EL4121 Embedded System / mbed-os

mbed-os

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features/mbedtls/src/threading.c@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /*
be_bryan 0:b74591d5ab33 2 * Threading abstraction layer
be_bryan 0:b74591d5ab33 3 *
be_bryan 0:b74591d5ab33 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
be_bryan 0:b74591d5ab33 5 * SPDX-License-Identifier: Apache-2.0
be_bryan 0:b74591d5ab33 6 *
be_bryan 0:b74591d5ab33 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
be_bryan 0:b74591d5ab33 8 * not use this file except in compliance with the License.
be_bryan 0:b74591d5ab33 9 * You may obtain a copy of the License at
be_bryan 0:b74591d5ab33 10 *
be_bryan 0:b74591d5ab33 11 * http://www.apache.org/licenses/LICENSE-2.0
be_bryan 0:b74591d5ab33 12 *
be_bryan 0:b74591d5ab33 13 * Unless required by applicable law or agreed to in writing, software
be_bryan 0:b74591d5ab33 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
be_bryan 0:b74591d5ab33 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
be_bryan 0:b74591d5ab33 16 * See the License for the specific language governing permissions and
be_bryan 0:b74591d5ab33 17 * limitations under the License.
be_bryan 0:b74591d5ab33 18 *
be_bryan 0:b74591d5ab33 19 * This file is part of mbed TLS (https://tls.mbed.org)
be_bryan 0:b74591d5ab33 20 */
be_bryan 0:b74591d5ab33 21
be_bryan 0:b74591d5ab33 22 #if !defined(MBEDTLS_CONFIG_FILE)
be_bryan 0:b74591d5ab33 23 #include "mbedtls/config.h"
be_bryan 0:b74591d5ab33 24 #else
be_bryan 0:b74591d5ab33 25 #include MBEDTLS_CONFIG_FILE
be_bryan 0:b74591d5ab33 26 #endif
be_bryan 0:b74591d5ab33 27
be_bryan 0:b74591d5ab33 28 #if defined(MBEDTLS_THREADING_C)
be_bryan 0:b74591d5ab33 29
be_bryan 0:b74591d5ab33 30 #include "mbedtls/threading.h"
be_bryan 0:b74591d5ab33 31
be_bryan 0:b74591d5ab33 32 #if defined(MBEDTLS_THREADING_PTHREAD)
be_bryan 0:b74591d5ab33 33 static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
be_bryan 0:b74591d5ab33 34 {
be_bryan 0:b74591d5ab33 35 if( mutex == NULL )
be_bryan 0:b74591d5ab33 36 return;
be_bryan 0:b74591d5ab33 37
be_bryan 0:b74591d5ab33 38 mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
be_bryan 0:b74591d5ab33 39 }
be_bryan 0:b74591d5ab33 40
be_bryan 0:b74591d5ab33 41 static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex )
be_bryan 0:b74591d5ab33 42 {
be_bryan 0:b74591d5ab33 43 if( mutex == NULL || !mutex->is_valid )
be_bryan 0:b74591d5ab33 44 return;
be_bryan 0:b74591d5ab33 45
be_bryan 0:b74591d5ab33 46 (void) pthread_mutex_destroy( &mutex->mutex );
be_bryan 0:b74591d5ab33 47 mutex->is_valid = 0;
be_bryan 0:b74591d5ab33 48 }
be_bryan 0:b74591d5ab33 49
be_bryan 0:b74591d5ab33 50 static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex )
be_bryan 0:b74591d5ab33 51 {
be_bryan 0:b74591d5ab33 52 if( mutex == NULL || ! mutex->is_valid )
be_bryan 0:b74591d5ab33 53 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 54
be_bryan 0:b74591d5ab33 55 if( pthread_mutex_lock( &mutex->mutex ) != 0 )
be_bryan 0:b74591d5ab33 56 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
be_bryan 0:b74591d5ab33 57
be_bryan 0:b74591d5ab33 58 return( 0 );
be_bryan 0:b74591d5ab33 59 }
be_bryan 0:b74591d5ab33 60
be_bryan 0:b74591d5ab33 61 static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex )
be_bryan 0:b74591d5ab33 62 {
be_bryan 0:b74591d5ab33 63 if( mutex == NULL || ! mutex->is_valid )
be_bryan 0:b74591d5ab33 64 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 65
be_bryan 0:b74591d5ab33 66 if( pthread_mutex_unlock( &mutex->mutex ) != 0 )
be_bryan 0:b74591d5ab33 67 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
be_bryan 0:b74591d5ab33 68
be_bryan 0:b74591d5ab33 69 return( 0 );
be_bryan 0:b74591d5ab33 70 }
be_bryan 0:b74591d5ab33 71
be_bryan 0:b74591d5ab33 72 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread;
be_bryan 0:b74591d5ab33 73 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread;
be_bryan 0:b74591d5ab33 74 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread;
be_bryan 0:b74591d5ab33 75 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread;
be_bryan 0:b74591d5ab33 76
be_bryan 0:b74591d5ab33 77 /*
be_bryan 0:b74591d5ab33 78 * With phtreads we can statically initialize mutexes
be_bryan 0:b74591d5ab33 79 */
be_bryan 0:b74591d5ab33 80 #define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 }
be_bryan 0:b74591d5ab33 81
be_bryan 0:b74591d5ab33 82 #endif /* MBEDTLS_THREADING_PTHREAD */
be_bryan 0:b74591d5ab33 83
be_bryan 0:b74591d5ab33 84 #if defined(MBEDTLS_THREADING_ALT)
be_bryan 0:b74591d5ab33 85 static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex )
be_bryan 0:b74591d5ab33 86 {
be_bryan 0:b74591d5ab33 87 ((void) mutex );
be_bryan 0:b74591d5ab33 88 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
be_bryan 0:b74591d5ab33 89 }
be_bryan 0:b74591d5ab33 90 static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex )
be_bryan 0:b74591d5ab33 91 {
be_bryan 0:b74591d5ab33 92 ((void) mutex );
be_bryan 0:b74591d5ab33 93 return;
be_bryan 0:b74591d5ab33 94 }
be_bryan 0:b74591d5ab33 95
be_bryan 0:b74591d5ab33 96 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
be_bryan 0:b74591d5ab33 97 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
be_bryan 0:b74591d5ab33 98 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
be_bryan 0:b74591d5ab33 99 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
be_bryan 0:b74591d5ab33 100
be_bryan 0:b74591d5ab33 101 /*
be_bryan 0:b74591d5ab33 102 * Set functions pointers and initialize global mutexes
be_bryan 0:b74591d5ab33 103 */
be_bryan 0:b74591d5ab33 104 void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
be_bryan 0:b74591d5ab33 105 void (*mutex_free)( mbedtls_threading_mutex_t * ),
be_bryan 0:b74591d5ab33 106 int (*mutex_lock)( mbedtls_threading_mutex_t * ),
be_bryan 0:b74591d5ab33 107 int (*mutex_unlock)( mbedtls_threading_mutex_t * ) )
be_bryan 0:b74591d5ab33 108 {
be_bryan 0:b74591d5ab33 109 mbedtls_mutex_init = mutex_init;
be_bryan 0:b74591d5ab33 110 mbedtls_mutex_free = mutex_free;
be_bryan 0:b74591d5ab33 111 mbedtls_mutex_lock = mutex_lock;
be_bryan 0:b74591d5ab33 112 mbedtls_mutex_unlock = mutex_unlock;
be_bryan 0:b74591d5ab33 113
be_bryan 0:b74591d5ab33 114 mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
be_bryan 0:b74591d5ab33 115 mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex );
be_bryan 0:b74591d5ab33 116 }
be_bryan 0:b74591d5ab33 117
be_bryan 0:b74591d5ab33 118 /*
be_bryan 0:b74591d5ab33 119 * Free global mutexes
be_bryan 0:b74591d5ab33 120 */
be_bryan 0:b74591d5ab33 121 void mbedtls_threading_free_alt( void )
be_bryan 0:b74591d5ab33 122 {
be_bryan 0:b74591d5ab33 123 mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
be_bryan 0:b74591d5ab33 124 mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex );
be_bryan 0:b74591d5ab33 125 }
be_bryan 0:b74591d5ab33 126 #endif /* MBEDTLS_THREADING_ALT */
be_bryan 0:b74591d5ab33 127
be_bryan 0:b74591d5ab33 128 /*
be_bryan 0:b74591d5ab33 129 * Define global mutexes
be_bryan 0:b74591d5ab33 130 */
be_bryan 0:b74591d5ab33 131 #ifndef MUTEX_INIT
be_bryan 0:b74591d5ab33 132 #define MUTEX_INIT
be_bryan 0:b74591d5ab33 133 #endif
be_bryan 0:b74591d5ab33 134 mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
be_bryan 0:b74591d5ab33 135 mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT;
be_bryan 0:b74591d5ab33 136
be_bryan 0:b74591d5ab33 137 #endif /* MBEDTLS_THREADING_C */