newlib-cygwin/winsup/cygwin/include/sys/mman.h

/* sys/mman.h

This file is part of Cygwin.

This software is a copyrighted work licensed under the terms of the
Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
details. */

#ifndef _SYS_MMAN_H_
#define _SYS_MMAN_H_

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include <stddef.h>
#include <sys/types.h>

#define PROT_NONE 0
#define PROT_READ 1
#define PROT_WRITE 2
#define PROT_EXEC 4

#define MAP_FILE 0
#define MAP_SHARED 1
#define MAP_PRIVATE 2
#define MAP_TYPE 0xF
#define MAP_FIXED 0x10
#define MAP_ANONYMOUS 0x20
#define MAP_ANON MAP_ANONYMOUS
/* Non-standard flag */
#define MAP_NORESERVE 0x4000	/* Don't reserve swap space for this mapping.
				   Page protection must be set explicitely
				   to access page. Only supported for anonymous
				   private mappings. */
#define MAP_AUTOGROW 0x8000	/* Grow underlying object to mapping size.
				   File must be opened for writing. */

#define MAP_FAILED ((void *)-1)

/*
 * Flags for msync.
 */
#define MS_ASYNC 1
#define MS_SYNC 2
#define MS_INVALIDATE 4

/*
 * Flags for posix_madvise.
 */
#define POSIX_MADV_NORMAL 0
#define POSIX_MADV_SEQUENTIAL 1
#define POSIX_MADV_RANDOM 2
#define POSIX_MADV_WILLNEED 3
#define POSIX_MADV_DONTNEED 4

/*
 * Flags for madvise.  BSD/Linux-specific.
 */
#define MADV_NORMAL 0
#define MADV_SEQUENTIAL 1
#define MADV_RANDOM 2
#define MADV_WILLNEED 3
#define MADV_DONTNEED 4
/* Deliberately don't define these Linux-specific flags.  An application
   expecting them to behave as defined would be in for a surprise. */
#if 0
#define MADV_REMOVE 5
#define MADV_DONTFORK 6
#define MADV_DOFORK 7
#define MADV_HWPOISON 8
#define MADV_SOFT_OFFLINE 9
#define MADV_MERGEABLE 10
#define MADV_UNMERGEABLE 11
#endif

extern void *mmap (void *__addr, size_t __len, int __prot, int __flags, int __fd, off_t __off);
extern int munmap (void *__addr, size_t __len);
extern int mprotect (void *__addr, size_t __len, int __prot);
extern int msync (void *__addr, size_t __len, int __flags);
extern int mlock (const void *__addr, size_t __len);
extern int munlock (const void *__addr, size_t __len);

extern int posix_madvise (void *__addr, size_t __len, int __advice);
extern int madvise (void *__addr, size_t __len, int __advice);

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

#ifdef __cplusplus
};
#endif /* __cplusplus */

#endif /*  _SYS_MMAN_H_ */