUCCESS;
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| 239 | #endif
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| 240 | }
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| 241 |
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