mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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134 lines
4.2 KiB
C
134 lines
4.2 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: GPL-2.0
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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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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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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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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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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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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((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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((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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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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}
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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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#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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}
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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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#endif /* MBEDTLS_THREADING_C */
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