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01: /* Calls to enable and disable swapping on specified locations.  Linux version.
02:    Copyright (C) 1996, 1998, 1999, 2010 Free Software Foundation, Inc.
03:    This file is part of the GNU C Library.
04: 
05:    The GNU C Library is free software; you can redistribute it and/or
06:    modify it under the terms of the GNU Lesser General Public
07:    License as published by the Free Software Foundation; either
08:    version 2.1 of the License, or (at your option) any later version.
09: 
10:    The GNU C Library is distributed in the hope that it will be useful,
11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13:    Lesser General Public License for more details.
14: 
15:    You should have received a copy of the GNU Lesser General Public
16:    License along with the GNU C Library; if not, write to the Free
17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18:    02111-1307 USA.  */
19: 
20: #ifndef _SYS_SWAP_H
21: 
22: #define _SYS_SWAP_H     1
23: #include <features.h>
24: 
25: /* The swap priority is encoded as:
26:    (prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK
27: */
28: #define SWAP_FLAG_PREFER        0x8000  /* Set if swap priority is specified. */
29: #define SWAP_FLAG_PRIO_MASK     0x7fff
30: #define SWAP_FLAG_PRIO_SHIFT    0
31: #define SWAP_FLAG_DISCARD       0x10000 /* Discard swap cluster after use.  */
32: 
33: __BEGIN_DECLS
34: 
35: /* Make the block special device PATH available to the system for swapping.
36:    This call is restricted to the super-user.  */
37: extern int swapon (__const char *__path, int __flags) __THROW;
38: 
39: /* Stop using block special device PATH for swapping.  */
40: extern int swapoff (__const char *__path) __THROW;
41: 
42: __END_DECLS
43: 
44: #endif /* _SYS_SWAP_H */
45: 

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