#ifndef __MMAN_LOADED
#define __MMAN_LOADED 1

#pragma __nostandard
#include <decc$types.h>

#if __CRTL_VER >= 70000000  /*  Only OpenVMS V7.0 or later  */
/****************************************************************************
**
**  <sys/mman.h> - Declarations for mapping pages of memory
**
*****************************************************************************
**  Header introduced by the X/Open CAE Specification, Issue 4, Version 2
*****************************************************************************
**
**  Copyright 2000 Compaq Computer Corporation
**
**  Compaq and the Compaq logo Registered in U.S. Patent and Trademark Office.
**
**  Confidential computer software. Valid license from Compaq required for
**  possession, use or copying. Consistent with FAR 12.211 and 12.212,
**  Commercial Computer Software, Computer Software Documentation, and
**  Technical Data for Commercial Items are licensed to the U.S. Government
**  under vendor's standard commercial license.
**
******************************************************************************
*/

#ifdef __cplusplus
    extern "C" {
#endif

#if __INITIAL_POINTER_SIZE
#   pragma __pointer_size __save
#   pragma __pointer_size 32
#endif


/*
**  Define off_t and size_t structures
*/
#ifndef __OFF_T
#   define __OFF_T 1
    typedef __off_t off_t;
#endif

#ifndef __SIZE_T
#   define __SIZE_T 1
    typedef __size_t size_t;
#endif


/*  
**  Symbolic constants for protection for mmap, mprotect
*/  
#define  PROT_NONE      0
#define  PROT_READ      1
#define  PROT_WRITE     2
#define  PROT_EXEC      4


/*  
**  Specify either MAP_SHARED or MAP_PRIVATE
*/  
#define  MAP_SHARED     0x01 
#define  MAP_PRIVATE    0x02


/*  
**  Specify wither MAP_FIXED or MAP_VARIABLE
*/  
#define  MAP_FIXED      0x100

#if !defined _XOPEN_SOURCE_EXTENDED
#   define  MAP_VARIABLE   0x200
#endif

/*  
** failure status from mmap()
*/  
#define MAP_FAILED      ((void *)-1)

/*  
**  Flags for msync()
*/  
#define  MS_ASYNC       0x01
#define  MS_SYNC        0x02
#define  MS_INVALIDATE  0x04

#if !defined _XOPEN_SOURCE_EXTENDED
    /*  
    **  Specify either MAP_FILE or MAP_ANONYMOUS
    */  
#   define  MAP_ANONYMOUS  0x10
#   define  MAP_ANON       0x10
#   define  MAP_FILE       0x20
#endif

/*
**  At this point in the processing, we are done defining those things which
**  must always be short pointers.  If the user has used the /pointer_size
**  qualifier, we will allow long pointers to be used in function calls
**  regardless of whether they have specified short or long pointers.
*/
#if __INITIAL_POINTER_SIZE
#   pragma __pointer_size 64
#endif


/*
**  Functions which accept either 32 bit or 64 bit pointers
*/
int   mprotect (void *addr, __size_t len, int prot);
int   munmap   (void *addr, __size_t len);
int   msync    (void *addr, __size_t len, int flags);

#if __CRTL_VER >= 70200000

/*
**  shm_open and shm_unlink functions were added in OpenVMS V7.2
*/

int shm_open (const char * __name, int __oflag, __mode_t __mode);
int shm_unlink (const char * __name);

#endif

/*
**  Functions which have separate implementations for 32 bit and 64 bit
**  pointers.  The implementation defaults to that corresponding to the
**  default pointer size used in the /POINTER_SIZE qualifier.
*/
#if __INITIAL_POINTER_SIZE == 32
#   pragma __pointer_size 32
#endif

/*
**  Beginning in OpenVMS V7.2, the mmap() function was enhanced to
**  allow specifying an additional parameter through which the caller
**  can request creation a special kind of the global section for
**  MAP_SHARED (DEC C extension).
*/

#if !defined(_XOPEN_SOURCE) && !defined(_POSIX_C_SOURCE) && __CRTL_VER > 70100622
    void *mmap (void *addr, __size_t len, int prot, int flags, int filedes, __off_t off, ...);
#else
    void *mmap (void *addr, __size_t len, int prot, int flags, int filedes, __off_t off);
#endif

#if __INITIAL_POINTER_SIZE

#   pragma __pointer_size 32

#   if !defined(_XOPEN_SOURCE) && !defined(_POSIX_C_SOURCE) && __CRTL_VER > 70100622
        void *_mmap32 (void *addr, __size_t len, int prot, int flags, int filedes, __off_t off, ...);
#   else
        void *_mmap32 (void *addr, __size_t len, int prot, int flags, int filedes, __off_t off);
#   endif

#   pragma __pointer_size 64

#if !defined(_XOPEN_SOURCE) && !defined(_POSIX_C_SOURCE) && __CRTL_VER > 70100622
        void *_mmap64 (void *addr, __size_t len, int prot, int flags, int filedes, __off_t off, ...);
#   else
        void *_mmap64 (void *addr, __size_t len, int prot, int flags, int filedes, __off_t off);
#   endif

#endif


/*
**  Restore the users pointer context
*/
#if __INITIAL_POINTER_SIZE
#   pragma __pointer_size __restore
#endif

#ifdef __cplusplus
    }
#endif

#endif /* OpenVMS V7.0 or later */
#pragma __standard
#endif /* __MMAN_LOADED */