faf6d4dc93
The earlier attempt at protecting these functions from
already freed memory worked just fine until the memory
was, in fact, reused by the OS. At that point, the ref
count would most likely fail an existing a test for 0.
So this commit will take control of the 'info' pointer
and force it to NULL when a reference count reaches 0.
Plus, since it makes little sense returning an address
that a caller already has, henceforth we will return a
reference count out of the 'ref' and 'unref functions.
Reference(s):
commit 74beff80ff
Signed-off-by: Jim Warner <james.warner@comcast.net>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
|
|
* libprocps - Library to read proc filesystem
|
|
*
|
|
* Copyright (C) 1995 Martin Schulze <joey@infodrom.north.de>
|
|
* Copyright (C) 1996 Charles Blake <cblake@bbn.com>
|
|
* Copyright (C) 2003 Albert Cahalan
|
|
* Copyright (C) 2015 Craig Small <csmall@enc.com.au>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef PROC_VMSTAT_H
|
|
#define PROC_VMSTAT_H
|
|
|
|
#include <proc/procps.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
enum vmstat_item {
|
|
PROCPS_VMSTAT_PGPGIN,
|
|
PROCPS_VMSTAT_PGPGOUT,
|
|
PROCPS_VMSTAT_PSWPIN,
|
|
PROCPS_VMSTAT_PSWPOUT
|
|
};
|
|
|
|
struct vmstat_result {
|
|
enum vmstat_item item;
|
|
unsigned long result;
|
|
struct vmstat_result *next;
|
|
};
|
|
|
|
struct procps_vmstat;
|
|
|
|
int procps_vmstat_new (struct procps_vmstat **info);
|
|
int procps_vmstat_read (struct procps_vmstat *info);
|
|
|
|
int procps_vmstat_ref (struct procps_vmstat *info);
|
|
int procps_vmstat_unref (struct procps_vmstat **info);
|
|
|
|
unsigned long procps_vmstat_get (struct procps_vmstat *info, enum vmstat_item item);
|
|
int procps_vmstat_get_chain (struct procps_vmstat *info, struct vmstat_result *item);
|
|
|
|
__END_DECLS
|
|
#endif
|