evce.c

nuclues 内核源代码已经在arm7-9 上作了移植

/*************************************************************************/
/*                                                                       */
/*        Copyright (c) 1993-2001 Accelerated Technology, Inc.           */
/*                                                                       */
/* PROPRIETARY RIGHTS of Accelerated Technology are involved in the      */
/* subject matter of this material.  All manufacturing, reproduction,    */
/* use, and sales rights pertaining to this subject matter are governed  */
/* by the license agreement.  The recipient of this software implicitly  */
/* accepts the terms of the license.                                     */
/*                                                                       */
/*************************************************************************/

/*************************************************************************/
/*                                                                       */
/* FILE NAME                                            VERSION          */
/*                                                                       */
/*      evce.c                                          PLUS  1.13       */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      EV - Event Group Management                                      */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains the error checking routines for the functions */
/*      in the Event Group component.  This permits easy removal of      */
/*      error checking logic when it is not needed.                      */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Accelerated Technology, Inc.                                     */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* FUNCTIONS                                                             */
/*                                                                       */
/*      EVCE_Create_Event_Group             Create an event group        */
/*      EVCE_Delete_Event_Group             Delete an event group        */
/*      EVCE_Set_Events                     Set events in a group        */
/*      EVCE_Retrieve_Events                Retrieve events from a group */
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*      cs_extr.h                           Common Service functions     */
/*      tc_extr.h                           Thread Control functions     */
/*      ev_extr.h                           Event Group functions        */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*         NAME            DATE                    REMARKS               */
/*                                                                       */
/*      03-01-1993      Created initial version 1.0                      */
/*      04-19-1993      Verified version 1.0                             */
/*      03-01-1994      Changed name original error                      */
/*                      checking file and changed                        */
/*                      function interfaces, resulting                   */
/*                      in 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                             */
/*                                                                       */
/*************************************************************************/
#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     */



/*************************************************************************/
/*                                                                       */
/* FUNCTION                                                              */
/*                                                                       */
/*      EVCE_Create_Event_Group                                          */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This function performs error checking on the parameters supplied */
/*      to the create event group function.                              */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Accelerated Technology, Inc.                                     */
/*                                                                       */
/* CALLED BY                                                             */
/*                                                                       */
/*      Application                                                      */
/*                                                                       */
/* CALLS                                                                 */
/*                                                                       */
/*      EVC_Create_Event_Group              Actual create event group    */
/*                                            function                   */
/*                                                                       */
/* INPUTS                                                                */
/*                                                                       */
/*      event_group_ptr                     Event Group control block ptr*/
/*      name                                Event Group name             */
/*                                                                       */
/* OUTPUTS                                                               */
/*                                                                       */
/*      NU_INVALID_GROUP                    Event group control block    */
/*                                            pointer is NULL            */
/*                                                                       */
/* 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                             */
/*                                                                       */
/*************************************************************************/
STATUS  EVCE_Create_Event_Group(NU_EVENT_GROUP *event_group_ptr, CHAR *name)
{

EV_GCB         *event_group;                /* Event control block ptr   */
STATUS          status;                     /* Completion status         */


    /* Move input event group pointer into internal pointer.  */
    event_group =  (EV_GCB *) event_group_ptr;

    /* Check for a NULL event group pointer or an already created event 
       group.  */
    if ((event_group == NU_NULL) || (event_group -> ev_id == EV_EVENT_ID))
    
        /* Invalid event group control block pointer.  */
        status =  NU_INVALID_GROUP;
        
    else
    
        /* Call the actual service to create the event group.  */
        status =  EVC_Create_Event_Group(event_group_ptr, name);
        
    /* Return completion status.  */
    return(status);
}


/*************************************************************************/
/*                                                                       */
/* FUNCTION                                                              */
/*                                                                       */
/*      EVCE_Delete_Event_Group                                          */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This function performs error checking on the parameters supplied */
/*      to the delete event group function.                              */
/*                                                                       */
/* AUTHOR                                                                */
/*                                                                       */
/*      Accelerated Technology, Inc.                                     */
/*                                                                       */
/* CALLED BY                                                             */
/*                                                                       */
/*      Application                                                      */
/*                                                                       */
/* CALLS                                                                 */
/*                                                                       */
/*      EVC_Delete_Event_Group              Actual delete event group    */
/*                                            function                   */
/*                                                                       */
/* INPUTS                                                                */
/*                                                                       */
/*      event_group_ptr                     Event Group control block ptr*/
/*                                                                       */
/* OUTPUTS                                                               */
/*                                                                       */
/*      NU_INVALID_GROUP                    Event group control block    */
/*                                            pointer is invalid         */
/*                                                                       */
/* 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                             */
/*                                                                       */
/*************************************************************************/
STATUS  EVCE_Delete_Event_Group(NU_EVENT_GROUP *event_group_ptr)
{

EV_GCB         *event_group;                /* Event control block ptr   */
STATUS          status;                     /* Completion status         */


    /* Move input event group pointer into internal pointer.  */
    event_group =  (EV_GCB *) event_group_ptr;

    /* Determine if the event group pointer is valid.  */
    if ((event_group) && (event_group -> ev_id == EV_EVENT_ID))