/* Copyright (C) 2017 Robert Roth

   This file is part of LibGTop.

   Contributed by Robert Roth <robert.roth.off@gmail.com>, February 2017.

   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., 51 Franklin Street, Fifth Floor,

   Boston, MA 02110-1301, USA.

*/

#ifndef __GLIBTOP_PROCIO_H__

#define __GLIBTOP_PROCIO_H__

#include <glibtop.h>

#include <glibtop/global.h>

G_BEGIN_DECLS

#define GLIBTOP_PROC_IO_DISK_RCHAR	0

#define GLIBTOP_PROC_IO_DISK_WCHAR	1

#define GLIBTOP_PROC_IO_DISK_RBYTES	2

#define GLIBTOP_PROC_IO_DISK_WBYTES	3

#define GLIBTOP_MAX_PROC_IO		3

typedef struct _glibtop_proc_io	glibtop_proc_io;

/* Time section */

/**

 * glibtop_proc_io:

 * @disk_rchar: The number of bytes which this task has caused to be read from storage. This

 * is simply the sum of bytes which this process passed to read() and pread(), also including tty IO,

 * and it is unaffected by whether or not actual physical disk IO was required.

 * @disk_wchar: The number of bytes which this task has caused, or shall cause to be written

 * to disk. Similar caveats apply here as with rchar.

 * @disk_rbytes: Attempt to count the number of bytes which this process really did cause to

 * be fetched from the storage layer. Done at the submit_bio() level, so it is

 * accurate for block-backed filesystems.

 * @disk_wbytes: Attempt to count the number of bytes which this process caused to be sent to

 * the storage layer. This is done at page-dirtying time.

 *

 * Process disk io data filled by glibtop_get_proc_io().

 *

 */

struct _glibtop_proc_io

{

	guint64	flags;

	guint64 disk_rchar;

	guint64 disk_wchar;

	guint64 disk_rbytes;

	guint64 disk_wbytes;

    /* reserved for future extensions, e.g. per-process netio */

    guint64 reserved[10];

};

void glibtop_get_proc_io (glibtop_proc_io *buf, pid_t pid);

#if GLIBTOP_SUID_PROC_IO

#define glibtop_get_proc_io_r	glibtop_get_proc_io_p

#else

#define glibtop_get_proc_io_r	glibtop_get_proc_io_s

#endif

void glibtop_get_proc_io_l (glibtop *server, glibtop_proc_io *buf, pid_t pid);

#if GLIBTOP_SUID_PROC_IO

void _glibtop_init_proc_io_p (glibtop *server);

void glibtop_get_proc_io_p (glibtop *server, glibtop_proc_io *buf, pid_t pid);

#else

void _glibtop_init_proc_io_s (glibtop *server);

void glibtop_get_proc_io_s (glibtop *server, glibtop_proc_io *buf, pid_t pid);

#endif

G_END_DECLS

#endif