/* Copyright (C) 1998 Joshua Sled

   This file is part of LibGTop 1.0.

   Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 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/error.h>

#include <glibtop/mem.h>

#include <sys/types.h>

#include <sys/sysctl.h>

static const unsigned long _glibtop_sysdeps_mem =

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

(1L << GLIBTOP_MEM_FREE) + (1L << GLIBTOP_MEM_SHARED) +

(1L << GLIBTOP_MEM_BUFFER) + (1L << GLIBTOP_MEM_CACHED) +

(1L << GLIBTOP_MEM_USER);

/* these are for getting the memory statistics */

static int pagesize;

/* Init function. */

void

_glibtop_init_mem_s (glibtop *server)

{

	pagesize = getpagesize ();

	server->sysdeps.mem = _glibtop_sysdeps_mem;

}

static gulong mem_get_by_bytes (glibtop *server, const char *name) {

	gulong result = 0;

	size_t len = sizeof (result);

	if (sysctlbyname (name, &result, &len, NULL, 0)) {

		glibtop_warn_io_r (server, "sysctl (%s)", name);

	}

	return result;

}

static gulong mem_get_by_pages (glibtop *server, const char *name) {

	guint result = 0;

	size_t len = sizeof (result);

	if (sysctlbyname (name, &result, &len, NULL, 0)) {

		glibtop_warn_io_r (server, "sysctl (%s)", name);

	}

	return (gulong) result * pagesize;

}

void

glibtop_get_mem_s (glibtop *server, glibtop_mem *buf)

{

	gulong memtotal;

	gulong memactive;

	gulong meminactive;

	gulong memwired;

	gulong memcached;

	gulong membuffer;

	gulong memfree;

	memset (buf, 0, sizeof *buf);

	memtotal = mem_get_by_bytes (server, "hw.physmem");

	memactive = mem_get_by_pages (server, "vm.stats.vm.v_active_count");

	meminactive = mem_get_by_pages (server, "vm.stats.vm.v_inactive_count");

	memwired = mem_get_by_pages (server, "vm.stats.vm.v_wire_count");

	memcached = mem_get_by_pages (server, "vm.stats.vm.v_cache_count");

	membuffer = mem_get_by_bytes (server, "vfs.bufspace");

	memfree = mem_get_by_pages (server, "vm.stats.vm.v_free_count");

	buf->total = memtotal;

	buf->used = memtotal - memfree;

	buf->free = memfree;

	buf->shared = 0;

	buf->buffer = membuffer;

	buf->cached = memcached;

	buf->locked = 0;

	buf->user = memactive + memwired;

	buf->flags = _glibtop_sysdeps_mem;

}