contrib/cvs-1.12/lib/pagealign_alloc.h

   1 /* Memory allocation aligned to system page boundaries.
   2
   3    Copyright (C) 2005 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU General Public License as published
   7    by the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program 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    General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public
  16    License along with this program; if not, write to the Free Software
  17    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  18    USA.  */
  19
  20 #ifndef _PAGEALIGN_ALLOC_H
  21 # define _PAGEALIGN_ALLOC_H
  22
  23 # include <stddef.h>
  24
  25 /* Allocate a block of memory of SIZE bytes, aligned on a system page
  26    boundary.
  27    If SIZE is not a multiple of the system page size, it will be rounded up
  28    to the next multiple.
  29    Return a pointer to the start of the memory block. Upon allocation failure,
  30    return NULL and set errno.  */
  31 extern void *pagealign_alloc (size_t size);
  32
  33 /* Like pagealign_alloc, except it exits the program if the allocation
  34    fails.  */
  35 extern void *pagealign_xalloc (size_t size);
  36
  37 /* Free a memory block.
  38    PTR must be a non-NULL pointer returned by pagealign_alloc or
  39    pagealign_xalloc.  */
  40 extern void pagealign_free (void *ptr);
  41
  42 #endif /* _PAGEALIGN_ALLOC_H */