/* Calls to enable and disable swapping on specified locations.  Linux version.

   Copyright (C) 1996-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C 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.

   The GNU C 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 the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _SYS_SWAP_H

#define _SYS_SWAP_H	1

#include <features.h>

/* The swap priority is encoded as:

   (prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK

*/

#define	SWAP_FLAG_PREFER	0x8000	/* Set if swap priority is specified. */

#define	SWAP_FLAG_PRIO_MASK	0x7fff

#define	SWAP_FLAG_PRIO_SHIFT	0

#define SWAP_FLAG_DISCARD	0x10000	/* Discard swap cluster after use.  */

__BEGIN_DECLS

/* Make the block special device PATH available to the system for swapping.

   This call is restricted to the super-user.  */

extern int swapon (const char *__path, int __flags) __THROW;

/* Stop using block special device PATH for swapping.  */

extern int swapoff (const char *__path) __THROW;

__END_DECLS

#endif /* _SYS_SWAP_H */