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/* Routines to get global host info.
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
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, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <hurd.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "ps.h"
#include "common.h"
/* ---------------------------------------------------------------- */
/*
The Basic & Sched info types are pretty static, so we cache them, but load
info is dynamic so we don't cache that.
See <mach/host_info.h> for information on the data types these routines
return.
*/
/* Return the current host port. */
host_t
ps_get_host()
{
static host_t host = MACH_PORT_NULL;
if (host == MACH_PORT_NULL)
host = mach_host_self();
return host;
}
/* Return a pointer to basic info about the current host in INFO. Since
this is static global information we just use a static buffer. If a
system error occurs, the error code is returned, otherwise 0. */
error_t
ps_host_basic_info(host_basic_info_t *info)
{
bool initialized = FALSE;
static host_basic_info_data_t buf;
if (!initialized)
{
int size = sizeof(buf);
error_t err = host_info(ps_get_host(), HOST_BASIC_INFO,
(host_info_t) &buf, &size);
if (err)
return err;
initialized = TRUE;
}
*info = &buf;
return 0;
}
/* Return a pointer to scheduling info about the current host in INFO.
Since this is static global information we just use a static buffer. If a
system error occurs, the error code is returned, otherwise 0. */
error_t
ps_host_sched_info(host_sched_info_t *info)
{
bool initialized = FALSE;
static host_sched_info_data_t buf;
if (!initialized)
{
int size = sizeof(buf);
error_t err = host_info(ps_get_host(), HOST_SCHED_INFO,
(host_info_t) &buf, &size);
if (err)
return err;
initialized = TRUE;
}
*info = &buf;
return 0;
}
/* Return a pointer to load info about the current host in INFO. Since
this is global information we just use a static buffer (if someone desires
to keep old load info, they should copy the buffer we return a pointer
to). If a system error occurs, the error code is returned, otherwise 0. */
error_t
ps_host_load_info(host_load_info_t *info)
{
static host_load_info_data_t buf;
int size = sizeof(buf);
error_t err = host_info(ps_get_host(), HOST_LOAD_INFO,
(host_info_t) &buf, &size);
if (err)
return err;
*info = &buf;
return 0;
}
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