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) 2001-2017 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 #ifdef HAVE_CONFIG_H
46 #include <config.h>
47 #endif
48
49 #include "alloc.h"
50 #include "crypto_kernel.h"
51
52 /* the debug module for memory allocation */
53
54 srtp_debug_module_t srtp_mod_alloc = {
55 0, /* debugging is off by default */
56 "alloc" /* printable name for module */
57 };
58
59 /*
60 * Nota bene: the debugging statements for srtp_crypto_alloc() and
61 * srtp_crypto_free() have identical prefixes, which include the addresses
62 * of the memory locations on which they are operating. This fact can
63 * be used to locate memory leaks, by turning on memory debugging,
64 * grepping for 'alloc', then matching alloc and free calls by
65 * address.
66 */
67
68 #if defined(HAVE_STDLIB_H)
69
srtp_crypto_alloc(size_t size)70 void *srtp_crypto_alloc(size_t size)
71 {
72 void *ptr;
73
74 if (!size) {
75 return NULL;
76 }
77
78 ptr = calloc(1, size);
79
80 if (ptr) {
81 debug_print(srtp_mod_alloc, "(location: %p) allocated", ptr);
82 } else {
83 debug_print(srtp_mod_alloc, "allocation failed (asked for %d bytes)\n",
84 size);
85 }
86
87 return ptr;
88 }
89
srtp_crypto_free(void * ptr)90 void srtp_crypto_free(void *ptr)
91 {
92 debug_print(srtp_mod_alloc, "(location: %p) freed", ptr);
93
94 free(ptr);
95 }
96
97 #else /* we need to define our own memory allocation routines */
98
99 #error no memory allocation defined yet
100
101 #endif
102