forked from Imagelibrary/rtems
a4097fdb2f
Semaphores of type RTEMS_SIMPLE_BINARY_SEMAPHORE are not suitable for a mutex. Use RTEMS_BINARY_SEMAPHORE with RTEMS_INHERIT_PRIORITY instead.
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
/*
|
|
* COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org>
|
|
*
|
|
* 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.
|
|
*
|
|
* $Id$
|
|
*/
|
|
/**
|
|
* @file
|
|
*
|
|
* @ingroup rtems-rfs
|
|
*
|
|
* RTEMS File System Mutex.
|
|
*/
|
|
|
|
#if HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <rtems/rfs/rtems-rfs-mutex.h>
|
|
|
|
#if __rtems__
|
|
/**
|
|
* RTEMS_RFS Mutex Attributes
|
|
*/
|
|
#define RTEMS_RFS_MUTEX_ATTRIBS \
|
|
(RTEMS_PRIORITY | RTEMS_BINARY_SEMAPHORE | \
|
|
RTEMS_INHERIT_PRIORITY | RTEMS_NO_PRIORITY_CEILING | RTEMS_LOCAL)
|
|
#endif
|
|
|
|
int
|
|
rtems_rfs_mutex_create (rtems_rfs_mutex* mutex)
|
|
{
|
|
#if __rtems__
|
|
rtems_status_code sc;
|
|
sc = rtems_semaphore_create (rtems_build_name ('R', 'F', 'S', 'm'),
|
|
1, RTEMS_RFS_MUTEX_ATTRIBS, 0,
|
|
mutex);
|
|
if (sc != RTEMS_SUCCESSFUL)
|
|
{
|
|
if (rtems_rfs_trace (RTEMS_RFS_TRACE_MUTEX))
|
|
printf ("rtems-rfs: mutex: open failed: %s\n",
|
|
rtems_status_text (sc));
|
|
return EIO;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
rtems_rfs_mutex_destroy (rtems_rfs_mutex* mutex)
|
|
{
|
|
#if __rtems__
|
|
rtems_status_code sc;
|
|
sc = rtems_semaphore_delete (*mutex);
|
|
if (sc != RTEMS_SUCCESSFUL)
|
|
{
|
|
if (rtems_rfs_trace (RTEMS_RFS_TRACE_MUTEX))
|
|
printf ("rtems-rfs: mutex: close failed: %s\n",
|
|
rtems_status_text (sc));
|
|
return EIO;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|