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>
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*
|
|
* meminfo - Memory statistics part of procps
|
|
*
|
|
* Copyright (C) 1992-1998 by Michael K. Johnson <johnsonm@redhat.com>
|
|
* Copyright (C) 1998-2003 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_MEMINFO_H
|
|
#define PROC_MEMINFO_H
|
|
|
|
#include <proc/procps.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
enum meminfo_item {
|
|
PROCPS_MEMHI_FREE,
|
|
PROCPS_MEMHI_TOTAL,
|
|
PROCPS_MEMHI_USED,
|
|
PROCPS_MEMLO_FREE,
|
|
PROCPS_MEMLO_TOTAL,
|
|
PROCPS_MEMLO_USED,
|
|
PROCPS_MEM_ACTIVE,
|
|
PROCPS_MEM_AVAILABLE,
|
|
PROCPS_MEM_BUFFERS,
|
|
PROCPS_MEM_CACHED,
|
|
PROCPS_MEM_FREE,
|
|
PROCPS_MEM_INACTIVE,
|
|
PROCPS_MEM_SHARED,
|
|
PROCPS_MEM_TOTAL,
|
|
PROCPS_MEM_USED,
|
|
PROCPS_SWAP_FREE,
|
|
PROCPS_SWAP_TOTAL,
|
|
PROCPS_SWAP_USED
|
|
};
|
|
|
|
struct meminfo_result {
|
|
enum meminfo_item item;
|
|
unsigned long result;
|
|
struct meminfo_result *next;
|
|
};
|
|
|
|
struct procps_meminfo;
|
|
|
|
int procps_meminfo_new (struct procps_meminfo **info);
|
|
int procps_meminfo_read (struct procps_meminfo *info);
|
|
|
|
int procps_meminfo_ref (struct procps_meminfo *info);
|
|
int procps_meminfo_unref (struct procps_meminfo **info);
|
|
|
|
unsigned long procps_meminfo_get (struct procps_meminfo *info, enum meminfo_item item);
|
|
int procps_meminfo_get_chain (struct procps_meminfo *info, struct meminfo_result *item);
|
|
|
|
__END_DECLS
|
|
#endif
|
|
|