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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup rtems_ramdisk
*
* @brief RAM disk block device implementation.
*/
/*
* Copyright (C) 2009, 2012 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <rtems.h>
#include <rtems/ramdisk.h>
ramdisk *ramdisk_allocate(
void *area_begin,
uint32_t media_block_size,
rtems_blkdev_bnum media_block_count,
bool trace
)
{
struct ramdisk *rd = calloc(1, sizeof(*rd));
if (rd == NULL) {
return NULL;
}
if (area_begin == NULL) {
area_begin = calloc(media_block_count, media_block_size);
if (area_begin == NULL) {
free(rd);
return NULL;
}
rd->malloced = true;
} else {
rd->malloced = false;
}
rd->block_size = media_block_size;
rd->block_num = media_block_count;
rd->area = area_begin;
rd->trace = trace;
rd->initialized = true;
return rd;
}
void ramdisk_free(ramdisk *rd)
{
if (rd != NULL) {
if (rd->malloced) {
free(rd->area);
}
free(rd);
}
}
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