/* Copyright (C) 1998-99 Martin Baulig

   This file is part of LibGTop 1.0.

   Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.

   LibGTop 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.

   LibGTop 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 LibGTop; see the file COPYING. If not, write to the

   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

   Boston, MA 02110-1301, USA.

*/

#include <config.h>

#include <glibtop.h>

#include <glibtop/error.h>

#include <glibtop/uptime.h>

#include <glibtop/cpu.h>

#include <sys/types.h>

#include <sys/sysctl.h>

static const unsigned long _glibtop_sysdeps_uptime =

(1L << GLIBTOP_UPTIME_UPTIME);

static const unsigned long _glibtop_sysdeps_idletime =

(1L << GLIBTOP_UPTIME_IDLETIME);

static const unsigned long _required_cpu_flags =

(1L << GLIBTOP_CPU_IDLE) +

(1L << GLIBTOP_CPU_FREQUENCY);

/* Init function. */

void

_glibtop_init_uptime_s (glibtop *server)

{

	server->sysdeps.uptime = _glibtop_sysdeps_uptime;

}

/* Provides uptime and idle time. */

void

glibtop_get_uptime_s (glibtop *server, glibtop_uptime *buf)

{

	time_t now;

	int mib[2];

	struct timeval boottime;

	size_t size;

	glibtop_cpu cpu;

	memset (buf, 0, sizeof (glibtop_uptime));

	mib[0] = CTL_KERN;

	mib[1] = KERN_BOOTTIME;

	size = sizeof(boottime);

	if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&

	    boottime.tv_sec != 0) {

		time(&now;;

		buf->uptime = now - boottime.tv_sec;

		buf->flags = _glibtop_sysdeps_uptime;

	}

	glibtop_get_cpu_s (server, &cpu);

	/* Make sure all required fields are present. */

	if ((cpu.flags & _required_cpu_flags) != _required_cpu_flags)

		return;

	/* Calculate values. */

	buf->idletime = (double) cpu.idle / (double) cpu.frequency;

	buf->idletime /= (double) (server->ncpu + 1);

	buf->flags |= _glibtop_sysdeps_idletime;

}