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/*
* YAFFS port to RTEMS
*
* Copyright (c) 2011 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* As a special exception, linking other files with the object code from
* this one to produce an executable application does not by itself cause
* the resulting executable application to be covered by the GNU General
* Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU Public License. In particular,
* the other YAFFS files are not covered by this exception, and using them
* in a proprietary application requires a paid license from Aleph One.
*/
#include "rtems_yaffs.h"
#include <assert.h>
#include <errno.h>
static void rtems_yaffs_default_lock(struct yaffs_dev *dev, void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_yaffs_default_os_context *os_context = arg;
sc = rtems_semaphore_obtain(
os_context->semaphore_id,
RTEMS_WAIT,
RTEMS_NO_TIMEOUT
);
assert(sc == RTEMS_SUCCESSFUL);
}
static void rtems_yaffs_default_unlock(struct yaffs_dev *dev, void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_yaffs_default_os_context *os_context = arg;
sc = rtems_semaphore_release(os_context->semaphore_id);
assert(sc == RTEMS_SUCCESSFUL);
}
static void rtems_yaffs_default_unmount(struct yaffs_dev *dev, void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_yaffs_default_os_context *os_context = arg;
sc = rtems_semaphore_delete(os_context->semaphore_id);
assert(sc == RTEMS_SUCCESSFUL);
}
int rtems_yaffs_initialize_default_os_context(
rtems_yaffs_default_os_context *os_context
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
os_context->os_context.lock = rtems_yaffs_default_lock;
os_context->os_context.unlock = rtems_yaffs_default_unlock;
os_context->os_context.unmount = rtems_yaffs_default_unmount;
sc = rtems_semaphore_create(
rtems_build_name('Y', 'A', 'F', 'S'),
1,
RTEMS_LOCAL
| RTEMS_BINARY_SEMAPHORE
| RTEMS_INHERIT_PRIORITY
| RTEMS_PRIORITY,
0,
&os_context->semaphore_id
);
if (sc == RTEMS_SUCCESSFUL) {
return 0;
} else {
errno = ENOMEM;
return -1;
}
}
|
