/* | |
* Threading abstraction layer | |
* | |
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved | |
* 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. | |
* | |
* This file is part of mbed TLS (https://tls.mbed.org) | |
*/ | |
/* | |
* 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 | |
#if !defined(MBEDTLS_CONFIG_FILE) | |
#include "mbedtls/config.h" | |
#else | |
#include MBEDTLS_CONFIG_FILE | |
#endif | |
#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 >= 20112L ) ) | |
/* | |
* 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 >= 20112L ) ) */ | |
#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 */ |