File: procmem.c

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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., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#include <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/procmem.h>

#include "glibtop_private.h"

static const unsigned long _glibtop_sysdeps_proc_mem =
(1L << GLIBTOP_PROC_MEM_SIZE) + (1L << GLIBTOP_PROC_MEM_RESIDENT) +
(1L << GLIBTOP_PROC_MEM_SHARE);

/* Init function. */

void
_glibtop_init_proc_mem_s (glibtop *server)
{
	server->sysdeps.proc_mem = _glibtop_sysdeps_proc_mem;
}

/* Provides detailed information about a process. */

void
glibtop_get_proc_mem_s (glibtop *server, glibtop_proc_mem *buf, pid_t pid)
{
	char buffer [BUFSIZ], *p;
	const size_t pagesize = get_page_size();

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

	if (proc_statm_to_buffer(buffer, sizeof buffer, pid))
		return;

	buf->size     = strtoull (buffer, &p, 0);
	buf->resident = strtoull (p, &p, 0);
	buf->share    = strtoull (p, &p, 0);

	buf->size     *= pagesize;
	buf->resident *= pagesize;
	buf->share    *= pagesize;

	/* dummy values */
	buf->vsize = buf->size;
	buf->rss_rlim = ~0;

	buf->flags |= _glibtop_sysdeps_proc_mem;
	buf->rss = buf->resident;
}