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/*
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* Copyright (c) 2014-2017, Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* It looks like there is still no support for C11's threads.h.
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*
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* We implement the few features we actually need hoping that this file will
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* soon go away.
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*/
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#ifndef THREADS_H
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#define THREADS_H
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#include <pthread.h>
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#ifndef PTHREAD_MUTEX_NORMAL
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# define PTHREAD_MUTEX_NORMAL PTHREAD_MUTEX_TIMED_NP
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#endif
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#include <stdint.h>
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#include <stdlib.h>
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enum {
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thrd_success = 1,
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thrd_error
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};
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struct pt_thread {
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pthread_t thread;
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};
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typedef struct pt_thread thrd_t;
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typedef int (*thrd_start_t)(void *);
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struct thrd_args {
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thrd_start_t fun;
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void *arg;
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};
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static void *thrd_routine(void *arg)
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{
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struct thrd_args *args;
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int result;
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args = arg;
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if (!args)
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return (void *) (intptr_t) -1;
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result = -1;
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if (args->fun)
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result = args->fun(args->arg);
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free(args);
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return (void *) (intptr_t) result;
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}
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static inline int thrd_create(thrd_t *thrd, thrd_start_t fun, void *arg)
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{
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struct thrd_args *args;
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int errcode;
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if (!thrd || !fun)
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return thrd_error;
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args = malloc(sizeof(*args));
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if (!args)
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return thrd_error;
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args->fun = fun;
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args->arg = arg;
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errcode = pthread_create(&thrd->thread, NULL, thrd_routine, args);
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if (errcode) {
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free(args);
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return thrd_error;
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}
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return thrd_success;
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}
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static inline int thrd_join(thrd_t *thrd, int *res)
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{
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void *result;
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int errcode;
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if (!thrd)
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return thrd_error;
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errcode = pthread_join(thrd->thread, &result);
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if (errcode)
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return thrd_error;
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if (res)
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*res = (int) (intptr_t) result;
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return thrd_success;
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}
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struct pt_mutex {
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pthread_mutex_t mutex;
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};
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typedef struct pt_mutex mtx_t;
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enum {
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mtx_plain = PTHREAD_MUTEX_NORMAL
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};
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static inline int mtx_init(mtx_t *mtx, int type)
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{
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int errcode;
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if (!mtx || type != mtx_plain)
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return thrd_error;
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errcode = pthread_mutex_init(&mtx->mutex, NULL);
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if (errcode)
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return thrd_error;
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return thrd_success;
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}
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static inline void mtx_destroy(mtx_t *mtx)
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{
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if (mtx)
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(void) pthread_mutex_destroy(&mtx->mutex);
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}
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static inline int mtx_lock(mtx_t *mtx)
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{
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int errcode;
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if (!mtx)
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return thrd_error;
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errcode = pthread_mutex_lock(&mtx->mutex);
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if (errcode)
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return thrd_error;
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return thrd_success;
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}
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static inline int mtx_unlock(mtx_t *mtx)
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{
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int errcode;
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if (!mtx)
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return thrd_error;
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errcode = pthread_mutex_unlock(&mtx->mutex);
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if (errcode)
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return thrd_error;
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return thrd_success;
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}
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struct pt_cond {
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pthread_cond_t cond;
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};
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typedef struct pt_cond cnd_t;
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static inline int cnd_init(cnd_t *cnd)
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{
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int errcode;
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if (!cnd)
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return thrd_error;
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errcode = pthread_cond_init(&cnd->cond, NULL);
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if (errcode)
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return thrd_error;
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return thrd_success;
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}
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static inline int cnd_destroy(cnd_t *cnd)
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{
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int errcode;
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if (!cnd)
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return thrd_error;
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errcode = pthread_cond_destroy(&cnd->cond);
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if (errcode)
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return thrd_error;
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return thrd_success;
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}
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static inline int cnd_signal(cnd_t *cnd)
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{
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int errcode;
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if (!cnd)
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return thrd_error;
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errcode = pthread_cond_signal(&cnd->cond);
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if (errcode)
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return thrd_error;
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return thrd_success;
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}
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static inline int cnd_broadcast(cnd_t *cnd)
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{
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int errcode;
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if (!cnd)
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return thrd_error;
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errcode = pthread_cond_broadcast(&cnd->cond);
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if (errcode)
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return thrd_error;
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return thrd_success;
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}
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static inline int cnd_wait(cnd_t *cnd, mtx_t *mtx)
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{
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int errcode;
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if (!cnd || !mtx)
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return thrd_error;
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errcode = pthread_cond_wait(&cnd->cond, &mtx->mutex);
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if (errcode)
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return thrd_error;
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return thrd_success;
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}
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#endif /* THREADS_H */
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