view src/g23m-gprs/sndcp/sndcp_pdas.c @ 268:f2e52cab0a73

abb_inth.c: check all interrupt causes, not just one The original code used if - else if - else if etc constructs, thus the first detected interrupt was the only one handled. However, Iota ITSTATREG is a clear-on-read register, thus if we only handle the first detected interrupt and skip checking the others, then the other interrupts will be lost, if more than one interrupt happened to occur in one ABB interrupt handling cycle - a form of rare race condition. Change the code to check all interrupts that were read in this cycle.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 13 Jun 2021 18:17:53 +0000
parents fa8dc04885d8
children
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/* 
+----------------------------------------------------------------------------- 
|  Project :  GPRS (8441)
|  Modul   :  sndcp_pdas.c
+----------------------------------------------------------------------------- 
|  Copyright 2002 Texas Instruments Berlin, AG 
|                 All rights reserved. 
| 
|                 This file is confidential and a trade secret of Texas 
|                 Instruments Berlin, AG 
|                 The receipt of or possession of this file does not convey 
|                 any rights to reproduce or disclose its contents or to 
|                 manufacture, use, or sell anything it may describe, in 
|                 whole, or in part, without the specific written consent of 
|                 Texas Instruments Berlin, AG. 
+----------------------------------------------------------------------------- 
|  Purpose :  This modul is part of the entity SNDCP and implements all 
|             functions to handles the incoming process internal signals as  
|             described in the SDL-documentation (PDA-statemachine)
+----------------------------------------------------------------------------- 
*/ 

#define ENTITY_SNDCP

/*==== INCLUDES =============================================================*/

#include "typedefs.h"    /* to get Condat data types */
#include "vsi.h"        /* to get a lot of macros */
#include "macdef.h"
#include "gsm.h"        /* to get a lot of macros */
#include "prim.h"       /* to get the definitions of used SAP and directions */

#include "dti.h"
#include "sndcp.h"        /* to get the global entity definitions */
#include "sndcp_f.h"       /* to get the functions to access the global arrays*/

/*==== CONST ================================================================*/

/*==== LOCAL VARS ===========================================================*/

/*==== PRIVATE FUNCTIONS ====================================================*/

/*==== PUBLIC FUNCTIONS =====================================================*/



/*
+------------------------------------------------------------------------------
| Function    : sig_sda_pda_getdata_req
+------------------------------------------------------------------------------
| Description : Handles the internal signal SIG_SDA_PDA_GETDATA_REQ
|
| Parameters  : the affected sapi.
|
+------------------------------------------------------------------------------
*/
GLOBAL void sig_sda_pda_getdata_req (UBYTE sapi) 
{ 
  UBYTE sapi_index = 0;

  TRACE_ISIG( "sig_sda_pda_getdata_req" );

   /*
    * set service instance according to sapi in primitive
    */
  sndcp_get_sapi_index(sapi, &sapi_index);
  sndcp_data->pda = & sndcp_data->pda_base[sapi_index];
 
  switch( GET_STATE( PDA ) )
  {
    case PDA_DEFAULT:
#ifdef SNDCP_TRACE_ALL
      TRACE_EVENT("trying to palloc/send LL_GETDATA_REQ");
#endif
      {
        PALLOC(ll_getdata_req, LL_GETDATA_REQ);

        ll_getdata_req->sapi = sapi;
        /*
         * TLLI is not evaluated by LLC.
         */
        PSEND(hCommLLC, ll_getdata_req);
      }
      break;
    default:
      TRACE_ERROR( "SIG_SDA_PDA_GETDATA_REQ unexpected" );
      break;
  }
} /* sig_sda_pda_getdata_req() */