+
−/*************************************************************************/
+
−/*                                                                       */
+
−/*               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       */
+
−/*                                                                       */
+
−/*      iof.c                                          Nucleus PLUS 1.14 */
+
−/*                                                                       */
+
−/* COMPONENT                                                             */
+
−/*                                                                       */
+
−/*      IO - Input/Output Driver Management                              */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This file contains routines to obtain facts about the I/O Driver */
+
−/*      Management component.                                            */
+
−/*                                                                       */
+
−/* DATA STRUCTURES                                                       */
+
−/*                                                                       */
+
−/*      None                                                             */
+
−/*                                                                       */
+
−/* FUNCTIONS                                                             */
+
−/*                                                                       */
+
−/*      IOF_Established_Drivers             Return total number of I/O   */
+
−/*                                            drivers                    */
+
−/*      IOF_Driver_Pointers                 Return list of I/O driver    */
+
−/*                                            pointers                   */
+
−/*                                                                       */
+
−/* 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                                */
+
−/*                                                                       */
+
−/*      03-01-1994      Initial version of I/O driver                    */
+
−/*                      fact service file, version 1.1                   */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*      04-17-1996      updated to version 1.2                           */
+
−/*      03-24-1998      Released version 1.3                             */
+
−/*      03-26-1999      Released 1.11m (new release                      */
+
−/*                        numbering scheme)                              */
+
−/*      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         */
+
−
+
−/* 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                                                              */
+
−/*                                                                       */
+
−/*      IOF_Established_Drivers                                          */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function returns the current number of established I/O      */
+
−/*      drivers.  I/O drivers previously deleted are no longer           */
+
−/*      considered established.                                          */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      None                                                             */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      IOD_Total_Drivers                   Number of established I/O    */
+
−/*                                            drivers                    */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*        DATE                    REMARKS                                */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*      03-01-1994      Changed function interface,                      */
+
−/*                      resulting in version 1.1                         */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−UNSIGNED  IOF_Established_Drivers(VOID)
+
−{
+
−
+
−
+
−#ifdef  NU_ENABLE_STACK_CHECK
+
−
+
−    /* Call stack checking function to check for an overflow condition.  */
+
−    TCT_Check_Stack();
+
−
+
−#endif
+
−
+
−    /* Return the number of established I/O drivers.  */
+
−    return(IOD_Total_Drivers);
+
−}
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      IOF_Driver_Pointers                                              */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function builds a list of driver  pointers, starting at the */
+
−/*      specified location.  The number of driver  pointers placed in    */
+
−/*      the list is equivalent to the total number of drivers or the     */
+
−/*      maximum number of pointers specified in the call.                */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*      TCT_Protect                         Protect created list         */
+
−/*      TCT_Unprotect                       Release protection           */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      pointer_list                        Pointer to the list area     */
+
−/*      maximum_pointers                    Maximum number of pointers   */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      pointers                            Number of I/O driver pointers*/
+
−/*                                            placed in the list         */
+
−/*                                                                       */
+
−/* 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      Changed function interface,                      */
+
−/*                      resulting in version 1.1                         */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−UNSIGNED  IOF_Driver_Pointers(NU_DRIVER **pointer_list,
+
−                                                UNSIGNED maximum_pointers)
+
−{
+
−CS_NODE         *node_ptr;                  /* Pointer to each NU_DRIVER */
+
−UNSIGNED         pointers;                  /* Number of pointers in list*/
+
−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
+
−
+
−    /* Initialize the number of pointers returned.  */
+
−    pointers =  0;
+
−
+
−    /* Protect against access to the list of created I/O drivers.  */
+
−    TCT_Protect(&IOD_List_Protect);
+
−
+
−    /* Loop until all driver  pointers are in the list or until the maximum
+
−       list size is reached.  */
+
−    node_ptr =  IOD_Created_Drivers_List;
+
−    while ((node_ptr) && (pointers < maximum_pointers))
+
−    {
+
−
+
−        /* Place the node into the destination list.  */
+
−        *pointer_list++ =  (NU_DRIVER *) node_ptr;
+
−
+
−        /* Increment the pointers variable.  */
+
−        pointers++;
+
−
+
−        /* Position the node pointer to the next node.  */
+
−        node_ptr =  node_ptr -> cs_next;
+
−
+
−        /* Determine if the pointer is at the head of the list.  */
+
−        if (node_ptr == IOD_Created_Drivers_List)
+
−
+
−            /* The list search is complete.  */
+
−            node_ptr =  NU_NULL;
+
−    }
+
−
+
−    /* Release protection against access to the list of created drivers.  */
+
−    TCT_Unprotect();
+
−
+
−    /* Return to user mode */
+
−    NU_USER_MODE();
+
−
+
−    /* Return the number of pointers in the list.  */
+
−    return(pointers);
+
−}
+
−
+
−
+
−
+
−
+
−
+
−