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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* $Id$ */
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, March 1999.
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <glibtop.h>
#include <glibtop/loadavg.h>
#ifdef HAVE_GETLOADAVG
#include <sys/loadavg.h>
#else
#include <assert.h>
#include <sys/param.h>
#include <kstat.h>
#endif
static const unsigned long _glibtop_sysdeps_loadavg =
(1L << GLIBTOP_LOADAVG_LOADAVG);
/* Init function. */
int
glibtop_init_loadavg_s (glibtop *server)
{
server->sysdeps.loadavg = _glibtop_sysdeps_loadavg;
return 0;
}
/* Provides load average. */
int
glibtop_get_loadavg_s (glibtop *server, glibtop_loadavg *buf)
{
#ifndef HAVE_GETLOADAVG
kstat_ctl_t *kc;
kstat_t *ksp;
int i;
static char *avestrings[] = { "avenrun_1min",
"avenrun_5min",
"avenrun_15min" };
#endif
memset (buf, 0, sizeof (glibtop_loadavg));
#ifdef HAVE_GETLOADAVG
if (getloadavg (buf->loadavg, 3) < 0)
return -GLIBTOP_ERROR_INCOMPATIBLE_KERNEL;
#else
if(!(kc = server->_priv->machine.kc))
return -GLIBTOP_ERROR_INCOMPATIBLE_KERNEL;
switch(kstat_chain_update(kc)) {
case -1: assert(0); /* Debugging, shouldn't happen */
case 0: break;
default: glibtop_get_kstats(server);
}
if(!(ksp = server->_priv->machine.system))
return -GLIBTOP_ERROR_INCOMPATIBLE_KERNEL;
if(kstat_read(kc, ksp, NULL) < 0)
return -GLIBTOP_ERROR_INCOMPATIBLE_KERNEL;
for(i = 0; i < 3; ++i) { /* Do we have a countof macro? */
kstat_named_t *kn;
kn = (kstat_named_t *)kstat_data_lookup(ksp, avestrings[i]);
if(kn)
buf->loadavg[i] = (double)kn->value.ul / FSCALE;
}
#endif
buf->flags = _glibtop_sysdeps_loadavg;
return 0;
}
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