PyFCGI/include/stats.h

/*
 * Copyright (C) 2019 Weber Yann
 * 
 * This file is part of PyFCGI.
 * 
 * PyFCGI is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 * 
 * PyFCGI 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with PyFCGI.  If not, see <http://www.gnu.org/licenses/>.
 */
/**@file stats.h
 * @ingroup monitoring */
#ifndef _STATS__H___
#define _STATS__H___
#include "config.h"

#include <fcgiapp.h>

#include <signal.h>
#include <string.h>

typedef struct pyfcgi_stats_s pyfcgi_stats_t;

#include "conf.h"
#include "logger.h"

struct pyfcgi_stats_s
{
	/**@brief Request per seconds on 15 minutes */
	int reqs[900];
	/**@brief Current request index */
	int cur_req;

	/**@brief Repeating 1s timer sending SIGALRM */
	timer_t timerid;

	/**@brief Old SIGALRM handler */
	struct sigaction oldact;
};

/**@brief Starts collecting statistics
 *
 * Set an handler for SIGALRM and set a repeating alarm each seconds
 * @warning designed to be called from monitor server process
 * @return -1 on error else 0
 */
int pyfcgi_stats_init();

/**@brief SIGALRM signal handler
 * @param int signum
 */
void pyfcgi_stats_collector(int);

#endif