Annotation of prex-old/sys/include/device.h, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 2005-2007, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #ifndef _DEVICE_H
31: #define _DEVICE_H
32:
33: /*
34: * Device I/O table
35: */
36: struct devio {
37: int (*open) (device_t, int);
38: int (*close)(device_t);
39: int (*read) (device_t, char *, size_t *, int);
40: int (*write)(device_t, char *, size_t *, int);
41: int (*ioctl)(device_t, int, u_long);
42: int (*event)(int);
43: };
44:
45: /*
46: * Device structure
47: */
48: struct device {
49: int magic; /* magic number */
50: int ref_count; /* reference count */
51: int flags; /* device characteristics */
52: struct list link; /* linkage on device list */
53: struct devio *devio; /* device i/o table */
54: char name[MAXDEVNAME]; /* name of device */
55: };
56:
57: #define device_valid(dev) (kern_area(dev) && ((dev)->magic == DEVICE_MAGIC))
58:
59: extern int device_open(const char *, int, device_t *);
60: extern int device_close(device_t);
61: extern int device_read(device_t, void *, size_t *, int);
62: extern int device_write(device_t, void *, size_t *, int);
63: extern int device_ioctl(device_t, int, u_long);
64: extern int device_info(struct info_device *);
65: extern void device_dump(void);
66: extern void device_init(void);
67:
68: #endif /* !_DEVICE_H */
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