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view src/gpf/frame/vsi_sem.c @ 268:f2e52cab0a73

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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 4e78acac3d88
children
line wrap: on
line source

/* 
+------------------------------------------------------------------------------
|  File:       vsi_sem.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 Module defines the virtual system interface part
|             for the semaphore handling.
+----------------------------------------------------------------------------- 
*/ 

#ifndef __VSI_SEM_C__
#define __VSI_SEM_C__
#endif

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

#include "typedefs.h"
#include "vsi.h"
#include "os.h"
#include "frm_defs.h"
#include "frm_types.h"
#include "frm_glob.h"

/*==== TYPES ======================================================*/


/*==== CONSTANTS ==================================================*/


/*==== EXTERNALS ==================================================*/
/* -------------- S H A R E D - BEGIN ---------------- */
#ifdef _TOOLS_
#pragma data_seg("FRAME_SHARED")
#endif

/*==== VARIABLES ==================================================*/


#ifdef _TOOLS_
#pragma data_seg()
#endif
/* -------------- S H A R E D - END ---------------- */

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


#ifndef RUN_INT_RAM
/*
+--------------------------------------------------------------------+
| PROJECT : GSM-Frame (8415)           MODULE  : VSI_SEM             |
| STATE   : code                       ROUTINE : vsi_s_open          |
+--------------------------------------------------------------------+

  PURPOSE : opens a semaphore, creates if not exist

*/

T_HANDLE vsi_s_open (T_HANDLE Caller, char *Name, USHORT Count)
{
OS_HANDLE SemHandle;

  /*
   * if semaphore already exists, return handle
   */
  if ( os_OpenSemaphore ( Caller, Name, &SemHandle ) != OS_ERROR )
    return SemHandle;

  /*
   * if semaphore not exists, create
   */
  if ( os_CreateSemaphore ( Caller, Name, Count, &SemHandle, pf_TaskTable[Caller].MemPoolHandle ) != OS_ERROR )
    return SemHandle;
  else
    vsi_o_assert( Caller, OS_SYST_ERR_MAX_SEMA, __FILE__, __LINE__,
                  "Number of created semaphores > MAX_SEMAPHORES" );

  /*
   * if semaphore cannot be created, return VSI_ERROR
   */
  return VSI_ERROR;
}
#endif

#ifndef RUN_INT_RAM
/*
+--------------------------------------------------------------------+
| PROJECT : GSM-Frame (8415)           MODULE  : VSI_SEM             |
| STATE   : code                       ROUTINE : vsi_s_close          |
+--------------------------------------------------------------------+

  PURPOSE : closes a semaphore

*/

int vsi_s_close (T_HANDLE Caller, T_HANDLE SemHandle)
{

  if ( os_CloseSemaphore ( Caller, SemHandle ) != OS_ERROR )
    return VSI_OK;

  return VSI_ERROR;
}
#endif

#ifndef RUN_FLASH
/*
+--------------------------------------------------------------------+
| PROJECT : GSM-Frame (8415)           MODULE  : VSI_SEM             |
| STATE   : code                       ROUTINE : vsi_s_get           |
+--------------------------------------------------------------------+

  PURPOSE : obtains a semaphore

*/

int vsi_s_get (T_HANDLE Caller, T_HANDLE SemHandle)
{
LONG Status;

  Status = os_ObtainSemaphore ( Caller, SemHandle, OS_SUSPEND );
  if ( Status == OS_OK || Status == OS_WAITED )
    return VSI_OK;

  return VSI_ERROR;
}
#endif

#ifndef RUN_FLASH
/*
+--------------------------------------------------------------------+
| PROJECT : GSM-Frame (8415)           MODULE  : VSI_SEM             |
| STATE   : code                       ROUTINE : vsi_s_release       |
+--------------------------------------------------------------------+

  PURPOSE : releases a semaphore

*/

int vsi_s_release (T_HANDLE Caller, T_HANDLE SemHandle)
{

  if ( os_ReleaseSemaphore ( Caller, SemHandle ) != OS_ERROR )
    return VSI_OK;

  return VSI_ERROR;
}
#endif

#ifndef RUN_INT_RAM
/*
+--------------------------------------------------------------------+
| PROJECT : GSM-Frame (8415)           MODULE  : VSI_SEM             |
| STATE   : code                       ROUTINE : vsi_s_status        |
+--------------------------------------------------------------------+

  PURPOSE : request the current count of a semaphore

*/

int vsi_s_status (T_HANDLE Caller, T_HANDLE SemHandle, USHORT *Count )
{

  if ( os_QuerySemaphore ( Caller, SemHandle, Count ) != OS_ERROR )
    return VSI_OK;

  return VSI_ERROR;
}
#endif