fs84lowlayer.c

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#ifdef FSS_FTR

#define ACCESS_RIGHTS_INTERNAL_FS
#define FS84LOWLAYER_C

#include "Fs.h"

#undef  FILE_NUMBER
#define FILE_NUMBER 84 


/****************************************************************************************/
/*											*/
/*      The function contained in this file is used by all layers to call a function	*/
/*				in a lower layer					*/
/*											*/
/****************************************************************************************/


/* Variable reservation */
/*----------------------*/


 /* Base structure of low layer management */
t_LowLayerDataBaseStruct s_LowLayerDataBaseStruct;



/* LOCAL DEBUG MACROS */
/*--------------------*/

/* This macro verify if a function is implemented for the volume */ 
#ifdef DEBUG
#define FS_TEST_FCT_EXIST( pp_FctLevel ) \
 		if ( pp_FctLevel->p_Fct == FS_FCT_NOT_EXIST ) MC_SYS_ERROR(FS_NO_LOW_LAYER_FCT)
#else
#define FS_TEST_FCT_EXIST(pp_FctCtx)
#endif


/* This macro is to use at return from a lower layer call to verify if
	all MUTEXes would released */
#ifdef DEBUG
#define FS_TEST_ALL_MUTEX_LEVEL_FREE(pp_LayerComm) \
		if ( pp_LayerComm->a_Layer[pp_LayerComm->v_CurrentLayerLevel].v_NbrMutexLayer != 0 \
			MC_SYS_ERROR(FS_MUTEX_NOT_FREED);
#else
#define FS_TEST_ALL_MUTEX_LEVEL_FREE(pp_LayerComm)
#endif






/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_01LLInitLowLayer	     	 	              */
/* Object :    Initialize low layer management volume			      */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	t_FsConfiguration * pp_Config: Pointer on FS init structure 	      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*		none							      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*		Initializes the low layer module		 	      */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/

#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 1

void Fs84_01LLInitLowLayer( t_FsConfiguration * pp_Config )
{
    s_LowLayerDataBaseStruct.v_NbrMaxLevelLayers = pp_Config->v_NbrMaxLevelLayers;
    s_LowLayerDataBaseStruct.v_NbrKernelTasks = pp_Config->v_NbrKernelTasks;

    s_LowLayerDataBaseStruct.p_TabLayerCommunication = (t_LayerCommunication ** )
		MC_FS_GET_MEMORY( sizeof(t_LayerCommunication * ) * pp_Config-> v_NbrKernelTasks );
	
}

/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_02LLThreadComInit	     	 	              */
/* Object :    Initialize thread communication structure with lower layers    */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	t_LayerCommunication * pp_LayerCom: Communication structure pointer   */
/*	u8 	vp_TypeOfThread: Type of thread ( internal/external/task )    */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*		none							      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*	Initializes the communication structure of the thread 	 	      */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 2

void Fs84_02LLThreadComInit( t_LayerCommunication * pp_LayerCom, u8 vp_TypeOfThread )
{

   /* Clear list of mutexes */
   /* pp_LayerCom->p_MutexList = 0;  */

   /* communication stack is empty */
   pp_LayerCom->v_NbrStackEntries = 0;

   /* Updates type of thread */
   /* pp_LayerCom->v_TypeOfThread = vp_TypeOfThread; */

#ifdef DEBUG
   /* pp_LayerCom->v_NbrMutexLayer = 0; */
#endif

   /* Init pointer on interlayer comunication to nul ( no volume selected ) */
   pp_LayerCom->p_CurrentInterLayer = 0;	

   /* Place layer structure in layer communication table indexed by task ID */
   s_LowLayerDataBaseStruct.p_TabLayerCommunication[MC_RTK_CURRENT_TASK] = pp_LayerCom;	

}



/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_03GetLayerContext	     	 	              */
/* Object :    Return the context of the layer 			              */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	none								      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*	void * : Pointer of context					      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*	Returns the context of the current layer for the treated volume       */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 3

void * Fs84_03GetLayerContext ( void )
{
   t_LayerCommunication * pl_LayerCom;

   /* Load layer communication structure pointer */
   pl_LayerCom = s_LowLayerDataBaseStruct.p_TabLayerCommunication[MC_RTK_CURRENT_TASK];

   /* Return context of layer */
   return ( pl_LayerCom->p_CurrentInterLayer->p_LayerContext );   
}

/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_04LLSetNewVolume	     	 	              */
/* Object :    Set a new volume for communication structure with lower layers */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	t_fsVolStruct * pp_Vol: Pointer on volume structure		      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*		none							      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/* 	Sets the interlayer communication structure on the new volume 	      */
/*	  for this updates the pointer on the layer's structure on the	      */
/*	  structure of the highest level ( FS ) of the interlayer table	      */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/

/* To use by the FS layer to set a new volume , updates the pointer 
	on the current layer to the highest of the volume */ 
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 4


void Fs84_04LLSetNewVolume(t_fsVolStruct * pp_Vol)
{
  t_LayerCommunication * pl_LayerCom;

   /* Load layer communication structure pointer */
   pl_LayerCom = s_LowLayerDataBaseStruct.p_TabLayerCommunication[MC_RTK_CURRENT_TASK];

   /* Update current interlayer in communication structure */
   pl_LayerCom->p_CurrentInterLayer = (( t_InterLayer* )(pp_Vol->p_LayerCommunication)) 
			+ ( (( t_InterLayer* )(pp_Vol->p_LayerCommunication))->v_NbrLayers - 1 );
}




/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_05GetCommunicationStructPtr()	      	              */
/* Object :    Gets the communication structure pointer			     */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	none								      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*	t_LayerCommunication *: pointer on the communication structure 	      */
/*				of the thread				      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/* 	Gets the  pointer on the communication structure of the thread	      */
/*	( This function is only to use from the FS internal thread switch     */
/*	  because at internal thread switch the pointer must be saved before  */
/*			to run the switch )				      */
/*									      */