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/* 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/mem.h>
#include <glibtop_suid.h>
static const unsigned long _glibtop_sysdeps_mem =
(1 << GLIBTOP_MEM_TOTAL) + (1 << GLIBTOP_MEM_USED) +
(1 << GLIBTOP_MEM_FREE) + (1 << GLIBTOP_MEM_LOCKED);
/* define pagetok in terms of pageshift */
#define pagetok(size) ((size) << server->machine.pageshift)
/* Provides information about memory usage. */
void
glibtop_get_mem_p (glibtop *server, glibtop_mem *buf)
{
glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_MEM), 0);
memset (buf, 0, sizeof (glibtop_mem));
/* !!! THE FOLLOWING CODE RUNS SGID KMEM - CHANGE WITH CAUTION !!! */
glibtop_suid_enter (server);
/* get the array of physpage descriptors */
(void) _glibtop_getkval (server, server->machine.pages,
(int *) server->machine.physpage,
server->machine.bytesize,
"array _page");
glibtop_suid_leave (server);
/* !!! END OF SGID KMEM PART !!! */
{ /* sum memory statistics */
register struct page *pp;
register int cnt;
register int inuse;
register int free;
register int locked;
/* bop thru the array counting page types */
pp = server->machine.physpage;
inuse = free = locked = 0;
for (cnt = server->machine.count; --cnt >= 0; pp++) {
if (pp->p_free)
free++;
else if (pp->p_lock || pp->p_keepcnt > 0)
locked++;
else
inuse++;
}
/* convert memory stats to Kbytes */
buf->total = pagetok (inuse + free);
buf->used = pagetok (inuse);
buf->free = pagetok (free);
buf->locked = pagetok (locked);
buf->flags = _glibtop_sysdeps_mem;
}
}
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