/* sys/ioctl.h

   Copyright 1998, 2001, 2002, 2003, 2004, 2005 Red Hat, Inc.

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. */

/* sys/ioctl.h */

#ifndef _SYS_IOCTL_H
#define _SYS_IOCTL_H

#include <sys/cdefs.h>

__BEGIN_DECLS

/* /dev/windows ioctls */

#define WINDOWS_POST	0	/* Set write() behavior to PostMessage() */
#define WINDOWS_SEND	1	/* Set write() behavior to SendMessage() */
#define WINDOWS_HWND	2	/* Set hWnd for read() calls */

/* Some standard linux defines */

#define _IOC_NRBITS     8
#define _IOC_TYPEBITS   8
#define _IOC_SIZEBITS   14
#define _IOC_DIRBITS    2
 
#define _IOC_NRMASK     ((1 << _IOC_NRBITS)-1)
#define _IOC_TYPEMASK   ((1 << _IOC_TYPEBITS)-1)
#define _IOC_SIZEMASK   ((1 << _IOC_SIZEBITS)-1)
#define _IOC_DIRMASK    ((1 << _IOC_DIRBITS)-1)
 
#define _IOC_NRSHIFT    0
#define _IOC_TYPESHIFT  (_IOC_NRSHIFT+_IOC_NRBITS)
#define _IOC_SIZESHIFT  (_IOC_TYPESHIFT+_IOC_TYPEBITS)
#define _IOC_DIRSHIFT   (_IOC_SIZESHIFT+_IOC_SIZEBITS)
 
#define _IOC_NONE       0U
#define _IOC_WRITE      1U
#define _IOC_READ       2U
 
#define _IOC(dir,type,nr,size) \
       (((dir)  << _IOC_DIRSHIFT) | \
	 +       ((type) << _IOC_TYPESHIFT) | \
	 +       ((nr)   << _IOC_NRSHIFT) | \
	 +       ((size) << _IOC_SIZESHIFT))

#define _IO(type,nr)            _IOC(_IOC_NONE,(type),(nr),0)
#define _IOR(type,nr,size)      _IOC(_IOC_READ,(type),(nr),sizeof(size))
#define _IOW(type,nr,size)      _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
#define _IOWR(type,nr,size)     _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))

int __cdecl ioctl (int __fd, int __cmd, ...);

__END_DECLS

#endif