+
−/*************************************************************************/
+
−/*                                                                       */
+
−/*               Copyright Mentor Graphics Corporation 2002              */
+
−/*                         All Rights Reserved.                          */
+
−/*                                                                       */
+
−/* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS  */
+
−/* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS   */
+
−/* SUBJECT TO LICENSE TERMS.                                             */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FILE NAME                                               VERSION       */
+
−/*                                                                       */
+
−/*      ioc.c                                          Nucleus PLUS 1.14 */
+
−/*                                                                       */
+
−/* COMPONENT                                                             */
+
−/*                                                                       */
+
−/*      IO - Input/Output Driver Management                              */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This file contains the core routines for the I/O Driver          */
+
−/*      Management component.                                            */
+
−/*                                                                       */
+
−/* DATA STRUCTURES                                                       */
+
−/*                                                                       */
+
−/*      None                                                             */
+
−/*                                                                       */
+
−/* FUNCTIONS                                                             */
+
−/*                                                                       */
+
−/*      IOC_Create_Driver                   Create an I/O driver         */
+
−/*      IOC_Delete_Driver                   Delete an I/O driver         */
+
−/*      IOC_Request_Driver                  Make an I/O driver request   */
+
−/*      IOC_Resume_Driver                   Resume a task suspended in   */
+
−/*                                            an I/O driver              */
+
−/*      IOC_Suspend_Driver                  Suspend a task inside an I/O */
+
−/*                                            driver                     */
+
−/*                                                                       */
+
−/* DEPENDENCIES                                                          */
+
−/*                                                                       */
+
−/*      cs_extr.h                           Common Service functions     */
+
−/*      tc_extr.h                           Thread Control functions     */
+
−/*      io_extr.h                           I/O driver functions         */
+
−/*      hi_extr.h                           History functions            */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*         DATE                    REMARKS                               */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*      08-09-1993      Corrected pointer retrieval                      */
+
−/*                      loop, resulting in version 1.0a                  */
+
−/*      08-09-1993      Verified version 1.0a                            */
+
−/*      03-01-1994      Moved non-core functions into                    */
+
−/*                      supplemental files, changed                      */
+
−/*                      function interfaces to match                     */
+
−/*                      those in prototype, changed                      */
+
−/*                      protection logic to reduce                       */
+
−/*                      overhead, resulting in                           */
+
−/*                      version 1.1                                      */
+
−/*                                                                       */
+
−/*      03-15-1994      Verified version 1.1                             */
+
−/*      04-17-1996      updated to version 1.2                           */
+
−/*      04-23-1996      Corrected SPR121.                                */
+
−/*      03-24-1998      Released version 1.3                             */
+
−/*      03-26-1999      Released 1.11m (new release                      */
+
−/*                        numbering scheme)                              */
+
−/*      04-07-1999      Release 1.11mA                                   */
+
−/*      04-17-2002      Released version 1.13m                           */
+
−/*      11-07-2002      Released version 1.14                            */
+
−/*************************************************************************/
+
−#define         NU_SOURCE_FILE
+
−
+
−
+
−#include        "cs_extr.h"                 /* Common service functions  */
+
−#include        "tc_extr.h"                 /* Thread control functions  */
+
−#include        "io_extr.h"                 /* I/O driver functions      */
+
−#include        "hi_extr.h"                 /* History functions         */
+
−#include        "profiler.h"                /* ProView interface         */
+
−
+
−/* Define external inner-component global data references.  */
+
−
+
−extern CS_NODE         *IOD_Created_Drivers_List;
+
−extern UNSIGNED         IOD_Total_Drivers;
+
−extern TC_PROTECT       IOD_List_Protect;
+
−
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      IOC_Create_Driver                                                */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function creates an I/O driver and places it on the list of */
+
−/*      created I/O drivers.  Note that this function does not actually  */
+
−/*      invoke the driver.                                               */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*      IOCE_Create_Driver                  Error checking shell         */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      CSC_Place_On_List                   Add node to linked-list      */
+
−/*      [HIC_Make_History_Entry]            Make entry in history log    */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*      TCT_Protect                         Data structure protect       */
+
−/*      TCT_Unprotect                       Un-protect data structure    */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      driver                              Driver control block pointer */
+
−/*      name                                Driver's logical name        */
+
−/*      driver_entry                        Driver's point of entry      */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      NU_SUCCESS                                                       */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*         DATE                    REMARKS                               */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−STATUS  IOC_Create_Driver(NU_DRIVER *driver, CHAR *name,
+
−                        VOID (*driver_entry)(NU_DRIVER *, NU_DRIVER_REQUEST *))
+
−{
+
−
+
−INT             i;                          /* Working index variable    */
+
−NU_SUPERV_USER_VARIABLES
+
−
+
−    /* Switch to supervisor mode */
+
−    NU_SUPERVISOR_MODE();
+
−
+
−#ifdef  NU_ENABLE_STACK_CHECK
+
−
+
−    /* Call stack checking function to check for an overflow condition.  */
+
−    TCT_Check_Stack();
+
−
+
−#endif
+
−
+
−#ifdef  NU_ENABLE_HISTORY
+
−
+
−    /* Make an entry that corresponds to this function in the system history
+
−       log.  */
+
−    HIC_Make_History_Entry(NU_CREATE_DRIVER_ID, (UNSIGNED) driver,
+
−                                (UNSIGNED) name, (UNSIGNED) driver_entry);
+
−
+
−#endif
+
−
+
−    /* First, clear the driver ID just in case it is an old Driver
+
−       Control Block.  */
+
−    driver -> nu_driver_id =             0;
+
−
+
−    /* Fill in the driver's name.  */
+
−    for (i = 0; i < NU_MAX_NAME; i++)
+
−        driver  -> nu_driver_name[i] =  name[i];
+
−
+
−    /* Save the driver's entry function in the control block.  */
+
−    driver -> nu_driver_entry =  driver_entry;
+
−
+
−    /* Protect against access to the list of created drivers.  */
+
−    TCT_Protect(&IOD_List_Protect);
+
−
+
−    /* At this point the driver  is completely built.  The ID can now be
+
−       set and it can be linked into the created driver  list.  */
+
−    driver  -> nu_driver_id =           IO_DRIVER_ID;
+
−
+
−    /* Link the driver  into the list of created I/O drivers and increment the
+
−       total number of drivers in the system.  */
+
−    CSC_Place_On_List(&IOD_Created_Drivers_List, (CS_NODE *) driver);
+
−    IOD_Total_Drivers++;
+
−
+
−#ifdef INCLUDE_PROVIEW
+
−    _RTProf_DumpDriver(RT_PROF_CREATE_DRIVER, driver, RT_PROF_OK);
+
−#endif /*INCLUDE_PROVIEW*/
+
−    /* Release protection against access to the list of created I/O drivers. */
+
−    TCT_Unprotect();
+
−
+
−    /* Return to user mode */
+
−    NU_USER_MODE();
+
−
+
−    /* Return successful completion.  */
+
−    return(NU_SUCCESS);
+
−}
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      IOC_Delete_Driver                                                */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function deletes an I/O driver and removes it from the list */
+
−/*      of created drivers.  Note that this function does not actually   */
+
−/*      invoke the driver.                                               */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*      IOCE_Delete_Driver                  Error checking shell         */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      CSC_Remove_From_List                Remove node from list        */
+
−/*      [HIC_Make_History_Entry]            Make entry in history log    */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*      TCT_Protect                         Protect created list         */
+
−/*      TCT_Unprotect                       Release protection           */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      driver                              Driver control block pointer */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      NU_SUCCESS                                                       */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*         DATE                    REMARKS                               */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−STATUS  IOC_Delete_Driver(NU_DRIVER *driver)
+
−{
+
−NU_SUPERV_USER_VARIABLES
+
−
+
−    /* Switch to supervisor mode */
+
−    NU_SUPERVISOR_MODE();
+
−
+
−#ifdef  NU_ENABLE_STACK_CHECK
+
−
+
−    /* Call stack checking function to check for an overflow condition.  */
+
−    TCT_Check_Stack();
+
−
+
−#endif
+
−
+
−#ifdef  NU_ENABLE_HISTORY
+
−
+
−    /* Make an entry that corresponds to this function in the system history
+
−       log.  */
+
−    HIC_Make_History_Entry(NU_DELETE_DRIVER_ID, (UNSIGNED) driver ,
+
−                                        (UNSIGNED) 0, (UNSIGNED) 0);
+
−
+
−#endif
+
−
+
−    /* Protect against access to the list of created I/O drivers.  */
+
−    TCT_Protect(&IOD_List_Protect);
+
−
+
−#ifdef INCLUDE_PROVIEW
+
−    _RTProf_DumpDriver(RT_PROF_DELETE_DRIVER, driver, RT_PROF_OK);
+
−#endif /*INCLUDE_PROVIEW*/
+
−    /* Set the driver ID to 0.  */
+
−    driver  -> nu_driver_id =  0;
+
−
+
−    /* Remove the driver from the list of created I/O drivers.  */
+
−    CSC_Remove_From_List(&IOD_Created_Drivers_List, (CS_NODE *) driver);
+
−
+
−    /* Decrement the total number of created I/O drivers.  */
+
−    IOD_Total_Drivers--;
+
−
+
−    /* Release protection against access to the list of created I/O drivers. */
+
−    TCT_Unprotect();
+
−
+
−    /* Return to user mode */
+
−    NU_USER_MODE();
+
−
+
−    /* Return a successful completion.  */
+
−    return(NU_SUCCESS);
+
−}
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      IOC_Request_Driver                                               */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function sends a user request to the specified I/O driver.  */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*      IOCE_Request_Driver                 Error checking shell         */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      [HIC_Make_History_Entry]            Make entry in history log    */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      driver                              Driver control block pointer */
+
−/*      request                             User's I/O request           */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      NU_SUCCESS                          If service is successful     */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*         DATE                    REMARKS                               */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−STATUS  IOC_Request_Driver(NU_DRIVER *driver , NU_DRIVER_REQUEST *request)
+
−{
+
−NU_SUPERV_USER_VARIABLES
+
−
+
−    /* Switch to supervisor mode */
+
−    NU_SUPERVISOR_MODE();
+
−
+
−#ifdef  NU_ENABLE_STACK_CHECK
+
−
+
−    /* Call stack checking function to check for an overflow condition.  */
+
−    TCT_Check_Stack();
+
−
+
−#endif
+
−
+
−#ifdef  NU_ENABLE_HISTORY
+
−
+
−    /* Make an entry that corresponds to this function in the system history
+
−       log.  */
+
−    HIC_Make_History_Entry(NU_REQUEST_DRIVER_ID, (UNSIGNED) driver,
+
−                                       (UNSIGNED) request, (UNSIGNED) 0);
+
−
+
−#endif
+
−
+
−#ifdef INCLUDE_PROVIEW
+
−    _RTProf_DumpDriver(RT_PROF_REQUEST_DRIVER, driver, RT_PROF_OK);
+
−#endif /*INCLUDE_PROVIEW*/
+
−    /* Call the specified I/O Driver.  */
+
−    (*(driver -> nu_driver_entry)) (driver, request);
+
−
+
−    /* Return to user mode */
+
−    NU_USER_MODE();
+
−
+
−    /* Return the completion status.  */
+
−    return(NU_SUCCESS);
+
−}
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      IOC_Resume_Driver                                                */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function resumes a task previously suspended inside of an   */
+
−/*      I/O driver.  Typically, this function is called from within an   */
+
−/*      I/O driver.                                                      */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*      IOCE_Resume_Driver                  Error checking shell         */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      [HIC_Make_History_Entry]            Make entry in history log    */
+
−/*      TCC_Resume_Task                     Resume a suspended task      */
+
−/*      TCT_Control_To_System               Transfer control to higher   */
+
−/*                                            priority task              */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*      TCT_Get_Current_Protect             Pickup current protection    */
+
−/*      TCT_Set_Current_Protect             Set current protection       */
+
−/*      TCT_System_Protect                  Protect against system access*/
+
−/*      TCT_System_Unprotect                Release system protection    */
+
−/*      TCT_Unprotect                       Release system protection    */
+
−/*      TCT_Unprotect_Specific              Release specific protection  */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      task                                Pointer of task to resume    */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      NU_SUCCESS                          If service is successful     */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*        DATE                    REMARKS                                */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*      03-01-1994      Changed function interfaces to                   */
+
−/*                      match prototype, changed                         */
+
−/*                      protection logic, resulting in                   */
+
−/*                      version 1.1                                      */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*      04-23-1996      Corrected SPR121                                 */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−STATUS  IOC_Resume_Driver(NU_TASK *task)
+
−{
+
−
+
−TC_PROTECT     *save_protect;               /* Saved protect pointer     */
+
−NU_SUPERV_USER_VARIABLES
+
−
+
−
+
−    /* Switch to supervisor mode */
+
−    NU_SUPERVISOR_MODE();
+
−
+
−#ifdef  NU_ENABLE_STACK_CHECK
+
−
+
−    /* Call stack checking function to check for an overflow condition.  */
+
−    TCT_Check_Stack();
+
−
+
−#endif
+
−
+
−#ifdef  NU_ENABLE_HISTORY
+
−
+
−    /* Make an entry that corresponds to this function in the system history
+
−       log.  */
+
−    HIC_Make_History_Entry(NU_RESUME_DRIVER_ID, (UNSIGNED) task,
+
−                                                (UNSIGNED) 0, (UNSIGNED) 0);
+
−
+
−#endif
+
−
+
−    /* Pickup current protection. */
+
−    save_protect =  TCT_Get_Current_Protect();
+
−
+
−    /* Protect against system access.  */
+
−    TCT_System_Protect();
+
−
+
−#ifdef INCLUDE_PROVIEW
+
−    _RTProf_DumpDriver(RT_PROF_RESUME_DRIVER, 0 , RT_PROF_OK);
+
−#endif /*INCLUDE_PROVIEW*/
+
−    /* Resume the specified task.  */
+
−    if (TCC_Resume_Task(task, NU_DRIVER_SUSPEND))
+
−    {
+
−        /* Only unprotect if there is protection in place. */
+
−        if (save_protect)
+
−        {
+
−            /* Release protection caller had.  */
+
−            TCT_Unprotect_Specific(save_protect);
+
−        }
+
−
+
−        /* Transfer control to the system if the resumed task function
+
−           detects a preemption condition.  */
+
−        TCT_Control_To_System();
+
−    }
+
−    else
+
−    {
+
−
+
−        /* Determine if there was protection previously in force.  */
+
−        if (save_protect)
+
−        {
+
−
+
−            /* Switch to original protection.  */
+
−            TCT_Set_Current_Protect(save_protect);
+
−
+
−            /* Release system protection.  */
+
−            TCT_System_Unprotect();
+
−        }
+
−        else
+
−
+
−            /* Release system protection.  */
+
−            TCT_Unprotect();
+
−    }
+
−
+
−    /* Return to user mode */
+
−    NU_USER_MODE();
+
−
+
−    /* Return the completion status.  */
+
−    return(NU_SUCCESS);
+
−}
+
−
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      IOC_Suspend_Driver                                               */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function suspends a task inside of an I/O driver.  It is    */
+
−/*      the responsibility of the I/O driver to keep track of tasks      */
+
−/*      waiting inside of an I/O driver.                                 */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*      IOCE_Suspend_Driver                 Error checking shell         */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      [HIC_Make_History_Entry]            Make entry in history log    */
+
−/*      TCC_Suspend_Task                    Suspend calling task         */
+
−/*      TCT_Current_Thread                  Current task thread          */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*      TCT_Get_Current_Protect             Pickup current protect ptr   */
+
−/*      TCT_Set_Suspend_Protect             Setup suspend protect field  */
+
−/*      TCT_System_Protect                  Protect against system access*/
+
−/*      TCT_Unprotect_Specific              Release user protection      */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      terminate_routine                   Termination/Timeout cleanup  */
+
−/*                                            routine                    */
+
−/*      information                         Information pointer of the   */
+
−/*                                            cleanup routine            */
+
−/*      timeout                             Suspension timeout request   */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      NU_SUCCESS                          If service is successful     */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*        DATE                    REMARKS                                */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*      03-01-1994      Changed protection logic,                        */
+
−/*                      resulting in version 1.1                         */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*      04-23-1996      Corrected SPR121.                                */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−STATUS  IOC_Suspend_Driver(VOID (*terminate_routine)(VOID *),
+
−                                        VOID *information, UNSIGNED timeout)
+
−{
+
−
+
−TC_PROTECT  *suspend_protect;               /* Current protection        */
+
−NU_SUPERV_USER_VARIABLES
+
−
+
−    /* Switch to supervisor mode */
+
−    NU_SUPERVISOR_MODE();
+
−
+
−#ifdef  NU_ENABLE_STACK_CHECK
+
−
+
−    /* Call stack checking function to check for an overflow condition.  */
+
−    TCT_Check_Stack();
+
−
+
−#endif
+
−
+
−#ifdef  NU_ENABLE_HISTORY
+
−
+
−    /* Make an entry that corresponds to this function in the system history
+
−       log.  */
+
−    HIC_Make_History_Entry(NU_SUSPEND_DRIVER_ID, (UNSIGNED) terminate_routine,
+
−                                (UNSIGNED) information, (UNSIGNED) timeout);
+
−
+
−#endif
+
−
+
−
+
−    /* Pickup current protect.  */
+
−    suspend_protect =  TCT_Get_Current_Protect();
+
−
+
−    /* Setup system protection.  */
+
−    TCT_System_Protect();
+
−
+
−#ifdef INCLUDE_PROVIEW
+
−    _RTProf_DumpDriver(RT_PROF_SUSPEND_DRIVER, 0 , RT_PROF_OK);
+
−#endif /*INCLUDE_PROVIEW*/
+
−    /* If no protection exists, don't unprotect. */
+
−    if (suspend_protect)
+
−    {
+
−        /* Release initial protection.  */
+
−        TCT_Unprotect_Specific(suspend_protect);
+
−
+
−        /* Save suspend protect for timeout and terminate.  */
+
−        TCT_Set_Suspend_Protect(suspend_protect);
+
−    }
+
−
+
−    /* Suspend the calling task.  */
+
−    TCC_Suspend_Task((NU_TASK *) TCT_Current_Thread(), NU_DRIVER_SUSPEND,
+
−                                terminate_routine, information, timeout);
+
−
+
−    /* Return to user mode */
+
−    NU_USER_MODE();
+
−
+
−    /* Return the completion status.  */
+
−    return(NU_SUCCESS);
+
−}
+
−
+
−
+
−
+
−
+
−