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/* $Id$ */
/* 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 Library 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public
License along with LibGTop; see the file COPYING.LIB. If not, write
to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <glibtop.h>
#include <glibtop/xmalloc.h>
#include <glibtop/proclist.h>
#include "kernel.h"
static const unsigned long _glibtop_sysdeps_proclist =
(1 << GLIBTOP_PROCLIST_TOTAL) + (1 << GLIBTOP_PROCLIST_NUMBER) +
(1 << GLIBTOP_PROCLIST_SIZE);
/* Init function. */
void
glibtop_init_proclist_s (glibtop *server)
{
server->sysdeps.proclist = _glibtop_sysdeps_proclist;
}
#define BLOCK_COUNT 256
#define BLOCK_SIZE (BLOCK_COUNT * sizeof (unsigned))
/* Fetch list of currently running processes.
*
* The interface of this function is a little bit different from the others:
* buf->flags is only set if the call succeeded, in this case pids_chain,
* a list of the pids of all currently running processes is returned,
* buf->number is the number of elements of this list and buf->size is
* the size of one single element (sizeof (unsigned)). The total size is
* stored in buf->total.
*
* The calling function has to free the memory to which a pointer is returned.
*
* On error, NULL is returned and buf->flags is zero. */
unsigned *
glibtop_get_proclist_s (glibtop *server, glibtop_proclist *buf,
int64_t which, int64_t arg)
{
union table tbl;
unsigned *pids_chain;
struct proclist_args args;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROCLIST, 0);
memset (buf, 0, sizeof (glibtop_proclist));
args.which = which;
args.arg = arg;
if (table (TABLE_PROCLIST, &tbl, &args))
glibtop_error_io_r (server, "table(TABLE_PROCLIST)");
buf->size = sizeof (unsigned);
buf->number = tbl.proclist.nr_tasks;
buf->total = buf->number * sizeof (unsigned);
pids_chain = glibtop_malloc_r (server, buf->total);
memcpy (pids_chain, tbl.proclist.pids, buf->total);
return pids_chain;
}
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