text: /* Copyright (C) 2011 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, write to the Free
     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
     02111-1307 USA.  */
  
  #ifndef _SYS_MMAN_H
  # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
  #endif
  
  /* The following definitions basically come from the kernel headers.
     But the kernel header is not namespace clean.  */
  
  
  /* Protections are chosen from these bits, OR'd together.  The
     implementation does not necessarily support PROT_EXEC or PROT_WRITE
     without PROT_READ.  The only guarantees are that no writing will be
     allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
  
  #define PROT_READ	0x1		/* Page can be read.  */
  #define PROT_WRITE	0x2		/* Page can be written.  */
  #define PROT_EXEC	0x4		/* Page can be executed.  */
  #define PROT_NONE	0x0		/* Page can not be accessed.  */
  #define PROT_GROWSDOWN	0x01000000	/* Extend change to start of
  					   growsdown vma (mprotect only).  */
  #define PROT_GROWSUP	0x02000000	/* Extend change to start of
  					   growsup vma (mprotect only).  */
  
  /* Sharing types (must choose one and only one of these).  */
  #define MAP_SHARED	0x01		/* Share changes.  */
  #define MAP_PRIVATE	0x02		/* Changes are private.  */
  #ifdef __USE_MISC
  # define MAP_TYPE	0x0f		/* Mask for type of mapping.  */
  #endif
  
  /* Other flags.  */
  #define MAP_FIXED	0x10		/* Interpret addr exactly.  */
  #ifdef __USE_MISC
  # define MAP_FILE	0
  # define MAP_ANONYMOUS	0x20		/* Don't use a file.  */
  # define MAP_ANON	MAP_ANONYMOUS
  #endif
  
  #ifdef __USE_MISC
  /* These are Linux-specific.  */
  # define MAP_NONBLOCK	0x00080		/* Do not block on IO.  */
  # define MAP_GROWSDOWN	0x00100		/* Stack-like segment.  */
  # define MAP_STACK	MAP_GROWSDOWN	/* Provide convenience alias.  */
  # define MAP_LOCKED	0x00200		/* Lock the mapping.  */
  # define MAP_NORESERVE	0x00400		/* Don't check for reservations.  */
  # define MAP_DENYWRITE	0x00800		/* ETXTBSY */
  # define MAP_EXECUTABLE	0x01000		/* Mark it as an executable.  */
  # define MAP_POPULATE	0x00040		/* Populate (prefault) pagetables.  */
  # define MAP_HUGETLB	0x04000		/* Create huge page mapping.  */
  #endif
  
  /* Flags to `msync'.  */
  #define MS_ASYNC	1		/* Sync memory asynchronously.  */
  #define MS_SYNC		4		/* Synchronous memory sync.  */
  #define MS_INVALIDATE	2		/* Invalidate the caches.  */
  
  /* Flags for `mlockall'.  */
  #define MCL_CURRENT	1		/* Lock all currently mapped pages.  */
  #define MCL_FUTURE	2		/* Lock all additions to address
  					   space.  */
  
  /* Flags for `mremap'.  */
  #ifdef __USE_GNU
  # define MREMAP_MAYMOVE	1
  # define MREMAP_FIXED	2
  #endif
  
  /* Advice to `madvise'.  */
  #ifdef __USE_BSD
  # define MADV_NORMAL	  0	/* No further special treatment.  */
  # define MADV_RANDOM	  1	/* Expect random page references.  */
  # define MADV_SEQUENTIAL  2	/* Expect sequential page references.  */
  # define MADV_WILLNEED	  3	/* Will need these pages.  */
  # define MADV_DONTNEED	  4	/* Don't need these pages.  */
  # define MADV_REMOVE	  9	/* Remove these pages and resources.  */
  # define MADV_DONTFORK	  10	/* Do not inherit across fork.  */
  # define MADV_DOFORK	  11	/* Do inherit across fork.  */
  # define MADV_MERGEABLE	  12	/* KSM may merge identical pages.  */
  # define MADV_UNMERGEABLE 13	/* KSM may not merge identical pages.  */
  # define MADV_HUGEPAGE	  14	/* Worth backing with hugepages.  */
  # define MADV_NOHUGEPAGE  15	/* Not worth backing with hugepages.  */
  # define MADV_HWPOISON	  100	/* Poison a page for testing.  */
  #endif
  
  /* The POSIX people had to invent similar names for the same things.  */
  #ifdef __USE_XOPEN2K
  # define POSIX_MADV_NORMAL	0 /* No further special treatment.  */
  # define POSIX_MADV_RANDOM	1 /* Expect random page references.  */
  # define POSIX_MADV_SEQUENTIAL	2 /* Expect sequential page references.  */
  # define POSIX_MADV_WILLNEED	3 /* Will need these pages.  */
  # define POSIX_MADV_DONTNEED	4 /* Don't need these pages.  */
  #endif
  