1/*
2 * alloc.c
3 *
4 * memory allocation and deallocation
5 *
6 * David A. McGrew
7 * Cisco Systems, Inc.
8 */
9/*
10 *
11 * Copyright (c) 2001-2006 Cisco Systems, Inc.
12 * 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 *
18 *   Redistributions of source code must retain the above copyright
19 *   notice, this list of conditions and the following disclaimer.
20 *
21 *   Redistributions in binary form must reproduce the above
22 *   copyright notice, this list of conditions and the following
23 *   disclaimer in the documentation and/or other materials provided
24 *   with the distribution.
25 *
26 *   Neither the name of the Cisco Systems, Inc. nor the names of its
27 *   contributors may be used to endorse or promote products derived
28 *   from this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
35 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
36 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
37 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
41 * OF THE POSSIBILITY OF SUCH DAMAGE.
42 *
43 */
44
45#include "alloc.h"
46#include "crypto_kernel.h"
47
48/* the debug module for memory allocation */
49
50debug_module_t mod_alloc = {
51  0,                  /* debugging is off by default */
52  "alloc"             /* printable name for module   */
53};
54
55/*
56 * Nota bene: the debugging statements for crypto_alloc() and
57 * crypto_free() have identical prefixes, which include the addresses
58 * of the memory locations on which they are operating.  This fact can
59 * be used to locate memory leaks, by turning on memory debugging,
60 * grepping for 'alloc', then matching alloc and free calls by
61 * address.
62 */
63
64#ifdef SRTP_KERNEL_LINUX
65
66#include <linux/interrupt.h>
67
68void *
69crypto_alloc(size_t size) {
70  void *ptr;
71
72  ptr = kmalloc(size, in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
73
74  if (ptr) {
75    debug_print(mod_alloc, "(location: %p) allocated", ptr);
76  } else
77    debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
78
79  return ptr;
80}
81
82void
83crypto_free(void *ptr) {
84
85  debug_print(mod_alloc, "(location: %p) freed", ptr);
86
87  kfree(ptr);
88}
89
90
91#elif defined(HAVE_STDLIB_H)
92
93void *
94crypto_alloc(size_t size) {
95  void *ptr;
96
97  ptr = malloc(size);
98
99  if (ptr) {
100    debug_print(mod_alloc, "(location: %p) allocated", ptr);
101  } else
102    debug_print(mod_alloc, "allocation failed (asked for %d bytes)\n", size);
103
104  return ptr;
105}
106
107void
108crypto_free(void *ptr) {
109
110  debug_print(mod_alloc, "(location: %p) freed", ptr);
111
112  free(ptr);
113}
114
115#else  /* we need to define our own memory allocation routines */
116
117#error no memory allocation defined yet
118
119#endif
120