sysdeps/unix/sysv/linux/sys/swap.h

   1 /* Calls to enable and disable swapping on specified locations.  Linux version.
   2    Copyright (C) 1996, 1998, 1999 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  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
  32 __BEGIN_DECLS
  33
  34 /* Make the block special device PATH available to the system for swapping.
  35    This call is restricted to the super-user.  */
  36 extern int swapon (__const char *__path, int __flags) __THROW;
  37
  38 /* Stop using block special device PATH for swapping.  */
  39 extern int swapoff (__const char *__path) __THROW;
  40
  41 __END_DECLS
  42
  43 #endif /* _SYS_SWAP_H */