/*
 * Copyright (C) 2013-2021 Canonical, Ltd.
 *
 * 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.
 *
 * Author: Colin Ian King <colin.king@canonical.com>
 */
#ifndef __CPUSTAT_H__
#define __CPUSTAT_H__

#define _GNU_SOURCE

#include <stdint.h>

#include "list.h"
#include "proc.h"
#include "json.h"

/* cpu usage information per process */
typedef struct {
	proc_info_t	*proc;		/* Proc specific info */
	uint64_t	utime;		/* User time quantum */
	uint64_t	stime;		/* System time quantum */
	uint64_t	ttime;		/* Total time */
	uint64_t	minor_fault;	/* Minor page faults */
	uint64_t	major_fault;	/* Minor page faults */
	struct timeval	whence;		/* When sample was taken */
	double		duration;	/* Duration between old and new samples */
} cpustat_info_t;

extern int cpustat_dump_diff(json_object *json_obj, const double duration);
extern int cpustat_get_all_pids(const list_t *pids, proc_state state);
extern int cpustat_get_by_proc(proc_info_t *proc, proc_state state);
extern int pagefault_dump_diff(json_object *j_tests, const double duration);
extern void cpustat_init(void);
extern void cpustat_cleanup(void);

#endif
