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/* $Id: sched-os2.cpp $ */
/** @file
* IPRT - Scheduling, OS/2
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/** @def OS2_SCHED_ENABLED
* Enables the priority scheme. */
#define OS2_SCHED_ENABLED
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_THREAD
#define INCL_BASE
#define INCL_ERRORS
#include <os2.h>
#include <iprt/thread.h>
#include <iprt/log.h>
#include <iprt/assert.h>
#include <iprt/errcore.h>
#include "internal/sched.h"
#include "internal/thread.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* Configuration of one priority.
*/
typedef struct
{
/** The priority. */
RTPROCPRIORITY enmPriority;
/** The name of this priority. */
const char *pszName;
/** Array scheduler attributes corresponding to each of the thread types. */
struct
{
/** For sanity include the array index. */
RTTHREADTYPE enmType;
/** The OS/2 priority class. */
ULONG ulClass;
/** The OS/2 priority delta. */
ULONG ulDelta;
} aTypes[RTTHREADTYPE_END];
} PROCPRIORITY;
/** Matches any process priority class. */
#define ANY_PROCESS_PRIORITY_CLASS (~0U)
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/**
* Array of static priority configurations.
*/
static const PROCPRIORITY g_aPriorities[] =
{
{
RTPROCPRIORITY_FLAT, "Flat",
{
{ RTTHREADTYPE_INVALID, ~0, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_EMULATION, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_DEFAULT, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_GUI, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_MAIN_WORKER, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_DEBUGGER, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_MSG_PUMP, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_IO, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_TIMER, PRTYC_REGULAR, 0 }
}
},
{
RTPROCPRIORITY_LOW, "Low",
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_IDLETIME, 0 },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_IDLETIME, 0 },
{ RTTHREADTYPE_EMULATION, PRTYC_IDLETIME, 0 },
{ RTTHREADTYPE_DEFAULT, PRTYC_IDLETIME, 30 },
{ RTTHREADTYPE_GUI, PRTYC_IDLETIME, 30 },
{ RTTHREADTYPE_MAIN_WORKER, PRTYC_IDLETIME, 30 },
{ RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_DEBUGGER, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_MSG_PUMP, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_IO, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_TIMER, PRTYC_REGULAR, 0 }
}
},
{
RTPROCPRIORITY_NORMAL, "Normal",
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_IDLETIME, 30 },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_IDLETIME, 31 },
{ RTTHREADTYPE_EMULATION, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_DEFAULT, PRTYC_REGULAR, 5 },
{ RTTHREADTYPE_GUI, PRTYC_REGULAR, 10 },
{ RTTHREADTYPE_MAIN_WORKER, PRTYC_REGULAR, 12 },
{ RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 15 },
{ RTTHREADTYPE_DEBUGGER, PRTYC_REGULAR, 20 },
{ RTTHREADTYPE_MSG_PUMP, PRTYC_REGULAR, 25 },
{ RTTHREADTYPE_IO, PRTYC_FOREGROUNDSERVER, 5 },
{ RTTHREADTYPE_TIMER, PRTYC_TIMECRITICAL, 0 }
}
},
{
RTPROCPRIORITY_HIGH, "High",
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_IDLETIME, 30 },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_EMULATION, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_DEFAULT, PRTYC_REGULAR, 15 },
{ RTTHREADTYPE_GUI, PRTYC_REGULAR, 20 },
{ RTTHREADTYPE_MAIN_WORKER, PRTYC_REGULAR, 25 },
{ RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 30 },
{ RTTHREADTYPE_DEBUGGER, PRTYC_TIMECRITICAL, 2 },
{ RTTHREADTYPE_MSG_PUMP, PRTYC_TIMECRITICAL, 3 },
{ RTTHREADTYPE_IO, PRTYC_TIMECRITICAL, 4 },
{ RTTHREADTYPE_TIMER, PRTYC_TIMECRITICAL, 5 }
}
}
};
/**
* The dynamic default priority configuration.
*
* This can be recalulated at runtime depending on what the
* system allow us to do. Presently we don't do this as it's
* generally not a bit issue on OS/2 hosts.
*/
static PROCPRIORITY g_aDefaultPriority =
{
RTPROCPRIORITY_LOW, "Default",
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, PRTYC_IDLETIME, 30 },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, PRTYC_IDLETIME, 31 },
{ RTTHREADTYPE_EMULATION, PRTYC_REGULAR, 0 },
{ RTTHREADTYPE_DEFAULT, PRTYC_REGULAR, 5 },
{ RTTHREADTYPE_GUI, PRTYC_REGULAR, 10 },
{ RTTHREADTYPE_MAIN_WORKER, PRTYC_REGULAR, 12 },
{ RTTHREADTYPE_VRDP_IO, PRTYC_REGULAR, 15 },
{ RTTHREADTYPE_DEBUGGER, PRTYC_REGULAR, 20 },
{ RTTHREADTYPE_MSG_PUMP, PRTYC_REGULAR, 25 },
{ RTTHREADTYPE_IO, PRTYC_FOREGROUNDSERVER, 5 },
{ RTTHREADTYPE_TIMER, PRTYC_TIMECRITICAL, 0 }
}
};
/** Pointer to the current priority configuration. */
static const PROCPRIORITY *g_pProcessPriority = &g_aDefaultPriority;
/**
* Calculate the scheduling properties for all the threads in the default
* process priority, assuming the current thread have the type enmType.
*
* @returns iprt status code.
* @param enmType The thread type to be assumed for the current thread.
*/
DECLHIDDEN(int) rtSchedNativeCalcDefaultPriority(RTTHREADTYPE enmType)
{
Assert(enmType > RTTHREADTYPE_INVALID && enmType < RTTHREADTYPE_END);
return VINF_SUCCESS;
}
/**
* Validates and sets the process priority.
* This will check that all rtThreadNativeSetPriority() will success for all the
* thread types when applied to the current thread.
*
* @returns iprt status code.
* @param enmPriority The priority to validate and set.
* @remark Located in sched.
*/
DECLHIDDEN(int) rtProcNativeSetPriority(RTPROCPRIORITY enmPriority)
{
Assert(enmPriority > RTPROCPRIORITY_INVALID && enmPriority < RTPROCPRIORITY_LAST);
if (enmPriority == RTPROCPRIORITY_DEFAULT)
{
g_pProcessPriority = &g_aDefaultPriority;
return VINF_SUCCESS;
}
for (size_t i = 0; i < RT_ELEMENTS(g_aPriorities); i++)
if (g_aPriorities[i].enmPriority == enmPriority)
{
g_pProcessPriority = &g_aPriorities[i];
return VINF_SUCCESS;
}
AssertFailedReturn(VERR_INTERNAL_ERROR);
}
/**
* Sets the priority of the thread according to the thread type
* and current process priority.
*
* The RTTHREADINT::enmType member has not yet been updated and will be updated by
* the caller on a successful return.
*
* @returns iprt status code.
* @param pThread The thread in question.
* @param enmType The thread type.
* @remark Located in sched.
*/
DECLHIDDEN(int) rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType)
{
Assert(enmType > RTTHREADTYPE_INVALID && enmType < RTTHREADTYPE_END);
AssertMsg(g_pProcessPriority && g_pProcessPriority->aTypes[enmType].enmType == enmType,
("enmType=%d entry=%d\n", enmType, g_pProcessPriority->aTypes[enmType].enmType));
#ifdef OS2_SCHED_ENABLED
APIRET rc = DosSetPriority(PRTYS_THREAD, g_pProcessPriority->aTypes[enmType].ulClass, g_pProcessPriority->aTypes[enmType].ulDelta, (ULONG)pThread->Core.Key & 0xffff /*tid*/);
AssertMsg(rc == NO_ERROR, ("%d\n", rc));
return RTErrConvertFromOS2(rc);
#else
return VINF_SUCCESS;
#endif
}
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