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pdmthread.h

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/** @file
 * PDM - Pluggable Device Manager, Threads. (VMM)
 */

/*
 * Copyright (C) 2006-2010 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.
 */

#ifndef ___VBox_pdmthread_h
#define ___VBox_pdmthread_h

#include <VBox/cdefs.h>
#include <VBox/types.h>
#ifdef IN_RING3
# include <iprt/thread.h>
#endif

RT_C_DECLS_BEGIN

/** @defgroup grp_pdm_thread    The PDM Threads API
 * @ingroup grp_pdm
 * @{
 */

/**
 * The thread state
 */
00045 typedef enum PDMTHREADSTATE
{
    /** The usual invalid 0 entry. */
00048     PDMTHREADSTATE_INVALID = 0,
    /** The thread is initializing.
     * Prev state: none
     * Next state: suspended, terminating (error) */
00052     PDMTHREADSTATE_INITIALIZING,
    /** The thread has been asked to suspend.
     * Prev state: running
     * Next state: suspended */
00056     PDMTHREADSTATE_SUSPENDING,
    /** The thread is supended.
     * Prev state: suspending, initializing
     * Next state: resuming, terminated. */
00060     PDMTHREADSTATE_SUSPENDED,
    /** The thread is active.
     * Prev state: suspended
     * Next state: running, terminating. */
00064     PDMTHREADSTATE_RESUMING,
    /** The thread is active.
     * Prev state: resuming
     * Next state: suspending, terminating. */
00068     PDMTHREADSTATE_RUNNING,
    /** The thread has been asked to terminate.
     * Prev state: initializing, suspended, resuming, running
     * Next state: terminated. */
00072     PDMTHREADSTATE_TERMINATING,
    /** The thread is terminating / has terminated.
     * Prev state: terminating
     * Next state: none */
00076     PDMTHREADSTATE_TERMINATED,
    /** The usual 32-bit hack. */
00078     PDMTHREADSTATE_32BIT_HACK = 0x7fffffff
} PDMTHREADSTATE;

/** A pointer to a PDM thread. */
typedef R3PTRTYPE(struct PDMTHREAD *) PPDMTHREAD;
/** A pointer to a pointer to a PDM thread. */
00084 typedef PPDMTHREAD *PPPDMTHREAD;

/**
 * PDM thread, device variation.
 *
 * @returns VBox status code.
 * @param   pDevIns     The device instance.
 * @param   pThread     The PDM thread data.
 */
00093 typedef int FNPDMTHREADDEV(PPDMDEVINS pDevIns, PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADDEV(). */
00095 typedef FNPDMTHREADDEV *PFNPDMTHREADDEV;

/**
 * PDM thread, USB device variation.
 *
 * @returns VBox status code.
 * @param   pUsbIns     The USB device instance.
 * @param   pThread     The PDM thread data.
 */
00104 typedef int FNPDMTHREADUSB(PPDMUSBINS pUsbIns, PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADUSB(). */
00106 typedef FNPDMTHREADUSB *PFNPDMTHREADUSB;

/**
 * PDM thread, driver variation.
 *
 * @returns VBox status code.
 * @param   pDrvIns     The driver instance.
 * @param   pThread     The PDM thread data.
 */
00115 typedef int FNPDMTHREADDRV(PPDMDRVINS pDrvIns, PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADDRV(). */
00117 typedef FNPDMTHREADDRV *PFNPDMTHREADDRV;

/**
 * PDM thread, driver variation.
 *
 * @returns VBox status code.
 * @param   pVM         The VM handle.
 * @param   pThread     The PDM thread data.
 */
00126 typedef int FNPDMTHREADINT(PVM pVM, PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADINT(). */
00128 typedef FNPDMTHREADINT *PFNPDMTHREADINT;

/**
 * PDM thread, driver variation.
 *
 * @returns VBox status code.
 * @param   pThread     The PDM thread data.
 */
00136 typedef int FNPDMTHREADEXT(PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADEXT(). */
00138 typedef FNPDMTHREADEXT *PFNPDMTHREADEXT;



/**
 * PDM thread wakeup call, device variation.
 *
 * @returns VBox status code.
 * @param   pDevIns     The device instance.
 * @param   pThread     The PDM thread data.
 */
00149 typedef int FNPDMTHREADWAKEUPDEV(PPDMDEVINS pDevIns, PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADDEV(). */
00151 typedef FNPDMTHREADWAKEUPDEV *PFNPDMTHREADWAKEUPDEV;

/**
 * PDM thread wakeup call, device variation.
 *
 * @returns VBox status code.
 * @param   pUsbIns     The USB device instance.
 * @param   pThread     The PDM thread data.
 */
00160 typedef int FNPDMTHREADWAKEUPUSB(PPDMUSBINS pUsbIns, PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADUSB(). */
00162 typedef FNPDMTHREADWAKEUPUSB *PFNPDMTHREADWAKEUPUSB;

/**
 * PDM thread wakeup call, driver variation.
 *
 * @returns VBox status code.
 * @param   pDrvIns     The driver instance.
 * @param   pThread     The PDM thread data.
 */
00171 typedef int FNPDMTHREADWAKEUPDRV(PPDMDRVINS pDrvIns, PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADDRV(). */
00173 typedef FNPDMTHREADWAKEUPDRV *PFNPDMTHREADWAKEUPDRV;

/**
 * PDM thread wakeup call, internal variation.
 *
 * @returns VBox status code.
 * @param   pVM         The VM handle.
 * @param   pThread     The PDM thread data.
 */
00182 typedef int FNPDMTHREADWAKEUPINT(PVM pVM, PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADWAKEUPINT(). */
00184 typedef FNPDMTHREADWAKEUPINT *PFNPDMTHREADWAKEUPINT;

/**
 * PDM thread wakeup call, external variation.
 *
 * @returns VBox status code.
 * @param   pThread     The PDM thread data.
 */
00192 typedef int FNPDMTHREADWAKEUPEXT(PPDMTHREAD pThread);
/** Pointer to a FNPDMTHREADEXT(). */
00194 typedef FNPDMTHREADWAKEUPEXT *PFNPDMTHREADWAKEUPEXT;


/**
 * PDM Thread instance data.
 */
00200 typedef struct PDMTHREAD
{
    /** PDMTHREAD_VERSION. */
00203     uint32_t                    u32Version;
    /** The thread state. */
00205     PDMTHREADSTATE volatile     enmState;
    /** The thread handle. */
00207     RTTHREAD                    Thread;
    /** The user parameter. */
    R3PTRTYPE(void *)           pvUser;
    /** Data specific to the kind of thread.
     * This should really be in PDMTHREADINT, but is placed here because of the
     * function pointer typedefs. So, don't touch these, please.
     */
    union
    {
        /** PDMTHREADTYPE_DEVICE data. */
        struct
        {
            /** The device instance. */
00220             PPDMDEVINSR3                        pDevIns;
            /** The thread function. */
            R3PTRTYPE(PFNPDMTHREADDEV)          pfnThread;
            /** Thread. */
            R3PTRTYPE(PFNPDMTHREADWAKEUPDEV)    pfnWakeUp;
        } Dev;

        /** PDMTHREADTYPE_USB data. */
        struct
        {
            /** The device instance. */
00231             PPDMUSBINS                          pUsbIns;
            /** The thread function. */
            R3PTRTYPE(PFNPDMTHREADUSB)          pfnThread;
            /** Thread. */
            R3PTRTYPE(PFNPDMTHREADWAKEUPUSB)    pfnWakeUp;
        } Usb;

        /** PDMTHREADTYPE_DRIVER data. */
        struct
        {
            /** The driver instance. */
            R3PTRTYPE(PPDMDRVINS)               pDrvIns;
            /** The thread function. */
            R3PTRTYPE(PFNPDMTHREADDRV)          pfnThread;
            /** Thread. */
            R3PTRTYPE(PFNPDMTHREADWAKEUPDRV)    pfnWakeUp;
        } Drv;

        /** PDMTHREADTYPE_INTERNAL data. */
        struct
        {
            /** The thread function. */
            R3PTRTYPE(PFNPDMTHREADINT)          pfnThread;
            /** Thread. */
            R3PTRTYPE(PFNPDMTHREADWAKEUPINT)    pfnWakeUp;
        } Int;

        /** PDMTHREADTYPE_EXTERNAL data. */
        struct
        {
            /** The thread function. */
            R3PTRTYPE(PFNPDMTHREADEXT)          pfnThread;
            /** Thread. */
            R3PTRTYPE(PFNPDMTHREADWAKEUPEXT)    pfnWakeUp;
        } Ext;
    } u;

    /** Internal data. */
    union
    {
#ifdef PDMTHREADINT_DECLARED
        PDMTHREADINT            s;
#endif
        uint8_t                 padding[64];
    } Internal;
} PDMTHREAD;

/** PDMTHREAD::u32Version value. */
00279 #define PDMTHREAD_VERSION                       PDM_VERSION_MAKE(0xefff, 1, 0)

#ifdef IN_RING3
VMMR3DECL(int) PDMR3ThreadCreate(PVM pVM, PPPDMTHREAD ppThread, void *pvUser, PFNPDMTHREADINT pfnThread,
                                 PFNPDMTHREADWAKEUPINT pfnWakeUp, size_t cbStack, RTTHREADTYPE enmType, const char *pszName);
VMMR3DECL(int) PDMR3ThreadCreateExternal(PVM pVM, PPPDMTHREAD ppThread, void *pvUser, PFNPDMTHREADEXT pfnThread,
                                         PFNPDMTHREADWAKEUPEXT pfnWakeUp, size_t cbStack, RTTHREADTYPE enmType, const char *pszName);
VMMR3DECL(int) PDMR3ThreadDestroy(PPDMTHREAD pThread, int *pRcThread);
VMMR3DECL(int) PDMR3ThreadIAmSuspending(PPDMTHREAD pThread);
VMMR3DECL(int) PDMR3ThreadIAmRunning(PPDMTHREAD pThread);
VMMR3DECL(int) PDMR3ThreadSleep(PPDMTHREAD pThread, RTMSINTERVAL cMillies);
VMMR3DECL(int) PDMR3ThreadSuspend(PPDMTHREAD pThread);
VMMR3DECL(int) PDMR3ThreadResume(PPDMTHREAD pThread);
#endif /* IN_RING3 */

/** @} */

RT_C_DECLS_END

#endif

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