diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/threading.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/library/threading.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/lib/mbedtls-2.27.0/library/threading.c b/lib/mbedtls-2.27.0/library/threading.c new file mode 100644 index 0000000..2de117f --- /dev/null +++ b/lib/mbedtls-2.27.0/library/threading.c @@ -0,0 +1,187 @@ +/* + * 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; + + /* A nonzero value of is_valid indicates a successfully initialized + * mutex. This is a workaround for not being able to return an error + * code for this function. The lock/unlock functions return an error + * if is_valid is nonzero. The Mbed TLS unit test code uses this field + * to distinguish more states of the mutex; see + * tests/src/threading_helpers for details. */ + 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 */ |