+
−/*************************************************************************/
+
−/*                                                                       */
+
−/*               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       */
+
−/*                                                                       */
+
−/*      evf.c                                          Nucleus PLUS 1.14 */
+
−/*                                                                       */
+
−/* COMPONENT                                                             */
+
−/*                                                                       */
+
−/*      EV - Event Group Management                                      */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This file contains routines to obtain facts about the Event      */
+
−/*      Group Management component.                                      */
+
−/*                                                                       */
+
−/* DATA STRUCTURES                                                       */
+
−/*                                                                       */
+
−/*      None                                                             */
+
−/*                                                                       */
+
−/* FUNCTIONS                                                             */
+
−/*                                                                       */
+
−/*      EVF_Established_Event_Groups        Number of created groups     */
+
−/*      EVF_Event_Group_Pointers            Build event group pointer    */
+
−/*                                            list                       */
+
−/*      EVF_Event_Group_Information         Retrieve event group info    */
+
−/*                                                                       */
+
−/* DEPENDENCIES                                                          */
+
−/*                                                                       */
+
−/*      cs_extr.h                           Common Service functions     */
+
−/*      tc_extr.h                           Thread Control functions     */
+
−/*      ev_extr.h                           Event Group functions        */
+
−/*      hi_extr.h                           History functions            */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*         DATE                    REMARKS                               */
+
−/*                                                                       */
+
−/*      03-01-1994      Initial version of event fact                    */
+
−/*                      service file, version 1.1                        */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*      04-17-1996      updated to version 1.2                           */
+
−/*      11-18-1996      Protected Informational service                  */
+
−/*                      from NULL Control Block pointers                 */
+
−/*                      creating 1.2a. (SPR220)                          */
+
−/*      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        "ev_extr.h"                 /* Event Group functions     */
+
−#include        "hi_extr.h"                 /* History functions         */
+
−
+
−
+
−/* Define external inner-component global data references.  */
+
−
+
−extern CS_NODE         *EVD_Created_Event_Groups_List;
+
−extern UNSIGNED         EVD_Total_Event_Groups;
+
−extern TC_PROTECT       EVD_List_Protect;
+
−
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      EVF_Established_Event_Groups                                     */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function returns the current number of established          */
+
−/*      event groups.  Event groups previously deleted are no longer     */
+
−/*      considered established.                                          */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      None                                                             */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      EVD_Total_Event_Groups              Number of established        */
+
−/*                                            event groups               */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*         DATE                    REMARKS                               */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*      03-01-1994      Modified function interface,                     */
+
−/*                      resulting in version 1.1                         */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−UNSIGNED  EVF_Established_Event_Groups(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 event groups.  */
+
−    return(EVD_Total_Event_Groups);
+
−}
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      EVF_Event_Group_Pointers                                         */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function builds a list of event group pointers, starting at */
+
−/*      the specified location.  The number of event group pointers      */
+
−/*      placed in the list is equivalent to the total number of          */
+
−/*      event groups 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 event groups 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      Modified function interface,                     */
+
−/*                      resulting in version 1.1                         */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−UNSIGNED  EVF_Event_Group_Pointers(NU_EVENT_GROUP **pointer_list,
+
−                                                UNSIGNED maximum_pointers)
+
−{
+
−CS_NODE         *node_ptr;                  /* Pointer to each GCB       */
+
−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 event groups.  */
+
−    TCT_Protect(&EVD_List_Protect);
+
−
+
−    /* Loop until all event group pointers are in the list or until
+
−       the maximum list size is reached.  */
+
−    node_ptr =  EVD_Created_Event_Groups_List;
+
−    while ((node_ptr) && (pointers < maximum_pointers))
+
−    {
+
−
+
−        /* Place the node into the destination list.  */
+
−        *pointer_list++ =  (NU_EVENT_GROUP *) 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 == EVD_Created_Event_Groups_List)
+
−
+
−            /* The list search is complete.  */
+
−            node_ptr =  NU_NULL;
+
−    }
+
−
+
−    /* Release protection against access to the list of created
+
−       event groups. */
+
−    TCT_Unprotect();
+
−
+
−    /* Return to user mode */
+
−    NU_USER_MODE();
+
−
+
−    /* Return the number of pointers in the list.  */
+
−    return(pointers);
+
−}
+
−
+
−
+
−/*************************************************************************/
+
−/*                                                                       */
+
−/* FUNCTION                                                              */
+
−/*                                                                       */
+
−/*      EVF_Event_Group_Information                                      */
+
−/*                                                                       */
+
−/* DESCRIPTION                                                           */
+
−/*                                                                       */
+
−/*      This function returns information about the specified event      */
+
−/*      group. However, if the supplied event group pointer is invalid,  */
+
−/*      the function simply returns an error status.                     */
+
−/*                                                                       */
+
−/* CALLED BY                                                             */
+
−/*                                                                       */
+
−/*      Application                                                      */
+
−/*                                                                       */
+
−/* CALLS                                                                 */
+
−/*                                                                       */
+
−/*      [TCT_Check_Stack]                   Stack checking function      */
+
−/*      TCT_System_Protect                  Protect event group          */
+
−/*      TCT_Unprotect                       Release protection           */
+
−/*                                                                       */
+
−/* INPUTS                                                                */
+
−/*                                                                       */
+
−/*      event_group_ptr                     Pointer to the event group   */
+
−/*      name                                Destination for the name     */
+
−/*      event_flags                         Pointer to a variable to hold*/
+
−/*                                            the current event flags    */
+
−/*      tasks_waiting                       Destination for the tasks    */
+
−/*                                            waiting count              */
+
−/*      first_task                          Destination for the pointer  */
+
−/*                                            to the first task waiting  */
+
−/*                                                                       */
+
−/* OUTPUTS                                                               */
+
−/*                                                                       */
+
−/*      NU_SUCCESS                          If a valid event group       */
+
−/*                                            pointer is supplied        */
+
−/*      NU_INVALID_GROUP                    If event group pointer is    */
+
−/*                                            not valid                  */
+
−/*                                                                       */
+
−/* HISTORY                                                               */
+
−/*                                                                       */
+
−/*         DATE                    REMARKS                               */
+
−/*                                                                       */
+
−/*      03-01-1993      Created initial version 1.0                      */
+
−/*      04-19-1993      Verified version 1.0                             */
+
−/*      03-01-1994      Modified function interface,                     */
+
−/*                      resulting in version 1.1                         */
+
−/*                                                                       */
+
−/*      03-18-1994      Verified version 1.1                             */
+
−/*      11-18-1996      Corrected SPR220.                                */
+
−/*                                                                       */
+
−/*************************************************************************/
+
−STATUS EVF_Event_Group_Information(NU_EVENT_GROUP *event_group_ptr, CHAR *name,
+
−        UNSIGNED *event_flags, UNSIGNED *tasks_waiting, NU_TASK **first_task)
+
−{
+
−
+
−EV_GCB         *event_group;                /* Event control block ptr   */
+
−INT             i;                          /* Working integer variable  */
+
−STATUS          completion;                 /* Completion status         */
+
−NU_SUPERV_USER_VARIABLES
+
−
+
−    /* Switch to supervisor mode */
+
−    NU_SUPERVISOR_MODE();
+
−
+
−    /* Move input event group pointer into internal pointer.  */
+
−    event_group =  (EV_GCB *) event_group_ptr;
+
−
+
−
+
−#ifdef  NU_ENABLE_STACK_CHECK
+
−
+
−    /* Call stack checking function to check for an overflow condition.  */
+
−    TCT_Check_Stack();
+
−
+
−#endif
+
−
+
−    /* Determine if this event_group id is valid.  */
+
−    if ((event_group != NU_NULL) && (event_group -> ev_id == EV_EVENT_ID))
+
−    {
+
−
+
−        /* Setup protection of the event_group.  */
+
−        TCT_System_Protect();
+
−
+
−        /* The event_group pointer is valid.  Reflect this in the completion
+
−           status and fill in the actual information.  */
+
−        completion =  NU_SUCCESS;
+
−
+
−        /* Copy the event_group's name.  */
+
−        for (i = 0; i < NU_MAX_NAME; i++)
+
−            *name++ =  event_group -> ev_name[i];
+
−
+
−        /* Return the current event flags.  */
+
−        *event_flags =  event_group -> ev_current_events;
+
−
+
−        /* Retrieve the number of tasks waiting and the pointer to the
+
−           first task waiting.  */
+
−        *tasks_waiting =  event_group -> ev_tasks_waiting;
+
−        if (event_group -> ev_suspension_list)
+
−
+
−            /* There is a task waiting.  */
+
−            *first_task =  (NU_TASK *)
+
−                (event_group -> ev_suspension_list) -> ev_suspended_task;
+
−        else
+
−
+
−            /* There are no tasks waiting.  */
+
−            *first_task =  NU_NULL;
+
−
+
−        /* Release protection of the event group.  */
+
−        TCT_Unprotect();
+
−    }
+
−    else
+
−
+
−        /* Indicate that the event group pointer is invalid.   */
+
−        completion =  NU_INVALID_GROUP;
+
−
+
−    /* Return to user mode */
+
−    NU_USER_MODE();
+
−
+
−    /* Return the appropriate completion status.  */
+
−    return(completion);
+
−}
+
−
+
−
+
−
+
−