1 /* Copyright (c) 2010 Lars Nordin <Lars.Nordin@SDlabs.se>
2 * Copyright (C) 2010 Simon Josefsson <simon@josefsson.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms,
6 * with or without modification, are permitted provided
7 * that the following conditions are met:
8 *
9 * Redistributions of source code must retain the above
10 * copyright notice, this list of conditions and the
11 * following disclaimer.
12 *
13 * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials
16 * provided with the distribution.
17 *
18 * Neither the name of the copyright holder nor the names
19 * of any other contributors may be used to endorse or
20 * promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
24 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
25 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
28 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
30 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
33 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
35 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
36 * OF SUCH DAMAGE.
37 */
38
39 #include "libssh2_priv.h"
40
41 static int _libssh2_initialized = 0;
42 static int _libssh2_init_flags = 0;
43
44 LIBSSH2_API int
libssh2_init(int flags)45 libssh2_init(int flags)
46 {
47 if(_libssh2_initialized == 0 && !(flags & LIBSSH2_INIT_NO_CRYPTO)) {
48 libssh2_crypto_init();
49 }
50
51 _libssh2_initialized++;
52 _libssh2_init_flags |= flags;
53
54 return 0;
55 }
56
57 LIBSSH2_API void
libssh2_exit(void)58 libssh2_exit(void)
59 {
60 if(_libssh2_initialized == 0)
61 return;
62
63 _libssh2_initialized--;
64
65 if(!(_libssh2_init_flags & LIBSSH2_INIT_NO_CRYPTO)) {
66 libssh2_crypto_exit();
67 }
68
69 return;
70 }
71
72 void
_libssh2_init_if_needed(void)73 _libssh2_init_if_needed(void)
74 {
75 if(_libssh2_initialized == 0)
76 (void)libssh2_init (0);
77 }
78