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/*
* This file contains the support infrastructure used to manage the
* table of integer style file descriptors used by the low level
* POSIX system calls like open(), read, fstat(), etc.
*
* COPYRIGHT (c) 1989-1999.
* 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.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/libio_.h> /* libio_.h pulls in rtems */
#include <rtems.h>
#include <rtems/assoc.h> /* assoc.h not included by rtems.h */
#include <stdio.h> /* O_RDONLY, et.al. */
#include <fcntl.h> /* O_RDONLY, et.al. */
#include <assert.h>
#include <errno.h>
#include <errno.h>
#include <string.h> /* strcmp */
#include <unistd.h>
#include <stdlib.h> /* calloc() */
#include <rtems/libio.h> /* libio.h not pulled in by rtems */
/*
* File descriptor Table Information
*/
extern uint32_t rtems_libio_number_iops;
rtems_id rtems_libio_semaphore;
rtems_libio_t *rtems_libio_iops;
rtems_libio_t *rtems_libio_iop_freelist;
/*
* rtems_libio_init
*
* Called by BSP startup code to initialize the libio subsystem.
*/
void rtems_libio_init( void )
{
rtems_status_code rc;
int i;
rtems_libio_t *iop;
if (rtems_libio_number_iops > 0)
{
rtems_libio_iops = (rtems_libio_t *) calloc(rtems_libio_number_iops,
sizeof(rtems_libio_t));
if (rtems_libio_iops == NULL)
rtems_fatal_error_occurred(RTEMS_NO_MEMORY);
iop = rtems_libio_iop_freelist = rtems_libio_iops;
for (i = 0 ; i < (rtems_libio_number_iops - 1) ; i++, iop++)
iop->data1 = iop + 1;
iop->data1 = NULL;
}
/*
* Create the binary semaphore used to provide mutual exclusion
* on the IOP Table.
*/
rc = rtems_semaphore_create(
RTEMS_LIBIO_SEM,
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
RTEMS_NO_PRIORITY,
&rtems_libio_semaphore
);
if ( rc != RTEMS_SUCCESSFUL )
rtems_fatal_error_occurred( rc );
/*
* Initialize the base file system infrastructure.
*/
if (rtems_fs_init_helper)
(* rtems_fs_init_helper)();
}
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