/* Definitions for BSD-style memory management.
       Copyright (C) 1994-2000, 2003, 2004, 2005 Free Software Foundation, Inc.
       This file is part of the GNU C Library.

       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
    #define _SYS_MMAN_H 1

    #include <features.h>
    #include <bits/types.h>
    #define __need_size_t
    #include <stddef.h>

    #ifndef __off_t_defined
    # ifndef __USE_FILE_OFFSET64
    typedef __off_t off_t;
    # else
    typedef __off64_t off_t;
    # endif
    # define __off_t_defined
    #endif

    #ifndef __mode_t_defined
    typedef __mode_t mode_t;
    # define __mode_t_defined
    #endif

    #include <bits/mman.h>

    /* Return value of `mmap' in case of an error.  */
    #define MAP_FAILED  ((void *) -1)

    __BEGIN_DECLS
    /* Map addresses starting near ADDR and extending for LEN bytes.  from
       OFFSET into the file FD describes according to PROT and FLAGS.  If ADDR
       is nonzero, it is the desired mapping address.  If the MAP_FIXED bit is
       set in FLAGS, the mapping will be at ADDR exactly (which must be
       page-aligned); otherwise the system chooses a convenient nearby address.
       The return value is the actual mapping address chosen or MAP_FAILED
       for errors (in which case `errno' is set).  A successful `mmap' call
       deallocates any previous mapping for the affected region.  */

    #ifndef __USE_FILE_OFFSET64
    extern void *mmap (void *__addr, size_t __len, int __prot,
               int __flags, int __fd, __off_t __offset) __THROW;
    #else
    # ifdef __REDIRECT_NTH
    extern void * __REDIRECT_NTH (mmap,
                      (void *__addr, size_t __len, int __prot,
                       int __flags, int __fd, __off64_t __offset),
                      mmap64);
    # else
    #  define mmap mmap64
    # endif
    #endif
    #ifdef __USE_LARGEFILE64
    extern void *mmap64 (void *__addr, size_t __len, int __prot,
                 int __flags, int __fd, __off64_t __offset) __THROW;
    #endif

    /* Deallocate any mapping for the region starting at ADDR and extending LEN
       bytes.  Returns 0 if successful, -1 for errors (and sets errno).  */
    extern int munmap (void *__addr, size_t __len) __THROW;

    /* Change the memory protection of the region starting at ADDR and
       extending LEN bytes to PROT.  Returns 0 if successful, -1 for errors
       (and sets errno).  */
    extern int mprotect (void *__addr, size_t __len, int __prot) __THROW;

    /* Synchronize the region starting at ADDR and extending LEN bytes with the
       file it maps.  Filesystem operations on a file being mapped are
       unpredictable before this is done.  Flags are from the MS_* set.

       This function is a cancellation point and therefore not marked with
       __THROW.  */
    extern int msync (void *__addr, size_t __len, int __flags);

    #ifdef __USE_BSD
    /* Advise the system about particular usage patterns the program follows
       for the region starting at ADDR and extending LEN bytes.  */
    extern int madvise (void *__addr, size_t __len, int __advice) __THROW;
    #endif
    #ifdef __USE_XOPEN2K
    /* This is the POSIX name for this function.  */
    extern int posix_madvise (void *__addr, size_t __len, int __advice) __THROW;
    #endif

    /* Guarantee all whole pages mapped by the range [ADDR,ADDR+LEN) to
       be memory resident.  */
    extern int mlock (__const void *__addr, size_t __len) __THROW;

    /* Unlock whole pages previously mapped by the range [ADDR,ADDR+LEN).  */
    extern int munlock (__const void *__addr, size_t __len) __THROW;

    /* Cause all currently mapped pages of the process to be memory resident
       until unlocked by a call to the `munlockall', until the process exits,
       or until the process calls `execve'.  */
    extern int mlockall (int __flags) __THROW;

    /* All currently mapped pages of the process' address space become
       unlocked.  */
    extern int munlockall (void) __THROW;

    #ifdef __USE_MISC
    /* mincore returns the memory residency status of the pages in the
       current process's address space specified by [start, start + len).
       The status is returned in a vector of bytes.  The least significant
       bit of each byte is 1 if the referenced page is in memory, otherwise
       it is zero.  */
    extern int mincore (void *__start, size_t __len, unsigned char *__vec)
         __THROW;
    #endif

    #ifdef __USE_GNU
    /* Remap pages mapped by the range [ADDR,ADDR+OLD_LEN) to new length
       NEW_LEN.  If MREMAP_MAYMOVE is set in FLAGS the returned address
       may differ from ADDR.  If MREMAP_FIXED is set in FLAGS the function
       takes another paramter which is a fixed address at which the block
       resides after a successful call.  */
    extern void *mremap (void *__addr, size_t __old_len, size_t __new_len,
                 int __flags, ...) __THROW;

    /* Remap arbitrary pages of a shared backing store within an existing
       VMA.  */
    extern int remap_file_pages (void *__start, size_t __size, int __prot,
                     size_t __pgoff, int __flags) __THROW;
    #endif


    /* Open shared memory segment.  */
    extern int shm_open (__const char *__name, int __oflag, mode_t __mode);

    /* Remove shared memory segment.  */
    extern int shm_unlink (__const char *__name);

    __END_DECLS

    #endif  /* sys/mman.h */