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