procmem.c

来自「linux 操作系统下对系统资源监控程序的编写」· C语言 代码 · 共 64 行

/* $Id: procmem.c,v 1.13 2003/10/19 16:55:56 carlos Exp $ */

/* Copyright (C) 1998-99 Martin Baulig
   This file is part of LibGTop 1.0.

   Contributed by Martin Baulig <[e-mail]>, 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/procmem.h>

#include <glibtop_suid.h>

static const unsigned long _glibtop_sysdeps_proc_mem =
(1 << GLIBTOP_PROC_MEM_SIZE) + (1 << GLIBTOP_PROC_MEM_RSS) +
(1 << GLIBTOP_PROC_MEM_RSS_RLIM);

/* Provides detailed information about a process. */

void
glibtop_get_proc_mem_p (glibtop *server, glibtop_proc_mem *buf,
			pid_t pid)
{
	struct proc *pp;

	glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_PROC_MEM), 0);

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

	/* Read process table from kernel. */	

	_glibtop_read_proc_table (server);

	/* Find the pid in the process table. */

	pp = _glibtop_find_pid (server, pid);

	if (pp == NULL)	return;

	/* Fill in data fields. */

	buf->size = (pp)->p_tsize + (pp)->p_dsize + (pp)->p_ssize;

	buf->rss = pp->p_rssize;
	buf->rss_rlim = pp->p_maxrss;

	buf->flags = _glibtop_sysdeps_proc_mem;
}