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/**
* @file
*
* @brief Unregister a Driver from the Device Driver Table.
*
* @ingroup ClassicIO
*/
/*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/ioimpl.h>
#include <rtems/rtems/intr.h>
#include <string.h>
rtems_status_code rtems_io_unregister_driver(
rtems_device_major_number major
)
{
if ( rtems_interrupt_is_in_progress() )
return RTEMS_CALLED_FROM_ISR;
if ( major < _IO_Number_of_drivers ) {
ISR_lock_Context lock_context;
_IO_Driver_registration_acquire( &lock_context );
memset(
&_IO_Driver_address_table[major],
0,
sizeof( rtems_driver_address_table )
);
_IO_Driver_registration_release( &lock_context );
return RTEMS_SUCCESSFUL;
}
return RTEMS_UNSATISFIED;
}
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