mbedtls/library/threading.c

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/*
* Threading abstraction layer
*
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* Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
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*
* This file is part of mbed TLS (http://www.polarssl.org)
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*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if !defined(POLARSSL_CONFIG_FILE)
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#include "polarssl/config.h"
#else
#include POLARSSL_CONFIG_FILE
#endif
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#if defined(POLARSSL_THREADING_C)
#include "polarssl/threading.h"
#if defined(POLARSSL_THREADING_PTHREAD)
static int threading_mutex_init_pthread( threading_mutex_t *mutex )
{
if( mutex == NULL )
return( POLARSSL_ERR_THREADING_BAD_INPUT_DATA );
if( pthread_mutex_init( mutex, NULL ) != 0 )
return( POLARSSL_ERR_THREADING_MUTEX_ERROR );
return( 0 );
}
static int threading_mutex_free_pthread( threading_mutex_t *mutex )
{
if( mutex == NULL )
return( POLARSSL_ERR_THREADING_BAD_INPUT_DATA );
if( pthread_mutex_destroy( mutex ) != 0 )
return( POLARSSL_ERR_THREADING_MUTEX_ERROR );
return( 0 );
}
static int threading_mutex_lock_pthread( threading_mutex_t *mutex )
{
if( mutex == NULL )
return( POLARSSL_ERR_THREADING_BAD_INPUT_DATA );
if( pthread_mutex_lock( mutex ) != 0 )
return( POLARSSL_ERR_THREADING_MUTEX_ERROR );
return( 0 );
}
static int threading_mutex_unlock_pthread( threading_mutex_t *mutex )
{
if( mutex == NULL )
return( POLARSSL_ERR_THREADING_BAD_INPUT_DATA );
if( pthread_mutex_unlock( mutex ) != 0 )
return( POLARSSL_ERR_THREADING_MUTEX_ERROR );
return( 0 );
}
int (*polarssl_mutex_init)( threading_mutex_t * ) = threading_mutex_init_pthread;
int (*polarssl_mutex_free)( threading_mutex_t * ) = threading_mutex_free_pthread;
int (*polarssl_mutex_lock)( threading_mutex_t * ) = threading_mutex_lock_pthread;
int (*polarssl_mutex_unlock)( threading_mutex_t * ) = threading_mutex_unlock_pthread;
#endif /* POLARSSL_THREADING_PTHREAD */
#if defined(POLARSSL_THREADING_ALT)
static int threading_mutex_fail( threading_mutex_t *mutex )
{
((void) mutex );
return( POLARSSL_ERR_THREADING_BAD_INPUT_DATA );
}
int (*polarssl_mutex_init)( threading_mutex_t * ) = threading_mutex_fail;
int (*polarssl_mutex_free)( threading_mutex_t * ) = threading_mutex_fail;
int (*polarssl_mutex_lock)( threading_mutex_t * ) = threading_mutex_fail;
int (*polarssl_mutex_unlock)( threading_mutex_t * ) = threading_mutex_fail;
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int threading_set_alt( int (*mutex_init)( threading_mutex_t * ),
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int (*mutex_free)( threading_mutex_t * ),
int (*mutex_lock)( threading_mutex_t * ),
int (*mutex_unlock)( threading_mutex_t * ) )
{
polarssl_mutex_init = mutex_init;
polarssl_mutex_free = mutex_free;
polarssl_mutex_lock = mutex_lock;
polarssl_mutex_unlock = mutex_unlock;
return( 0 );
}
#endif /* POLARSSL_THREADING_ALT_C */
#endif /* POLARSSL_THREADING_C */