Kev Mann / mbed-dev-OS5_10_4

RTC auf true

features/mbedtls/src/threading.c@0:38ceb79fef03, 2018-11-28 (annotated)

Committer:
kevman
Date:
Wed Nov 28 15:10:15 2018 +0000
Revision:
0:38ceb79fef03
RTC modified

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /*
kevman 0:38ceb79fef03 2 * Threading abstraction layer
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
kevman 0:38ceb79fef03 5 * SPDX-License-Identifier: Apache-2.0
kevman 0:38ceb79fef03 6 *
kevman 0:38ceb79fef03 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
kevman 0:38ceb79fef03 8 * not use this file except in compliance with the License.
kevman 0:38ceb79fef03 9 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 10 *
kevman 0:38ceb79fef03 11 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 12 *
kevman 0:38ceb79fef03 13 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
kevman 0:38ceb79fef03 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 16 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 17 * limitations under the License.
kevman 0:38ceb79fef03 18 *
kevman 0:38ceb79fef03 19 * This file is part of mbed TLS (https://tls.mbed.org)
kevman 0:38ceb79fef03 20 */
kevman 0:38ceb79fef03 21
kevman 0:38ceb79fef03 22 /*
kevman 0:38ceb79fef03 23 * Ensure gmtime_r is available even with -std=c99; must be defined before
kevman 0:38ceb79fef03 24 * config.h, which pulls in glibc's features.h. Harmless on other platforms.
kevman 0:38ceb79fef03 25 */
kevman 0:38ceb79fef03 26 #if !defined(_POSIX_C_SOURCE)
kevman 0:38ceb79fef03 27 #define _POSIX_C_SOURCE 200112L
kevman 0:38ceb79fef03 28 #endif
kevman 0:38ceb79fef03 29
kevman 0:38ceb79fef03 30 #if !defined(MBEDTLS_CONFIG_FILE)
kevman 0:38ceb79fef03 31 #include "mbedtls/config.h"
kevman 0:38ceb79fef03 32 #else
kevman 0:38ceb79fef03 33 #include MBEDTLS_CONFIG_FILE
kevman 0:38ceb79fef03 34 #endif
kevman 0:38ceb79fef03 35
kevman 0:38ceb79fef03 36 #if defined(MBEDTLS_THREADING_C)
kevman 0:38ceb79fef03 37
kevman 0:38ceb79fef03 38 #include "mbedtls/threading.h"
kevman 0:38ceb79fef03 39
kevman 0:38ceb79fef03 40 #if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_R_ALT)
kevman 0:38ceb79fef03 41
kevman 0:38ceb79fef03 42 #if !defined(_WIN32) && (defined(unix) || \
kevman 0:38ceb79fef03 43 defined(__unix) || defined(__unix__) || (defined(__APPLE__) && \
kevman 0:38ceb79fef03 44 defined(__MACH__)))
kevman 0:38ceb79fef03 45 #include <unistd.h>
kevman 0:38ceb79fef03 46 #endif /* !_WIN32 && (unix || __unix || __unix__ ||
kevman 0:38ceb79fef03 47 * (__APPLE__ && __MACH__)) */
kevman 0:38ceb79fef03 48
kevman 0:38ceb79fef03 49 #if !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \
kevman 0:38ceb79fef03 50 ( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \
kevman 0:38ceb79fef03 51 _POSIX_THREAD_SAFE_FUNCTIONS >= 20112L ) )
kevman 0:38ceb79fef03 52 /*
kevman 0:38ceb79fef03 53 * This is a convenience shorthand macro to avoid checking the long
kevman 0:38ceb79fef03 54 * preprocessor conditions above. Ideally, we could expose this macro in
kevman 0:38ceb79fef03 55 * platform_util.h and simply use it in platform_util.c, threading.c and
kevman 0:38ceb79fef03 56 * threading.h. However, this macro is not part of the Mbed TLS public API, so
kevman 0:38ceb79fef03 57 * we keep it private by only defining it in this file
kevman 0:38ceb79fef03 58 */
kevman 0:38ceb79fef03 59
kevman 0:38ceb79fef03 60 #if ! ( defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) )
kevman 0:38ceb79fef03 61 #define THREADING_USE_GMTIME
kevman 0:38ceb79fef03 62 #endif /* ! ( defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) ) */
kevman 0:38ceb79fef03 63
kevman 0:38ceb79fef03 64 #endif /* !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \
kevman 0:38ceb79fef03 65 ( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \
kevman 0:38ceb79fef03 66 _POSIX_THREAD_SAFE_FUNCTIONS >= 20112L ) ) */
kevman 0:38ceb79fef03 67
kevman 0:38ceb79fef03 68 #endif /* MBEDTLS_HAVE_TIME_DATE && !MBEDTLS_PLATFORM_GMTIME_R_ALT */
kevman 0:38ceb79fef03 69
kevman 0:38ceb79fef03 70 #if defined(MBEDTLS_THREADING_PTHREAD)
kevman 0:38ceb79fef03 71 static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
kevman 0:38ceb79fef03 72 {
kevman 0:38ceb79fef03 73 if( mutex == NULL )
kevman 0:38ceb79fef03 74 return;
kevman 0:38ceb79fef03 75
kevman 0:38ceb79fef03 76 mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
kevman 0:38ceb79fef03 77 }
kevman 0:38ceb79fef03 78
kevman 0:38ceb79fef03 79 static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex )
kevman 0:38ceb79fef03 80 {
kevman 0:38ceb79fef03 81 if( mutex == NULL || !mutex->is_valid )
kevman 0:38ceb79fef03 82 return;
kevman 0:38ceb79fef03 83
kevman 0:38ceb79fef03 84 (void) pthread_mutex_destroy( &mutex->mutex );
kevman 0:38ceb79fef03 85 mutex->is_valid = 0;
kevman 0:38ceb79fef03 86 }
kevman 0:38ceb79fef03 87
kevman 0:38ceb79fef03 88 static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex )
kevman 0:38ceb79fef03 89 {
kevman 0:38ceb79fef03 90 if( mutex == NULL || ! mutex->is_valid )
kevman 0:38ceb79fef03 91 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 92
kevman 0:38ceb79fef03 93 if( pthread_mutex_lock( &mutex->mutex ) != 0 )
kevman 0:38ceb79fef03 94 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
kevman 0:38ceb79fef03 95
kevman 0:38ceb79fef03 96 return( 0 );
kevman 0:38ceb79fef03 97 }
kevman 0:38ceb79fef03 98
kevman 0:38ceb79fef03 99 static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex )
kevman 0:38ceb79fef03 100 {
kevman 0:38ceb79fef03 101 if( mutex == NULL || ! mutex->is_valid )
kevman 0:38ceb79fef03 102 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 103
kevman 0:38ceb79fef03 104 if( pthread_mutex_unlock( &mutex->mutex ) != 0 )
kevman 0:38ceb79fef03 105 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
kevman 0:38ceb79fef03 106
kevman 0:38ceb79fef03 107 return( 0 );
kevman 0:38ceb79fef03 108 }
kevman 0:38ceb79fef03 109
kevman 0:38ceb79fef03 110 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread;
kevman 0:38ceb79fef03 111 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread;
kevman 0:38ceb79fef03 112 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread;
kevman 0:38ceb79fef03 113 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread;
kevman 0:38ceb79fef03 114
kevman 0:38ceb79fef03 115 /*
kevman 0:38ceb79fef03 116 * With phtreads we can statically initialize mutexes
kevman 0:38ceb79fef03 117 */
kevman 0:38ceb79fef03 118 #define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 }
kevman 0:38ceb79fef03 119
kevman 0:38ceb79fef03 120 #endif /* MBEDTLS_THREADING_PTHREAD */
kevman 0:38ceb79fef03 121
kevman 0:38ceb79fef03 122 #if defined(MBEDTLS_THREADING_ALT)
kevman 0:38ceb79fef03 123 static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex )
kevman 0:38ceb79fef03 124 {
kevman 0:38ceb79fef03 125 ((void) mutex );
kevman 0:38ceb79fef03 126 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
kevman 0:38ceb79fef03 127 }
kevman 0:38ceb79fef03 128 static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex )
kevman 0:38ceb79fef03 129 {
kevman 0:38ceb79fef03 130 ((void) mutex );
kevman 0:38ceb79fef03 131 return;
kevman 0:38ceb79fef03 132 }
kevman 0:38ceb79fef03 133
kevman 0:38ceb79fef03 134 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
kevman 0:38ceb79fef03 135 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
kevman 0:38ceb79fef03 136 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
kevman 0:38ceb79fef03 137 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
kevman 0:38ceb79fef03 138
kevman 0:38ceb79fef03 139 /*
kevman 0:38ceb79fef03 140 * Set functions pointers and initialize global mutexes
kevman 0:38ceb79fef03 141 */
kevman 0:38ceb79fef03 142 void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
kevman 0:38ceb79fef03 143 void (*mutex_free)( mbedtls_threading_mutex_t * ),
kevman 0:38ceb79fef03 144 int (*mutex_lock)( mbedtls_threading_mutex_t * ),
kevman 0:38ceb79fef03 145 int (*mutex_unlock)( mbedtls_threading_mutex_t * ) )
kevman 0:38ceb79fef03 146 {
kevman 0:38ceb79fef03 147 mbedtls_mutex_init = mutex_init;
kevman 0:38ceb79fef03 148 mbedtls_mutex_free = mutex_free;
kevman 0:38ceb79fef03 149 mbedtls_mutex_lock = mutex_lock;
kevman 0:38ceb79fef03 150 mbedtls_mutex_unlock = mutex_unlock;
kevman 0:38ceb79fef03 151
kevman 0:38ceb79fef03 152 #if defined(MBEDTLS_FS_IO)
kevman 0:38ceb79fef03 153 mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
kevman 0:38ceb79fef03 154 #endif
kevman 0:38ceb79fef03 155 #if defined(THREADING_USE_GMTIME)
kevman 0:38ceb79fef03 156 mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex );
kevman 0:38ceb79fef03 157 #endif
kevman 0:38ceb79fef03 158 }
kevman 0:38ceb79fef03 159
kevman 0:38ceb79fef03 160 /*
kevman 0:38ceb79fef03 161 * Free global mutexes
kevman 0:38ceb79fef03 162 */
kevman 0:38ceb79fef03 163 void mbedtls_threading_free_alt( void )
kevman 0:38ceb79fef03 164 {
kevman 0:38ceb79fef03 165 #if defined(MBEDTLS_FS_IO)
kevman 0:38ceb79fef03 166 mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
kevman 0:38ceb79fef03 167 #endif
kevman 0:38ceb79fef03 168 #if defined(THREADING_USE_GMTIME)
kevman 0:38ceb79fef03 169 mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex );
kevman 0:38ceb79fef03 170 #endif
kevman 0:38ceb79fef03 171 }
kevman 0:38ceb79fef03 172 #endif /* MBEDTLS_THREADING_ALT */
kevman 0:38ceb79fef03 173
kevman 0:38ceb79fef03 174 /*
kevman 0:38ceb79fef03 175 * Define global mutexes
kevman 0:38ceb79fef03 176 */
kevman 0:38ceb79fef03 177 #ifndef MUTEX_INIT
kevman 0:38ceb79fef03 178 #define MUTEX_INIT
kevman 0:38ceb79fef03 179 #endif
kevman 0:38ceb79fef03 180 #if defined(MBEDTLS_FS_IO)
kevman 0:38ceb79fef03 181 mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
kevman 0:38ceb79fef03 182 #endif
kevman 0:38ceb79fef03 183 #if defined(THREADING_USE_GMTIME)
kevman 0:38ceb79fef03 184 mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT;
kevman 0:38ceb79fef03 185 #endif
kevman 0:38ceb79fef03 186
kevman 0:38ceb79fef03 187 #endif /* MBEDTLS_THREADING_C */