#ifndef _SYS_MMAN_H
#define	_SYS_MMAN_H	1

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

#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
extern void * __REDIRECT (mmap,
			  (void *__addr, size_t __len, int __prot,
			   int __flags, int __fd, __off64_t __offset) __THROW,
			  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.  */
extern int msync (void *__addr, size_t __len, int __flags) __THROW;

#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
/* Remap pages mapped by the range [ADDR,ADDR+OLD_LEN) to new length
   NEW_LEN.  If MAY_MOVE is MREMAP_MAYMOVE the returned address may
   differ from ADDR.  */
extern void *mremap (void *__addr, size_t __old_len, size_t __new_len,
		     int __may_move) __THROW;

/* 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);
#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

/* Now define the internal interfaces.  */
extern void *__mmap (void *__addr, size_t __len, int __prot,
		     int __flags, int __fd, __off_t __offset);
extern void *__mmap64 (void *__addr, size_t __len, int __prot,
		       int __flags, int __fd, __off64_t __offset);
extern int __munmap (void *__addr, size_t __len);
extern int __mprotect (void *__addr, size_t __len, int __prot);

/* This one is Linux specific.  */
extern void *__mremap (void *__addr, size_t __old_len,
		       size_t __new_len, int __may_move);

#endif	/* sys/mman.h */
