File: [local] / prex-old / sys / include / device.h (download)
Revision 1.1.1.1.2.1, Wed Aug 13 16:12:30 2008 UTC (16 years, 1 month ago) by nbrk
Branch: PREX_0_8_BASE
Changes since 1.1.1.1: +3 -4 lines
Prex 0.8.0 has been released. Branch off from vanilla PREX_0_7_BASE preparing
the tree for backporting my changes.
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/*-
* Copyright (c) 2005-2007, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _DEVICE_H
#define _DEVICE_H
/*
* Device I/O table
*/
struct devio {
int (*open) (device_t, int);
int (*close)(device_t);
int (*read) (device_t, char *, size_t *, int);
int (*write)(device_t, char *, size_t *, int);
int (*ioctl)(device_t, u_long, void *);
int (*event)(int);
};
/*
* Device structure
*/
struct device {
int magic; /* magic number */
int refcnt; /* reference count */
int flags; /* device characteristics */
struct list link; /* linkage on device list */
struct devio *devio; /* device i/o table */
char name[MAXDEVNAME]; /* name of device */
};
#define device_valid(dev) (kern_area(dev) && ((dev)->magic == DEVICE_MAGIC))
extern int device_open(const char *, int, device_t *);
extern int device_close(device_t);
extern int device_read(device_t, void *, size_t *, int);
extern int device_write(device_t, void *, size_t *, int);
extern int device_ioctl(device_t, u_long, void *);
extern int device_info(struct info_device *);
extern void device_init(void);
#endif /* !_DEVICE_H */