Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/features/mbedtls/src/threading.c@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

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marcozecchini 0:9fca2b23d0ba 1 /*
marcozecchini 0:9fca2b23d0ba 2 * Threading abstraction layer
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
marcozecchini 0:9fca2b23d0ba 5 * SPDX-License-Identifier: Apache-2.0
marcozecchini 0:9fca2b23d0ba 6 *
marcozecchini 0:9fca2b23d0ba 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
marcozecchini 0:9fca2b23d0ba 8 * not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 9 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 10 *
marcozecchini 0:9fca2b23d0ba 11 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 12 *
marcozecchini 0:9fca2b23d0ba 13 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
marcozecchini 0:9fca2b23d0ba 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 16 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 17 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 18 *
marcozecchini 0:9fca2b23d0ba 19 * This file is part of mbed TLS (https://tls.mbed.org)
marcozecchini 0:9fca2b23d0ba 20 */
marcozecchini 0:9fca2b23d0ba 21
marcozecchini 0:9fca2b23d0ba 22 #if !defined(MBEDTLS_CONFIG_FILE)
marcozecchini 0:9fca2b23d0ba 23 #include "mbedtls/config.h"
marcozecchini 0:9fca2b23d0ba 24 #else
marcozecchini 0:9fca2b23d0ba 25 #include MBEDTLS_CONFIG_FILE
marcozecchini 0:9fca2b23d0ba 26 #endif
marcozecchini 0:9fca2b23d0ba 27
marcozecchini 0:9fca2b23d0ba 28 #if defined(MBEDTLS_THREADING_C)
marcozecchini 0:9fca2b23d0ba 29
marcozecchini 0:9fca2b23d0ba 30 #include "mbedtls/threading.h"
marcozecchini 0:9fca2b23d0ba 31
marcozecchini 0:9fca2b23d0ba 32 #if defined(MBEDTLS_THREADING_PTHREAD)
marcozecchini 0:9fca2b23d0ba 33 static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
marcozecchini 0:9fca2b23d0ba 34 {
marcozecchini 0:9fca2b23d0ba 35 if( mutex == NULL )
marcozecchini 0:9fca2b23d0ba 36 return;
marcozecchini 0:9fca2b23d0ba 37
marcozecchini 0:9fca2b23d0ba 38 mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
marcozecchini 0:9fca2b23d0ba 39 }
marcozecchini 0:9fca2b23d0ba 40
marcozecchini 0:9fca2b23d0ba 41 static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex )
marcozecchini 0:9fca2b23d0ba 42 {
marcozecchini 0:9fca2b23d0ba 43 if( mutex == NULL || !mutex->is_valid )
marcozecchini 0:9fca2b23d0ba 44 return;
marcozecchini 0:9fca2b23d0ba 45
marcozecchini 0:9fca2b23d0ba 46 (void) pthread_mutex_destroy( &mutex->mutex );
marcozecchini 0:9fca2b23d0ba 47 mutex->is_valid = 0;
marcozecchini 0:9fca2b23d0ba 48 }
marcozecchini 0:9fca2b23d0ba 49
marcozecchini 0:9fca2b23d0ba 50 static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex )
marcozecchini 0:9fca2b23d0ba 51 {
marcozecchini 0:9fca2b23d0ba 52 if( mutex == NULL || ! mutex->is_valid )
marcozecchini 0:9fca2b23d0ba 53 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 54
marcozecchini 0:9fca2b23d0ba 55 if( pthread_mutex_lock( &mutex->mutex ) != 0 )
marcozecchini 0:9fca2b23d0ba 56 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
marcozecchini 0:9fca2b23d0ba 57
marcozecchini 0:9fca2b23d0ba 58 return( 0 );
marcozecchini 0:9fca2b23d0ba 59 }
marcozecchini 0:9fca2b23d0ba 60
marcozecchini 0:9fca2b23d0ba 61 static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex )
marcozecchini 0:9fca2b23d0ba 62 {
marcozecchini 0:9fca2b23d0ba 63 if( mutex == NULL || ! mutex->is_valid )
marcozecchini 0:9fca2b23d0ba 64 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 65
marcozecchini 0:9fca2b23d0ba 66 if( pthread_mutex_unlock( &mutex->mutex ) != 0 )
marcozecchini 0:9fca2b23d0ba 67 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
marcozecchini 0:9fca2b23d0ba 68
marcozecchini 0:9fca2b23d0ba 69 return( 0 );
marcozecchini 0:9fca2b23d0ba 70 }
marcozecchini 0:9fca2b23d0ba 71
marcozecchini 0:9fca2b23d0ba 72 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread;
marcozecchini 0:9fca2b23d0ba 73 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread;
marcozecchini 0:9fca2b23d0ba 74 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread;
marcozecchini 0:9fca2b23d0ba 75 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread;
marcozecchini 0:9fca2b23d0ba 76
marcozecchini 0:9fca2b23d0ba 77 /*
marcozecchini 0:9fca2b23d0ba 78 * With phtreads we can statically initialize mutexes
marcozecchini 0:9fca2b23d0ba 79 */
marcozecchini 0:9fca2b23d0ba 80 #define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 }
marcozecchini 0:9fca2b23d0ba 81
marcozecchini 0:9fca2b23d0ba 82 #endif /* MBEDTLS_THREADING_PTHREAD */
marcozecchini 0:9fca2b23d0ba 83
marcozecchini 0:9fca2b23d0ba 84 #if defined(MBEDTLS_THREADING_ALT)
marcozecchini 0:9fca2b23d0ba 85 static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex )
marcozecchini 0:9fca2b23d0ba 86 {
marcozecchini 0:9fca2b23d0ba 87 ((void) mutex );
marcozecchini 0:9fca2b23d0ba 88 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 89 }
marcozecchini 0:9fca2b23d0ba 90 static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex )
marcozecchini 0:9fca2b23d0ba 91 {
marcozecchini 0:9fca2b23d0ba 92 ((void) mutex );
marcozecchini 0:9fca2b23d0ba 93 return;
marcozecchini 0:9fca2b23d0ba 94 }
marcozecchini 0:9fca2b23d0ba 95
marcozecchini 0:9fca2b23d0ba 96 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
marcozecchini 0:9fca2b23d0ba 97 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
marcozecchini 0:9fca2b23d0ba 98 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
marcozecchini 0:9fca2b23d0ba 99 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
marcozecchini 0:9fca2b23d0ba 100
marcozecchini 0:9fca2b23d0ba 101 /*
marcozecchini 0:9fca2b23d0ba 102 * Set functions pointers and initialize global mutexes
marcozecchini 0:9fca2b23d0ba 103 */
marcozecchini 0:9fca2b23d0ba 104 void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
marcozecchini 0:9fca2b23d0ba 105 void (*mutex_free)( mbedtls_threading_mutex_t * ),
marcozecchini 0:9fca2b23d0ba 106 int (*mutex_lock)( mbedtls_threading_mutex_t * ),
marcozecchini 0:9fca2b23d0ba 107 int (*mutex_unlock)( mbedtls_threading_mutex_t * ) )
marcozecchini 0:9fca2b23d0ba 108 {
marcozecchini 0:9fca2b23d0ba 109 mbedtls_mutex_init = mutex_init;
marcozecchini 0:9fca2b23d0ba 110 mbedtls_mutex_free = mutex_free;
marcozecchini 0:9fca2b23d0ba 111 mbedtls_mutex_lock = mutex_lock;
marcozecchini 0:9fca2b23d0ba 112 mbedtls_mutex_unlock = mutex_unlock;
marcozecchini 0:9fca2b23d0ba 113
marcozecchini 0:9fca2b23d0ba 114 mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
marcozecchini 0:9fca2b23d0ba 115 mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex );
marcozecchini 0:9fca2b23d0ba 116 }
marcozecchini 0:9fca2b23d0ba 117
marcozecchini 0:9fca2b23d0ba 118 /*
marcozecchini 0:9fca2b23d0ba 119 * Free global mutexes
marcozecchini 0:9fca2b23d0ba 120 */
marcozecchini 0:9fca2b23d0ba 121 void mbedtls_threading_free_alt( void )
marcozecchini 0:9fca2b23d0ba 122 {
marcozecchini 0:9fca2b23d0ba 123 mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
marcozecchini 0:9fca2b23d0ba 124 mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex );
marcozecchini 0:9fca2b23d0ba 125 }
marcozecchini 0:9fca2b23d0ba 126 #endif /* MBEDTLS_THREADING_ALT */
marcozecchini 0:9fca2b23d0ba 127
marcozecchini 0:9fca2b23d0ba 128 /*
marcozecchini 0:9fca2b23d0ba 129 * Define global mutexes
marcozecchini 0:9fca2b23d0ba 130 */
marcozecchini 0:9fca2b23d0ba 131 #ifndef MUTEX_INIT
marcozecchini 0:9fca2b23d0ba 132 #define MUTEX_INIT
marcozecchini 0:9fca2b23d0ba 133 #endif
marcozecchini 0:9fca2b23d0ba 134 mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
marcozecchini 0:9fca2b23d0ba 135 mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT;
marcozecchini 0:9fca2b23d0ba 136
marcozecchini 0:9fca2b23d0ba 137 #endif /* MBEDTLS_THREADING_C */