aab537bc13
An earlier approach to meminfo chaining, referenced in
the patch shown below, represents the first baby steps
toward the goal of some generalized approach with PIDs
processing. However, statically allocating a chain for
each task or thread is totally impractical. And, while
a single chain could serve all PIDs, that would mean a
separate call to our library for each running process.
This commit is intended as the next evolutionary step,
dynamically allocating some 'result' chains to contain
as many or as few 'items' as a caller wishes. In other
words, holding only those 'items' of current interest.
This is the kind of service useful for both top and ps
programs if we finally get around to /proc/<PID> data.
Reference(s):
commit c3fd7473c5
Signed-off-by: Jim Warner <james.warner@comcast.net>
90 lines
2.3 KiB
C
90 lines
2.3 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,
|
|
PROCPS_MEM_noop
|
|
};
|
|
|
|
struct procps_meminfo;
|
|
|
|
struct meminfo_result {
|
|
enum meminfo_item item;
|
|
unsigned long result;
|
|
struct meminfo_result *next;
|
|
};
|
|
|
|
struct meminfo_chain {
|
|
struct meminfo_result *head;
|
|
};
|
|
|
|
|
|
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_getchain (
|
|
struct procps_meminfo *info,
|
|
struct meminfo_result *these);
|
|
|
|
int procps_meminfo_chain_fill (
|
|
struct procps_meminfo *info,
|
|
struct meminfo_chain *chain);
|
|
|
|
struct meminfo_chain *procps_meminfo_chain_alloc (
|
|
struct procps_meminfo *info,
|
|
int maxitems,
|
|
enum meminfo_item *items);
|
|
|
|
__END_DECLS
|
|
#endif
|