/* 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 <unistd.h>

#include <sys/vminfo.h>

#include <glibtop.h>

#include <glibtop/error.h>

#include <glibtop/mem.h>

static const unsigned long _glibtop_sysdeps_mem =

(1 << GLIBTOP_MEM_TOTAL) + (1 << GLIBTOP_MEM_USED) +

(1 << GLIBTOP_MEM_FREE) + (1 << GLIBTOP_MEM_LOCKED);

/* Init function. */

void

_glibtop_init_mem_s (glibtop *server)

{

	server->sysdeps.mem = _glibtop_sysdeps_mem;

}

/* Provides information about memory usage. */

void

glibtop_get_mem_s (glibtop *server, glibtop_mem *buf)

{

	struct vminfo vminfo;

	int pagesize;

	int result;

	glibtop_init_s (&server, (1L << GLIBTOP_SYSDEPS_MEM), 0);

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

	pagesize = sysconf(_SC_PAGESIZE);

#ifdef HAVE_VMGETINFO

	result = vmgetinfo((void*)&vminfo, VMINFO, sizeof(vminfo));

#else

	result = _glibtop_vmgetinfo((void*)&vminfo, VMINFO, sizeof(vminfo));

#endif

	if (result == -1)

	{

		glibtop_error_io_r (server, "Cannot read vminfo");

		return;

	}

	buf->total = vminfo.memsizepgs * pagesize;

	buf->used = (vminfo.numwseguse + vminfo.numpseguse +

		     vminfo.numclseguse) * pagesize;

	buf->free = vminfo.numfrb * pagesize;

	buf->locked = (vminfo.numwsegpin + vminfo.numpsegpin +

		       vminfo.numclsegpin) * pagesize;

	buf->flags = _glibtop_sysdeps_mem;

}