1 /*
2 * Threading abstraction layer
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
8 * not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 * This file is part of mbed TLS (https://tls.mbed.org)
20 */
21
22 #if !defined(MBEDTLS_CONFIG_FILE)
23 #include "mbedtls/config.h"
24 #else
25 #include MBEDTLS_CONFIG_FILE
26 #endif
27
28 #if defined(MBEDTLS_THREADING_C)
29
30 #include "mbedtls/threading.h"
31
32 #if defined(MBEDTLS_THREADING_PTHREAD)
threading_mutex_init_pthread(mbedtls_threading_mutex_t * mutex)33 static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
34 {
35 if( mutex == NULL || mutex->is_valid )
36 return;
37
38 mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
39 }
40
threading_mutex_free_pthread(mbedtls_threading_mutex_t * mutex)41 static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex )
42 {
43 if( mutex == NULL || !mutex->is_valid )
44 return;
45
46 (void) pthread_mutex_destroy( &mutex->mutex );
47 mutex->is_valid = 0;
48 }
49
threading_mutex_lock_pthread(mbedtls_threading_mutex_t * mutex)50 static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex )
51 {
52 if( mutex == NULL || ! mutex->is_valid )
53 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
54
55 if( pthread_mutex_lock( &mutex->mutex ) != 0 )
56 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
57
58 return( 0 );
59 }
60
threading_mutex_unlock_pthread(mbedtls_threading_mutex_t * mutex)61 static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex )
62 {
63 if( mutex == NULL || ! mutex->is_valid )
64 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
65
66 if( pthread_mutex_unlock( &mutex->mutex ) != 0 )
67 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
68
69 return( 0 );
70 }
71
72 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread;
73 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread;
74 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread;
75 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread;
76
77 /*
78 * With phtreads we can statically initialize mutexes
79 */
80 #define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 }
81
82 #endif /* MBEDTLS_THREADING_PTHREAD */
83
84 #if defined(MBEDTLS_THREADING_ALT)
threading_mutex_fail(mbedtls_threading_mutex_t * mutex)85 static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex )
86 {
87 ((void) mutex );
88 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
89 }
threading_mutex_dummy(mbedtls_threading_mutex_t * mutex)90 static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex )
91 {
92 ((void) mutex );
93 return;
94 }
95
96 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
97 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
98 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
99 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
100
101 /*
102 * Set functions pointers and initialize global mutexes
103 */
mbedtls_threading_set_alt(void (* mutex_init)(mbedtls_threading_mutex_t *),void (* mutex_free)(mbedtls_threading_mutex_t *),int (* mutex_lock)(mbedtls_threading_mutex_t *),int (* mutex_unlock)(mbedtls_threading_mutex_t *))104 void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
105 void (*mutex_free)( mbedtls_threading_mutex_t * ),
106 int (*mutex_lock)( mbedtls_threading_mutex_t * ),
107 int (*mutex_unlock)( mbedtls_threading_mutex_t * ) )
108 {
109 mbedtls_mutex_init = mutex_init;
110 mbedtls_mutex_free = mutex_free;
111 mbedtls_mutex_lock = mutex_lock;
112 mbedtls_mutex_unlock = mutex_unlock;
113
114 mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
115 mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex );
116 }
117
118 /*
119 * Free global mutexes
120 */
mbedtls_threading_free_alt(void)121 void mbedtls_threading_free_alt( void )
122 {
123 mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
124 mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex );
125 }
126 #endif /* MBEDTLS_THREADING_ALT */
127
128 /*
129 * Define global mutexes
130 */
131 #ifndef MUTEX_INIT
132 #define MUTEX_INIT
133 #endif
134 mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
135 mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT;
136
137 #endif /* MBEDTLS_THREADING_C */
138
