source: rtems/cpukit/libcsupport/include/rtems/libio.h @ 118a812

4.104.114.84.95
Last change on this file since 118a812 was 118a812, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 23, 1997 at 1:13:46 PM

New termios.c from Eric Norum.

Added new entry point to add in per physical port resource requirements.

  • Property mode set to 100644
File size: 4.8 KB
Line 
1/*
2 * General purpose communication channel for RTEMS to allow UNIX/POSIX
3 *    system call behavior on top of RTEMS IO devices.
4 *
5 * TODO
6 *      stat(2)
7 *      unlink(2)
8 *      rename(2)
9 *
10 *  $Id$
11 */
12
13#ifndef _RTEMS_LIBIO_H
14#define _RTEMS_LIBIO_H
15
16#include <sys/stat.h>
17
18typedef unsigned32 rtems_libio_offset_t;
19
20/*
21 * An open file data structure, indexed by 'fd'
22 * TODO:
23 *    should really have a separate per/file data structure that this
24 *    points to (eg: size, offset, driver, pathname should be in that)
25 */
26
27typedef struct {
28    rtems_driver_name_t *driver;
29    rtems_libio_offset_t size;          /* size of file */
30    rtems_libio_offset_t offset;        /* current offset into the file */
31    unsigned32           flags;
32    char                *pathname;      /* opened pathname */
33    Objects_Id           sem;
34    unsigned32           data0;         /* private to "driver" */
35    void                *data1;         /* ... */
36} rtems_libio_t;
37
38
39/*
40 * param block for read/write
41 * Note: it must include 'offset' instead of using iop's offset since
42 *       we can have multiple outstanding i/o's on a device.
43 */
44
45typedef struct {
46    rtems_libio_t          *iop;
47    rtems_libio_offset_t    offset;
48    unsigned8              *buffer;
49    unsigned32              count;
50    unsigned32              flags;
51    unsigned32              bytes_moved;
52} rtems_libio_rw_args_t;
53
54/*
55 * param block for open/close
56 */
57
58typedef struct {
59    rtems_libio_t          *iop;
60    unsigned32              flags;
61    unsigned32              mode;
62} rtems_libio_open_close_args_t;
63
64/*
65 * param block for ioctl
66 */
67
68typedef struct {
69    rtems_libio_t          *iop;
70    unsigned32              command;
71    void                   *buffer;
72    unsigned32              ioctl_return;
73} rtems_libio_ioctl_args_t;
74
75
76/*
77 * Values for 'flag'
78 */
79
80#define LIBIO_FLAGS_NO_DELAY      0x0001  /* return immediately if no data */
81#define LIBIO_FLAGS_READ          0x0002  /* reading */
82#define LIBIO_FLAGS_WRITE         0x0004  /* writing */
83#define LIBIO_FLAGS_LINE_BUFFERED 0x0008  /* line buffered io (^h, ^u, etc) */
84#define LIBIO_FLAGS_OPEN          0x0100  /* device is open */
85#define LIBIO_FLAGS_APPEND        0x0200  /* all writes append */
86#define LIBIO_FLAGS_CREATE        0x0400  /* create file */
87
88#define LIBIO_FLAGS_READ_WRITE    (LIBIO_FLAGS_READ | LIBIO_FLAGS_WRITE)
89
90void rtems_libio_config(rtems_configuration_table *config, unsigned32 max_fds);
91void rtems_libio_init(void);
92
93int __rtems_open(const char  *pathname, unsigned32 flag, unsigned32 mode);
94int __rtems_close(int  fd);
95int __rtems_read(int fd, void *buffer, unsigned32 count);
96int __rtems_write(int fd, const void *buffer, unsigned32 count);
97int __rtems_ioctl(int fd, unsigned32  command, void *buffer);
98int __rtems_lseek(int fd, rtems_libio_offset_t offset, int whence);
99int __rtems_fstat(int _fd, struct stat* _sbuf);
100int __rtems_isatty(int _fd);
101
102/*
103 * External I/O handlers
104 */
105typedef struct {
106    int (*open)(const char  *pathname, unsigned32 flag, unsigned32 mode);
107    int (*close)(int  fd);
108    int (*read)(int fd, void *buffer);
109    int (*write)(int fd, const void *buffer, unsigned32 count);
110    int (*ioctl)(int fd, unsigned32  command, void *buffer);
111    int (*lseek)(int fd, rtems_libio_offset_t offset, int whence);
112} rtems_libio_handler_t;
113
114void rtems_register_libio_handler(int handler_flag,
115                                 const rtems_libio_handler_t *handler);
116
117#define RTEMS_FILE_DESCRIPTOR_TYPE_FILE         0x0000
118#define RTEMS_FILE_DESCRIPTOR_TYPE_SOCKET       0x1000
119#define rtems_make_file_descriptor(fd,flags)    ((fd)|(flags))
120#define rtems_file_descriptor_base(fd)          ((fd) & 0x0FFF)
121#define rtems_file_descriptor_type(fd)          ((fd) & 0xF000)
122#define rtems_file_descriptor_type_index(fd)    ((((fd) & 0xF000) >> 12) - 1)
123
124/*
125 *  IOCTL values
126 */
127
128#define       RTEMS_IO_GET_ATTRIBUTES 1
129#define       RTEMS_IO_SET_ATTRIBUTES 2
130
131/*
132 * Termios prototypes
133 */
134void rtems_termios_initialize (void);
135rtems_status_code rtems_termios_open (
136  rtems_device_major_number  major,
137  rtems_device_minor_number  minor,
138  void                      *arg,
139  int                       (*deviceFirstOpen)(int major, int minor, void *arg),
140  int                       (*deviceLastClose)(int major, int minor, void *arg),
141  int                       (*deviceRead)(int minor, char *buf),
142  int                       (*deviceWrite)(int minor, char *buf, int len)
143  );
144
145rtems_status_code rtems_termios_close (void *arg);
146rtems_status_code rtems_termios_read (void *arg);
147rtems_status_code rtems_termios_write (void *arg);
148rtems_status_code rtems_termios_ioctl (void *arg);
149void rtems_termios_enqueue_raw_characters (void *ttyp, char *buf, int len);
150void rtems_termios_reserve_resources(
151  rtems_configuration_table *configuration,
152  rtems_unsigned32           number_of_devices
153);
154
155#endif /* _RTEMS_LIBIO_H */
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