| /* |
| * Threading abstraction layer |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * Ensure gmtime_r is available even with -std=c99; must be defined before |
| * config.h, which pulls in glibc's features.h. Harmless on other platforms. |
| */ |
| #if !defined(_POSIX_C_SOURCE) |
| #define _POSIX_C_SOURCE 200112L |
| #endif |
| |
| #include "common.h" |
| |
| #if defined(MBEDTLS_THREADING_C) |
| |
| #include "mbedtls/threading.h" |
| |
| #if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_R_ALT) |
| |
| #if !defined(_WIN32) && (defined(unix) || \ |
| defined(__unix) || defined(__unix__) || (defined(__APPLE__) && \ |
| defined(__MACH__))) |
| #include <unistd.h> |
| #endif /* !_WIN32 && (unix || __unix || __unix__ || |
| * (__APPLE__ && __MACH__)) */ |
| |
| #if !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \ |
| ( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \ |
| _POSIX_THREAD_SAFE_FUNCTIONS >= 200112L ) ) |
| /* |
| * This is a convenience shorthand macro to avoid checking the long |
| * preprocessor conditions above. Ideally, we could expose this macro in |
| * platform_util.h and simply use it in platform_util.c, threading.c and |
| * threading.h. However, this macro is not part of the Mbed TLS public API, so |
| * we keep it private by only defining it in this file |
| */ |
| |
| #if ! ( defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) ) |
| #define THREADING_USE_GMTIME |
| #endif /* ! ( defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) ) */ |
| |
| #endif /* !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \ |
| ( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \ |
| _POSIX_THREAD_SAFE_FUNCTIONS >= 200112L ) ) */ |
| |
| #endif /* MBEDTLS_HAVE_TIME_DATE && !MBEDTLS_PLATFORM_GMTIME_R_ALT */ |
| |
| #if defined(MBEDTLS_THREADING_PTHREAD) |
| static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex ) |
| { |
| if( mutex == NULL ) |
| return; |
| |
| mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0; |
| } |
| |
| static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex ) |
| { |
| if( mutex == NULL || !mutex->is_valid ) |
| return; |
| |
| (void) pthread_mutex_destroy( &mutex->mutex ); |
| mutex->is_valid = 0; |
| } |
| |
| static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex ) |
| { |
| if( mutex == NULL || ! mutex->is_valid ) |
| return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA ); |
| |
| if( pthread_mutex_lock( &mutex->mutex ) != 0 ) |
| return( MBEDTLS_ERR_THREADING_MUTEX_ERROR ); |
| |
| return( 0 ); |
| } |
| |
| static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex ) |
| { |
| if( mutex == NULL || ! mutex->is_valid ) |
| return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA ); |
| |
| if( pthread_mutex_unlock( &mutex->mutex ) != 0 ) |
| return( MBEDTLS_ERR_THREADING_MUTEX_ERROR ); |
| |
| return( 0 ); |
| } |
| |
| void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread; |
| void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread; |
| int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread; |
| int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread; |
| |
| /* |
| * With phtreads we can statically initialize mutexes |
| */ |
| #define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 } |
| |
| #endif /* MBEDTLS_THREADING_PTHREAD */ |
| |
| #if defined(MBEDTLS_THREADING_ALT) |
| static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex ) |
| { |
| ((void) mutex ); |
| return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA ); |
| } |
| static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex ) |
| { |
| ((void) mutex ); |
| return; |
| } |
| |
| void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy; |
| void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy; |
| int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail; |
| int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail; |
| |
| /* |
| * Set functions pointers and initialize global mutexes |
| */ |
| void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ), |
| void (*mutex_free)( mbedtls_threading_mutex_t * ), |
| int (*mutex_lock)( mbedtls_threading_mutex_t * ), |
| int (*mutex_unlock)( mbedtls_threading_mutex_t * ) ) |
| { |
| mbedtls_mutex_init = mutex_init; |
| mbedtls_mutex_free = mutex_free; |
| mbedtls_mutex_lock = mutex_lock; |
| mbedtls_mutex_unlock = mutex_unlock; |
| |
| #if defined(MBEDTLS_FS_IO) |
| mbedtls_mutex_init( &mbedtls_threading_readdir_mutex ); |
| #endif |
| #if defined(THREADING_USE_GMTIME) |
| mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex ); |
| #endif |
| } |
| |
| /* |
| * Free global mutexes |
| */ |
| void mbedtls_threading_free_alt( void ) |
| { |
| #if defined(MBEDTLS_FS_IO) |
| mbedtls_mutex_free( &mbedtls_threading_readdir_mutex ); |
| #endif |
| #if defined(THREADING_USE_GMTIME) |
| mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex ); |
| #endif |
| } |
| #endif /* MBEDTLS_THREADING_ALT */ |
| |
| /* |
| * Define global mutexes |
| */ |
| #ifndef MUTEX_INIT |
| #define MUTEX_INIT |
| #endif |
| #if defined(MBEDTLS_FS_IO) |
| mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT; |
| #endif |
| #if defined(THREADING_USE_GMTIME) |
| mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT; |
| #endif |
| |
| #endif /* MBEDTLS_THREADING_C */ |