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/**
* Thread headers
*
* @package vzlogger
* @copyright Copyright (c) 2011 - 2023, The volkszaehler.org project
* @license http://www.gnu.org/licenses/gpl.txt GNU Public License
* @author Steffen Vogel <info@steffenvogel.de>
*/
/*
* This file is part of volkzaehler.org
*
* volkzaehler.org 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 3 of the License, or
* any later version.
*
* volkzaehler.org 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 volkszaehler.org. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _THREADS_H_
#define _THREADS_H_
#include <pthread.h>
#include <unistd.h>
void *logging_thread(void *arg);
void *reading_thread(void *arg);
// vzlogger uses pthread_cancel() to stop threads, which is not safe for C++ code that might invoke
// destructors, this macro is to be placed around any code that your meter spends significant
// amounts of time in, but which may not contain C++ code that might destroy objects.
// See https://blog.memzero.de/pthread-cancel-noexcept/ for details.
#define CANCELLABLE(...) \
do { \
int oldstate; \
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate); \
__VA_ARGS__; \
pthread_setcancelstate(oldstate, NULL); \
} while (0)
inline void _safe_to_cancel() { CANCELLABLE(pthread_testcancel()); }
inline void _cancellable_sleep(int seconds) { CANCELLABLE(sleep(seconds)); }
#endif /* _THREADS_H_ */
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