/* 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/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;

	}

}