Simon Cooksey / mbed-os

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features/mbedtls/src/threading.c@0:fb7af294d5d9, 2016-11-17 (annotated)

Committer:
Simon Cooksey
Date:
Thu Nov 17 16:43:53 2016 +0000
Revision:
0:fb7af294d5d9
Initial commit

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Simon Cooksey 0:fb7af294d5d9 1 /*
Simon Cooksey 0:fb7af294d5d9 2 * Threading abstraction layer
Simon Cooksey 0:fb7af294d5d9 3 *
Simon Cooksey 0:fb7af294d5d9 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
Simon Cooksey 0:fb7af294d5d9 5 * SPDX-License-Identifier: Apache-2.0
Simon Cooksey 0:fb7af294d5d9 6 *
Simon Cooksey 0:fb7af294d5d9 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
Simon Cooksey 0:fb7af294d5d9 8 * not use this file except in compliance with the License.
Simon Cooksey 0:fb7af294d5d9 9 * You may obtain a copy of the License at
Simon Cooksey 0:fb7af294d5d9 10 *
Simon Cooksey 0:fb7af294d5d9 11 * http://www.apache.org/licenses/LICENSE-2.0
Simon Cooksey 0:fb7af294d5d9 12 *
Simon Cooksey 0:fb7af294d5d9 13 * Unless required by applicable law or agreed to in writing, software
Simon Cooksey 0:fb7af294d5d9 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
Simon Cooksey 0:fb7af294d5d9 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Simon Cooksey 0:fb7af294d5d9 16 * See the License for the specific language governing permissions and
Simon Cooksey 0:fb7af294d5d9 17 * limitations under the License.
Simon Cooksey 0:fb7af294d5d9 18 *
Simon Cooksey 0:fb7af294d5d9 19 * This file is part of mbed TLS (https://tls.mbed.org)
Simon Cooksey 0:fb7af294d5d9 20 */
Simon Cooksey 0:fb7af294d5d9 21
Simon Cooksey 0:fb7af294d5d9 22 #if !defined(MBEDTLS_CONFIG_FILE)
Simon Cooksey 0:fb7af294d5d9 23 #include "mbedtls/config.h"
Simon Cooksey 0:fb7af294d5d9 24 #else
Simon Cooksey 0:fb7af294d5d9 25 #include MBEDTLS_CONFIG_FILE
Simon Cooksey 0:fb7af294d5d9 26 #endif
Simon Cooksey 0:fb7af294d5d9 27
Simon Cooksey 0:fb7af294d5d9 28 #if defined(MBEDTLS_THREADING_C)
Simon Cooksey 0:fb7af294d5d9 29
Simon Cooksey 0:fb7af294d5d9 30 #include "mbedtls/threading.h"
Simon Cooksey 0:fb7af294d5d9 31
Simon Cooksey 0:fb7af294d5d9 32 #if defined(MBEDTLS_THREADING_PTHREAD)
Simon Cooksey 0:fb7af294d5d9 33 static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
Simon Cooksey 0:fb7af294d5d9 34 {
Simon Cooksey 0:fb7af294d5d9 35 if( mutex == NULL || mutex->is_valid )
Simon Cooksey 0:fb7af294d5d9 36 return;
Simon Cooksey 0:fb7af294d5d9 37
Simon Cooksey 0:fb7af294d5d9 38 mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
Simon Cooksey 0:fb7af294d5d9 39 }
Simon Cooksey 0:fb7af294d5d9 40
Simon Cooksey 0:fb7af294d5d9 41 static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex )
Simon Cooksey 0:fb7af294d5d9 42 {
Simon Cooksey 0:fb7af294d5d9 43 if( mutex == NULL || !mutex->is_valid )
Simon Cooksey 0:fb7af294d5d9 44 return;
Simon Cooksey 0:fb7af294d5d9 45
Simon Cooksey 0:fb7af294d5d9 46 (void) pthread_mutex_destroy( &mutex->mutex );
Simon Cooksey 0:fb7af294d5d9 47 mutex->is_valid = 0;
Simon Cooksey 0:fb7af294d5d9 48 }
Simon Cooksey 0:fb7af294d5d9 49
Simon Cooksey 0:fb7af294d5d9 50 static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex )
Simon Cooksey 0:fb7af294d5d9 51 {
Simon Cooksey 0:fb7af294d5d9 52 if( mutex == NULL || ! mutex->is_valid )
Simon Cooksey 0:fb7af294d5d9 53 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 54
Simon Cooksey 0:fb7af294d5d9 55 if( pthread_mutex_lock( &mutex->mutex ) != 0 )
Simon Cooksey 0:fb7af294d5d9 56 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
Simon Cooksey 0:fb7af294d5d9 57
Simon Cooksey 0:fb7af294d5d9 58 return( 0 );
Simon Cooksey 0:fb7af294d5d9 59 }
Simon Cooksey 0:fb7af294d5d9 60
Simon Cooksey 0:fb7af294d5d9 61 static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex )
Simon Cooksey 0:fb7af294d5d9 62 {
Simon Cooksey 0:fb7af294d5d9 63 if( mutex == NULL || ! mutex->is_valid )
Simon Cooksey 0:fb7af294d5d9 64 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 65
Simon Cooksey 0:fb7af294d5d9 66 if( pthread_mutex_unlock( &mutex->mutex ) != 0 )
Simon Cooksey 0:fb7af294d5d9 67 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
Simon Cooksey 0:fb7af294d5d9 68
Simon Cooksey 0:fb7af294d5d9 69 return( 0 );
Simon Cooksey 0:fb7af294d5d9 70 }
Simon Cooksey 0:fb7af294d5d9 71
Simon Cooksey 0:fb7af294d5d9 72 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread;
Simon Cooksey 0:fb7af294d5d9 73 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread;
Simon Cooksey 0:fb7af294d5d9 74 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread;
Simon Cooksey 0:fb7af294d5d9 75 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread;
Simon Cooksey 0:fb7af294d5d9 76
Simon Cooksey 0:fb7af294d5d9 77 /*
Simon Cooksey 0:fb7af294d5d9 78 * With phtreads we can statically initialize mutexes
Simon Cooksey 0:fb7af294d5d9 79 */
Simon Cooksey 0:fb7af294d5d9 80 #define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 }
Simon Cooksey 0:fb7af294d5d9 81
Simon Cooksey 0:fb7af294d5d9 82 #endif /* MBEDTLS_THREADING_PTHREAD */
Simon Cooksey 0:fb7af294d5d9 83
Simon Cooksey 0:fb7af294d5d9 84 #if defined(MBEDTLS_THREADING_ALT)
Simon Cooksey 0:fb7af294d5d9 85 static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex )
Simon Cooksey 0:fb7af294d5d9 86 {
Simon Cooksey 0:fb7af294d5d9 87 ((void) mutex );
Simon Cooksey 0:fb7af294d5d9 88 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 89 }
Simon Cooksey 0:fb7af294d5d9 90 static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex )
Simon Cooksey 0:fb7af294d5d9 91 {
Simon Cooksey 0:fb7af294d5d9 92 ((void) mutex );
Simon Cooksey 0:fb7af294d5d9 93 return;
Simon Cooksey 0:fb7af294d5d9 94 }
Simon Cooksey 0:fb7af294d5d9 95
Simon Cooksey 0:fb7af294d5d9 96 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
Simon Cooksey 0:fb7af294d5d9 97 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
Simon Cooksey 0:fb7af294d5d9 98 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
Simon Cooksey 0:fb7af294d5d9 99 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
Simon Cooksey 0:fb7af294d5d9 100
Simon Cooksey 0:fb7af294d5d9 101 /*
Simon Cooksey 0:fb7af294d5d9 102 * Set functions pointers and initialize global mutexes
Simon Cooksey 0:fb7af294d5d9 103 */
Simon Cooksey 0:fb7af294d5d9 104 void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
Simon Cooksey 0:fb7af294d5d9 105 void (*mutex_free)( mbedtls_threading_mutex_t * ),
Simon Cooksey 0:fb7af294d5d9 106 int (*mutex_lock)( mbedtls_threading_mutex_t * ),
Simon Cooksey 0:fb7af294d5d9 107 int (*mutex_unlock)( mbedtls_threading_mutex_t * ) )
Simon Cooksey 0:fb7af294d5d9 108 {
Simon Cooksey 0:fb7af294d5d9 109 mbedtls_mutex_init = mutex_init;
Simon Cooksey 0:fb7af294d5d9 110 mbedtls_mutex_free = mutex_free;
Simon Cooksey 0:fb7af294d5d9 111 mbedtls_mutex_lock = mutex_lock;
Simon Cooksey 0:fb7af294d5d9 112 mbedtls_mutex_unlock = mutex_unlock;
Simon Cooksey 0:fb7af294d5d9 113
Simon Cooksey 0:fb7af294d5d9 114 mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
Simon Cooksey 0:fb7af294d5d9 115 mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex );
Simon Cooksey 0:fb7af294d5d9 116 }
Simon Cooksey 0:fb7af294d5d9 117
Simon Cooksey 0:fb7af294d5d9 118 /*
Simon Cooksey 0:fb7af294d5d9 119 * Free global mutexes
Simon Cooksey 0:fb7af294d5d9 120 */
Simon Cooksey 0:fb7af294d5d9 121 void mbedtls_threading_free_alt( void )
Simon Cooksey 0:fb7af294d5d9 122 {
Simon Cooksey 0:fb7af294d5d9 123 mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
Simon Cooksey 0:fb7af294d5d9 124 mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex );
Simon Cooksey 0:fb7af294d5d9 125 }
Simon Cooksey 0:fb7af294d5d9 126 #endif /* MBEDTLS_THREADING_ALT */
Simon Cooksey 0:fb7af294d5d9 127
Simon Cooksey 0:fb7af294d5d9 128 /*
Simon Cooksey 0:fb7af294d5d9 129 * Define global mutexes
Simon Cooksey 0:fb7af294d5d9 130 */
Simon Cooksey 0:fb7af294d5d9 131 #ifndef MUTEX_INIT
Simon Cooksey 0:fb7af294d5d9 132 #define MUTEX_INIT
Simon Cooksey 0:fb7af294d5d9 133 #endif
Simon Cooksey 0:fb7af294d5d9 134 mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
Simon Cooksey 0:fb7af294d5d9 135 mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT;
Simon Cooksey 0:fb7af294d5d9 136
Simon Cooksey 0:fb7af294d5d9 137 #endif /* MBEDTLS_THREADING_C */