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

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

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This file is part of the GNU C Library.

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The GNU C Library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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The GNU C Library is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with the GNU C Library; if not, see

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

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#ifndef _SYS_SWAP_H

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#define _SYS_SWAP_H 1

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#include <features.h>

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/* The swap priority is encoded as:

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(prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK

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*/

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

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#define SWAP_FLAG_PRIO_MASK 0x7fff

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#define SWAP_FLAG_PRIO_SHIFT 0

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

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__BEGIN_DECLS

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

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

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

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

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extern int swapoff (const char *__path) __THROW;

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__END_DECLS

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#endif /* _SYS_SWAP_H */

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