150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/*
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* Threading abstraction layer
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_THREADING_C)
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#include "mbedtls/threading.h"
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#if defined(MBEDTLS_THREADING_PTHREAD)
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static void threading_mutex_init_pthread( mbedtls_threading_mutex_t *mutex )
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{
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if( mutex == NULL )
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return;
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mutex->is_valid = pthread_mutex_init( &mutex->mutex, NULL ) == 0;
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}
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static void threading_mutex_free_pthread( mbedtls_threading_mutex_t *mutex )
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{
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if( mutex == NULL || !mutex->is_valid )
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return;
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(void) pthread_mutex_destroy( &mutex->mutex );
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mutex->is_valid = 0;
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}
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static int threading_mutex_lock_pthread( mbedtls_threading_mutex_t *mutex )
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{
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if( mutex == NULL || ! mutex->is_valid )
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return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
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if( pthread_mutex_lock( &mutex->mutex ) != 0 )
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return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
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return( 0 );
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}
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static int threading_mutex_unlock_pthread( mbedtls_threading_mutex_t *mutex )
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{
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if( mutex == NULL || ! mutex->is_valid )
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return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
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if( pthread_mutex_unlock( &mutex->mutex ) != 0 )
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return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
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return( 0 );
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}
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void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_init_pthread;
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void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_free_pthread;
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int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_lock_pthread;
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int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_unlock_pthread;
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/*
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* With phtreads we can statically initialize mutexes
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*/
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#define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 }
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#endif /* MBEDTLS_THREADING_PTHREAD */
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#if defined(MBEDTLS_THREADING_ALT)
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static int threading_mutex_fail( mbedtls_threading_mutex_t *mutex )
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{
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((void) mutex );
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return( MBEDTLS_ERR_THREADING_BAD_INPUT_DATA );
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}
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static void threading_mutex_dummy( mbedtls_threading_mutex_t *mutex )
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{
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((void) mutex );
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return;
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}
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void (*mbedtls_mutex_init)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
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void (*mbedtls_mutex_free)( mbedtls_threading_mutex_t * ) = threading_mutex_dummy;
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int (*mbedtls_mutex_lock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
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int (*mbedtls_mutex_unlock)( mbedtls_threading_mutex_t * ) = threading_mutex_fail;
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/*
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* Set functions pointers and initialize global mutexes
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*/
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void mbedtls_threading_set_alt( void (*mutex_init)( mbedtls_threading_mutex_t * ),
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void (*mutex_free)( mbedtls_threading_mutex_t * ),
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int (*mutex_lock)( mbedtls_threading_mutex_t * ),
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int (*mutex_unlock)( mbedtls_threading_mutex_t * ) )
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{
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mbedtls_mutex_init = mutex_init;
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mbedtls_mutex_free = mutex_free;
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mbedtls_mutex_lock = mutex_lock;
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mbedtls_mutex_unlock = mutex_unlock;
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#if defined(MBEDTLS_FS_IO)
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mbedtls_mutex_init( &mbedtls_threading_readdir_mutex );
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#endif
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#if defined(MBEDTLS_HAVE_TIME_DATE)
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mbedtls_mutex_init( &mbedtls_threading_gmtime_mutex );
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#endif
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}
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/*
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* Free global mutexes
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*/
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void mbedtls_threading_free_alt( void )
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{
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#if defined(MBEDTLS_FS_IO)
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mbedtls_mutex_free( &mbedtls_threading_readdir_mutex );
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#endif
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#if defined(MBEDTLS_HAVE_TIME_DATE)
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mbedtls_mutex_free( &mbedtls_threading_gmtime_mutex );
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#endif
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}
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#endif /* MBEDTLS_THREADING_ALT */
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/*
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* Define global mutexes
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*/
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#ifndef MUTEX_INIT
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#define MUTEX_INIT
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#endif
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#if defined(MBEDTLS_FS_IO)
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mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT;
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#endif
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#if defined(MBEDTLS_HAVE_TIME_DATE)
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mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT;
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#endif
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#endif /* MBEDTLS_THREADING_C */
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