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What is _mem_set_type() ?

Question asked by alexandrevincon on Mar 29, 2013
Latest reply on Apr 1, 2013 by alexandrevincon

Hello,

 

I am currently using MQX 4.0 and trying to write my own I/O driver, base on TFS source code. I stumbled on this code in tfs.c :

 

/*FUNCTION*-------------------------------------------------------------------

*

* Function Name    : _io_tfs_install

* Returned Value   : TFS error code.

* Comments         : Initialize the Trivial File System.

*

*END*---------------------------------------------------------------------*/

 

uint_32 _io_tfs_install

   (

      /*[IN] the name that should be given to tfs (ex: "C:", "TFS1:", etc..) */

      char_ptr              identifier,

     

      /*[IN] pointer to the first entry of the root TFS directory  */ 

      const TFS_DIR_ENTRY   *root

   )

{ /* Body */

   uint_32                      error_code;

   TFS_DRIVE_STRUCT_PTR         drive_ptr;

  

   drive_ptr = _mem_alloc_system_zero( sizeof(TFS_DRIVE_STRUCT) );

   if ( drive_ptr == NULL ) {

      return( TFS_INSUFFICIENT_MEMORY );

   }/* Endif */

   _mem_set_type(drive_ptr,MEM_TYPE_IO_TFS_DRIVE_STRUCT);     

  

   _int_disable();

 

   error_code = _io_dev_install_ext( identifier,

      _io_tfs_open,                    

      _io_tfs_close,

      _io_tfs_read,                     

      _io_tfs_write,                    

      _io_tfs_ioctl,

      _io_tfs_uninstall,

      (pointer)drive_ptr);

 

   if (error_code != IO_OK) {

      _mem_free(drive_ptr);

      drive_ptr = NULL;

      _int_enable();     

      return error_code;

   } /* Endif */

 

   drive_ptr->IDENTIFIER = identifier;

   drive_ptr->ROOT     = root;

 

   _int_enable();

 

   return(error_code);

 

} /* Endbody */


 

I understand all of it except the call to _mem_set_type(). This function does not seem to be documented, so I don't know what it does and how I can adapt it for my own I/O driver.

 

It would be great if someone could give me a clue !

 

Best regards,

AV

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