1  /* System-specific extensions of <sys/mman.h>, Hurd version.
       2     Copyright (C) 2022 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, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef _SYS_MMAN_H
      20  # error "Never include <bits/mman_ext.h> directly; use <sys/mman.h> instead."
      21  #endif
      22  
      23  #ifdef __USE_GNU
      24  # define SHM_ANON	((const char *) 1)
      25  
      26  # define MAP_32BIT	0x1000	/* Map in the lower 2 GB.  */
      27  # define MAP_EXCL	0x4000	/* With MAP_FIXED, don't replace existing mappings.  */
      28  
      29  # define MAP_TRYFIXED		(MAP_FIXED | MAP_EXCL)	/* BSD name.  */
      30  # define MAP_FIXED_NOREPLACE	(MAP_FIXED | MAP_EXCL)	/* Linux name.  */
      31  #endif /* __USE_GNU  */