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Merge branch 'master' into fix_iclass_sim
[proxmark3-svn] / common / mbedtls / threading.c
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700d8687
OM
1/*
2 * Threading abstraction layer
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: GPL-2.0
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * This file is part of mbed TLS (https://tls.mbed.org)
22 */
23
24#if !defined(MBEDTLS_CONFIG_FILE)
25#include "mbedtls/config.h"
26#else
27#include MBEDTLS_CONFIG_FILE
28#endif
29
30#if defined(MBEDTLS_THREADING_C)
31
32#include "mbedtls/threading.h"
33
34#if defined(MBEDTLS_THREADING_PTHREAD)
35static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
36{
37 if( mutex == NULL )
38 return;
39
40 mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
41}
42
43static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex )
44{
45 if( mutex == NULL || !mutex->is_valid )
46 return;
47
48 (void) pthread_mutex_destroy( &mutex->mutex );
49 mutex->is_valid = 0;
50}
51
52static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex )
53{
54 if( mutex == NULL || ! mutex->is_valid )
55 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
56
57 if( pthread_mutex_lock( &mutex->mutex ) != 0 )
58 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
59
60 return( 0 );
61}
62
63static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex )
64{
65 if( mutex == NULL || ! mutex->is_valid )
66 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
67
68 if( pthread_mutex_unlock( &mutex->mutex ) != 0 )
69 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
70
71 return( 0 );
72}
73
74void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread;
75void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread;
76int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread;
77int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread;
78
79/*
80 * With phtreads we can statically initialize mutexes
81 */
82#define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 }
83
84#endif /* MBEDTLS_THREADING_PTHREAD */
85
86#if defined(MBEDTLS_THREADING_ALT)
87static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex )
88{
89 ((void) mutex );
90 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
91}
92static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex )
93{
94 ((void) mutex );
95 return;
96}
97
98void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
99void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
100int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
101int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
102
103/*
104 * Set functions pointers and initialize global mutexes
105 */
106void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
107 void (*mutex_free)( mbedtls_threading_mutex_t * ),
108 int (*mutex_lock)( mbedtls_threading_mutex_t * ),
109 int (*mutex_unlock)( mbedtls_threading_mutex_t * ) )
110{
111 mbedtls_mutex_init = mutex_init;
112 mbedtls_mutex_free = mutex_free;
113 mbedtls_mutex_lock = mutex_lock;
114 mbedtls_mutex_unlock = mutex_unlock;
115
116#if defined(MBEDTLS_FS_IO)
117 mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
118#endif
119}
120
121/*
122 * Free global mutexes
123 */
124void mbedtls_threading_free_alt( void )
125{
126#if defined(MBEDTLS_FS_IO)
127 mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
128#endif
129}
130#endif /* MBEDTLS_THREADING_ALT */
131
132/*
133 * Define global mutexes
134 */
135#ifndef MUTEX_INIT
136#define MUTEX_INIT
137#endif
138#if defined(MBEDTLS_FS_IO)
139mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
140#endif
141
142#endif /* MBEDTLS_THREADING_C */
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