aboutsummaryrefslogtreecommitdiff
path: root/gdb/serial.h
blob: a9dba27212529328d2453e1cd80a822e74e2f392 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
/* Remote serial support interface definitions for GDB, the GNU Debugger.
   Copyright 1992, 1993 Free Software Foundation, Inc.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* Terminal state pointer.  This is specific to each type of interface. */

typedef PTR serial_ttystate;

struct _serial_t
{
  int fd;			/* File descriptor */
  struct serial_ops *ops;	/* Function vector */
  serial_ttystate ttystate;	/* Not used (yet) */
  int bufcnt;			/* Amount of data in receive buffer */
  unsigned char *bufp;		/* Current byte */
  unsigned char buf[BUFSIZ];	/* Da buffer itself */
  int current_timeout;		/* (termio{s} only), last value of VTIME */
};

typedef struct _serial_t *serial_t;

struct serial_ops {
  char *name;
  struct serial_ops *next;
  int (*open) PARAMS ((serial_t, const char *name));
  void (*close) PARAMS ((serial_t));
  int (*readchar) PARAMS ((serial_t, int timeout));
  int (*write) PARAMS ((serial_t, const char *str, int len));
  int (*flush_output) PARAMS ((serial_t));
  int (*flush_input) PARAMS ((serial_t));
  int (*send_break) PARAMS ((serial_t));
  void (*go_raw) PARAMS ((serial_t));
  serial_ttystate (*get_tty_state) PARAMS ((serial_t));
  int (*set_tty_state) PARAMS ((serial_t, serial_ttystate));
  void (*print_tty_state) PARAMS ((serial_t, serial_ttystate));
  int (*noflush_set_tty_state)
    PARAMS ((serial_t, serial_ttystate, serial_ttystate));
  int (*setbaudrate) PARAMS ((serial_t, int rate));
  int (*set_process_group) PARAMS ((serial_t, serial_ttystate, int));
};

/* Add a new serial interface to the interface list */

void serial_add_interface PARAMS ((struct serial_ops *optable));

serial_t serial_open PARAMS ((const char *name));

serial_t serial_fdopen PARAMS ((int fd));

/* For most routines, if a failure is indicated, then errno should be
   examined.  */

/* Try to open NAME.  Returns a new serial_t on success, NULL on failure.
 */

#define SERIAL_OPEN(NAME) serial_open(NAME)

/* Open a new serial stream using a file handle.  */

#define SERIAL_FDOPEN(FD) serial_fdopen(FD)

/* Flush pending output.  Might also flush input (if this system can't flush
   only output).  */

#define SERIAL_FLUSH_OUTPUT(SERIAL_T) \
  ((SERIAL_T)->ops->flush_output((SERIAL_T)))

/* Flush pending input.  Might also flush output (if this system can't flush
   only input).  */

#define SERIAL_FLUSH_INPUT(SERIAL_T)\
  ((*(SERIAL_T)->ops->flush_input) ((SERIAL_T)))

/* Send a break between 0.25 and 0.5 seconds long.  */

#define SERIAL_SEND_BREAK(SERIAL_T) \
  ((*(SERIAL_T)->ops->send_break) (SERIAL_T))

/* Turn the port into raw mode. */

#define SERIAL_RAW(SERIAL_T) (SERIAL_T)->ops->go_raw((SERIAL_T))

/* Return a pointer to a newly malloc'd ttystate containing the state
   of the tty.  */
#define SERIAL_GET_TTY_STATE(SERIAL_T) (SERIAL_T)->ops->get_tty_state((SERIAL_T))

/* Set the state of the tty to TTYSTATE.  The change is immediate.
   When changing to or from raw mode, input might be discarded.  */
#define SERIAL_SET_TTY_STATE(SERIAL_T, TTYSTATE) (SERIAL_T)->ops->set_tty_state((SERIAL_T), (TTYSTATE))

/* printf_filtered a user-comprehensible description of ttystate.  */
#define SERIAL_PRINT_TTY_STATE(SERIAL_T, TTYSTATE) \
  ((*((SERIAL_T)->ops->print_tty_state)) ((SERIAL_T), (TTYSTATE)))

/* Set the tty state to NEW_TTYSTATE, where OLD_TTYSTATE is the
   current state (generally obtained from a recent call to
   SERIAL_GET_TTY_STATE), but be careful not to discard any input.
   This means that we never switch in or out of raw mode, even
   if NEW_TTYSTATE specifies a switch.  */
#define SERIAL_NOFLUSH_SET_TTY_STATE(SERIAL_T, NEW_TTYSTATE, OLD_TTYSTATE) \
  ((*((SERIAL_T)->ops->noflush_set_tty_state)) \
    ((SERIAL_T), (NEW_TTYSTATE), (OLD_TTYSTATE)))

/* Read one char from the serial device with TIMEOUT seconds timeout.
   Returns char if ok, else one of the following codes.  Note that all
   error codes are guaranteed to be < 0.  */

#define SERIAL_ERROR -1		/* General error, see errno for details */
#define SERIAL_TIMEOUT -2
#define SERIAL_EOF -3

#define SERIAL_READCHAR(SERIAL_T, TIMEOUT) ((SERIAL_T)->ops->readchar((SERIAL_T), TIMEOUT))

/* Set the baudrate to the decimal value supplied.  Returns 0 for success,
   -1 for failure.  */

#define SERIAL_SETBAUDRATE(SERIAL_T, RATE) ((SERIAL_T)->ops->setbaudrate((SERIAL_T), RATE))

/* Write LEN chars from STRING to the port SERIAL_T.  Returns 0 for success,
   -1 for failure.  */

#define SERIAL_WRITE(SERIAL_T, STRING, LEN) ((SERIAL_T)->ops->write((SERIAL_T), STRING, LEN))

/* Push out all buffers, close the device and destroy SERIAL_T. */

void serial_close PARAMS ((serial_t));

#define SERIAL_CLOSE(SERIAL_T) serial_close(SERIAL_T)

/* Destroy SERIAL_T without doing the rest of the stuff that SERIAL_CLOSE
   does.  */

#define SERIAL_UN_FDOPEN(SERIAL_T) (free (SERIAL_T))

/* Set the process group saved in TTYSTATE to GROUP.  This just modifies
   the ttystate setting; need to call SERIAL_SET_TTY_STATE for this to
   actually have any effect.  If no job control, then don't do anything.  */
#define SERIAL_SET_PROCESS_GROUP(SERIAL_T, TTYSTATE, GROUP) \
  ((*((SERIAL_T)->ops->set_process_group)) (SERIAL_T, TTYSTATE, GROUP))

/* Do we have job control?  Can be assumed to always be the same within
   a given run of GDB.  In ser-unix.c, ser-go32.c, etc.  */
extern int job_control;

/* Set the process group of the caller to its own pid, or do nothing if
   we lack job control.  */
extern int gdb_setpgid PARAMS ((void));