1 /* 2 * Threading abstraction layer 3 * 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved 5 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later 6 * 7 * This file is provided under the Apache License 2.0, or the 8 * GNU General Public License v2.0 or later. 9 * 10 * ********** 11 * Apache License 2.0: 12 * 13 * Licensed under the Apache License, Version 2.0 (the "License"); you may 14 * not use this file except in compliance with the License. 15 * You may obtain a copy of the License at 16 * 17 * http://www.apache.org/licenses/LICENSE-2.0 18 * 19 * Unless required by applicable law or agreed to in writing, software 20 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 21 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 22 * See the License for the specific language governing permissions and 23 * limitations under the License. 24 * 25 * ********** 26 * 27 * ********** 28 * GNU General Public License v2.0 or later: 29 * 30 * This program is free software; you can redistribute it and/or modify 31 * it under the terms of the GNU General Public License as published by 32 * the Free Software Foundation; either version 2 of the License, or 33 * (at your option) any later version. 34 * 35 * This program is distributed in the hope that it will be useful, 36 * but WITHOUT ANY WARRANTY; without even the implied warranty of 37 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 38 * GNU General Public License for more details. 39 * 40 * You should have received a copy of the GNU General Public License along 41 * with this program; if not, write to the Free Software Foundation, Inc., 42 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 43 * 44 * ********** 45 * 46 * This file is part of mbed TLS (https://tls.mbed.org) 47 */ 48 49 #if !defined(MBEDTLS_CONFIG_FILE) 50 #include "mbedtls/config.h" 51 #else 52 #include MBEDTLS_CONFIG_FILE 53 #endif 54 55 #if defined(MBEDTLS_THREADING_C) 56 57 #include "mbedtls/threading.h" 58 59 #if defined(MBEDTLS_THREADING_PTHREAD) 60 static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex ) 61 { 62 if( mutex == NULL ) 63 return; 64 65 mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0; 66 } 67 68 static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex ) 69 { 70 if( mutex == NULL || !mutex->is_valid ) 71 return; 72 73 (void) pthread_mutex_destroy( &mutex->mutex ); 74 mutex->is_valid = 0; 75 } 76 77 static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex ) 78 { 79 if( mutex == NULL || ! mutex->is_valid ) 80 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA ); 81 82 if( pthread_mutex_lock( &mutex->mutex ) != 0 ) 83 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR ); 84 85 return( 0 ); 86 } 87 88 static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex ) 89 { 90 if( mutex == NULL || ! mutex->is_valid ) 91 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA ); 92 93 if( pthread_mutex_unlock( &mutex->mutex ) != 0 ) 94 return( MBEDTLS_ERR_THREADING_MUTEX_ERROR ); 95 96 return( 0 ); 97 } 98 99 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread; 100 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread; 101 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread; 102 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread; 103 104 /* 105 * With phtreads we can statically initialize mutexes 106 */ 107 #define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 } 108 109 #endif /* MBEDTLS_THREADING_PTHREAD */ 110 111 #if defined(MBEDTLS_THREADING_ALT) 112 static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex ) 113 { 114 ((void) mutex ); 115 return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA ); 116 } 117 static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex ) 118 { 119 ((void) mutex ); 120 return; 121 } 122 123 void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy; 124 void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy; 125 int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail; 126 int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail; 127 128 /* 129 * Set functions pointers and initialize global mutexes 130 */ 131 void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ), 132 void (*mutex_free)( mbedtls_threading_mutex_t * ), 133 int (*mutex_lock)( mbedtls_threading_mutex_t * ), 134 int (*mutex_unlock)( mbedtls_threading_mutex_t * ) ) 135 { 136 mbedtls_mutex_init = mutex_init; 137 mbedtls_mutex_free = mutex_free; 138 mbedtls_mutex_lock = mutex_lock; 139 mbedtls_mutex_unlock = mutex_unlock; 140 141 #if defined(MBEDTLS_FS_IO) 142 mbedtls_mutex_init( &mbedtls_threading_readdir_mutex ); 143 #endif 144 #if defined(MBEDTLS_HAVE_TIME_DATE) 145 mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex ); 146 #endif 147 } 148 149 /* 150 * Free global mutexes 151 */ 152 void mbedtls_threading_free_alt( void ) 153 { 154 #if defined(MBEDTLS_FS_IO) 155 mbedtls_mutex_free( &mbedtls_threading_readdir_mutex ); 156 #endif 157 #if defined(MBEDTLS_HAVE_TIME_DATE) 158 mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex ); 159 #endif 160 } 161 #endif /* MBEDTLS_THREADING_ALT */ 162 163 /* 164 * Define global mutexes 165 */ 166 #ifndef MUTEX_INIT 167 #define MUTEX_INIT 168 #endif 169 #if defined(MBEDTLS_FS_IO) 170 mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT; 171 #endif 172 #if defined(MBEDTLS_HAVE_TIME_DATE) 173 mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT; 174 #endif 175 176 #endif /* MBEDTLS_THREADING_C */ 177