source: rtems/cpukit/libblock/src/ramdisk-init.c @ 255fe43

Last change on this file since 255fe43 was 255fe43, checked in by Joel Sherrill <joel@…>, on 03/01/22 at 20:40:44

cpukit/: Scripted embedded brains header file clean up

Updates #4625.

  • Property mode set to 100644
File size: 2.3 KB
Line 
1/* SPDX-License-Identifier: BSD-2-Clause */
2
3/**
4 * @file
5 *
6 * @ingroup rtems_ramdisk
7 *
8 * @brief RAM disk block device implementation.
9 */
10
11/*
12 * Copyright (c) 2009-2012 embedded brains GmbH.  All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 *    notice, this list of conditions and the following disclaimer in the
21 *    documentation and/or other materials provided with the distribution.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36#ifdef HAVE_CONFIG_H
37#include "config.h"
38#endif
39
40#include <stdlib.h>
41
42#include <rtems.h>
43#include <rtems/ramdisk.h>
44
45ramdisk *ramdisk_allocate(
46  void *area_begin,
47  uint32_t media_block_size,
48  rtems_blkdev_bnum media_block_count,
49  bool trace
50)
51{
52  struct ramdisk *rd = calloc(1, sizeof(*rd));
53
54  if (rd == NULL) {
55    return NULL;
56  }
57
58  if (area_begin == NULL) {
59    area_begin = calloc(media_block_count, media_block_size);
60    if (area_begin == NULL) {
61      free(rd);
62
63      return NULL;
64    }
65    rd->malloced = true;
66  } else {
67    rd->malloced = false;
68  }
69  rd->block_size = media_block_size;
70  rd->block_num = media_block_count;
71  rd->area = area_begin;
72  rd->trace = trace;
73  rd->initialized = true;
74
75  return rd;
76}
77
78void ramdisk_free(ramdisk *rd)
79{
80  if (rd != NULL) {
81    if (rd->malloced) {
82      free(rd->area);
83    }
84    free(rd);
85  }
86}
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