/* Remote serial support interface definitions for GDB, the GNU Debugger.
- Copyright 1992, 1993, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2004,
+ 2005, 2006, 2007, 2008 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef SERIAL_H
#define SERIAL_H
+#ifdef USE_WIN32API
+#include <windows.h>
+#endif
+
+struct ui_file;
+
/* For most routines, if a failure is indicated, then errno should be
examined. */
/* Terminal state pointer. This is specific to each type of
- interface. */
+ interface. */
typedef void *serial_ttystate;
-struct _serial_t;
-typedef struct _serial_t *serial_t;
+struct serial;
-/* Try to open NAME. Returns a new serial_t on success, NULL on
- failure. */
+/* Try to open NAME. Returns a new `struct serial *' on success, NULL
+ on failure. Note that some open calls can block and, if possible,
+ should be written to be non-blocking, with calls to ui_look_hook
+ so they can be cancelled. An async interface for open could be
+ added to GDB if necessary. */
-extern serial_t serial_open (const char *name);
-#define SERIAL_OPEN(NAME) serial_open(NAME)
-
-/* Open a new serial stream using a file handle. */
+extern struct serial *serial_open (const char *name);
-extern serial_t serial_fdopen (const int fd);
-#define SERIAL_FDOPEN(FD) serial_fdopen(FD)
+/* Find an already opened serial stream using a file handle. */
-/* Push out all buffers, close the device and destroy SERIAL_T. */
+extern struct serial *serial_for_fd (int fd);
-extern void serial_close (serial_t);
-#define SERIAL_CLOSE(SERIAL_T) serial_close ((SERIAL_T))
+/* Open a new serial stream using a file handle. */
-/* Push out all buffers and destroy SERIAL_T without closing the
- device. */
+extern struct serial *serial_fdopen (const int fd);
-extern void serial_un_fdopen (serial_t scb);
-#define SERIAL_UN_FDOPEN(SERIAL_T) serial_un_fdopen ((SERIAL_T))
+/* Push out all buffers, close the device and destroy SCB. */
-/* Read one char from the serial device with TIMEOUT seconds to wait
- or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
- char if ok, else one of the following codes. Note that all error
- codes are guaranteed to be < 0. */
+extern void serial_close (struct serial *scb);
-#define SERIAL_ERROR -1 /* General error, see errno for details */
-#define SERIAL_TIMEOUT -2
-#define SERIAL_EOF -3
+/* Push out all buffers and destroy SCB without closing the device. */
-extern int serial_readchar (serial_t scb, int timeout);
-#define SERIAL_READCHAR(SERIAL_T, TIMEOUT) serial_readchar ((SERIAL_T), (TIMEOUT))
+extern void serial_un_fdopen (struct serial *scb);
-/* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for
+/* Read one char from the serial device with TIMEOUT seconds to wait
+ or -1 to wait forever. Use timeout of 0 to effect a poll.
+ Infinite waits are not permitted. Returns unsigned char if ok, else
+ one of the following codes. Note that all error return-codes are
+ guaranteed to be < 0. */
+
+enum serial_rc {
+ SERIAL_ERROR = -1, /* General error. */
+ SERIAL_TIMEOUT = -2, /* Timeout or data-not-ready during read.
+ Unfortunately, through
+ deprecated_ui_loop_hook (), this can also
+ be a QUIT indication. */
+ SERIAL_EOF = -3 /* General end-of-file or remote target
+ connection closed, indication. Includes
+ things like the line dropping dead. */
+};
+
+extern int serial_readchar (struct serial *scb, int timeout);
+
+/* Write LEN chars from STRING to the port SCB. Returns 0 for
success, non-zero for failure. */
-extern int serial_write (serial_t scb, const char *str, int len);
-#define SERIAL_WRITE(SERIAL_T, STRING,LEN) serial_write (SERIAL_T, STRING, LEN)
+extern int serial_write (struct serial *scb, const char *str, int len);
-/* Write a printf style string onto the serial port. */
+/* Write a printf style string onto the serial port. */
-extern void serial_printf (serial_t desc, const char *,...) ATTR_FORMAT (printf, 2, 3);
+extern void serial_printf (struct serial *desc,
+ const char *,...) ATTR_FORMAT (printf, 2, 3);
-/* Allow pending output to drain. */
+/* Allow pending output to drain. */
-extern int serial_drain_output (serial_t);
-#define SERIAL_DRAIN_OUTPUT(SERIAL_T) serial_drain_output ((SERIAL_T))
+extern int serial_drain_output (struct serial *);
/* Flush (discard) pending output. Might also flush input (if this
system can't flush only output). */
-extern int serial_flush_output (serial_t);
-#define SERIAL_FLUSH_OUTPUT(SERIAL_T) serial_flush_output ((SERIAL_T))
+extern int serial_flush_output (struct serial *);
/* Flush pending input. Might also flush output (if this system can't
flush only input). */
-extern int serial_flush_input (serial_t);
-#define SERIAL_FLUSH_INPUT(SERIAL_T) serial_flush_input ((SERIAL_T))
+extern int serial_flush_input (struct serial *);
/* Send a break between 0.25 and 0.5 seconds long. */
-extern int serial_send_break (serial_t scb);
-#define SERIAL_SEND_BREAK(SERIAL_T) serial_send_break (SERIAL_T)
+extern int serial_send_break (struct serial *scb);
-/* Turn the port into raw mode. */
+/* Turn the port into raw mode. */
-extern void serial_raw (serial_t scb);
-#define SERIAL_RAW(SERIAL_T) serial_raw ((SERIAL_T))
+extern void serial_raw (struct serial *scb);
/* Return a pointer to a newly malloc'd ttystate containing the state
of the tty. */
-extern serial_ttystate serial_get_tty_state (serial_t scb);
-#define SERIAL_GET_TTY_STATE(SERIAL_T) serial_get_tty_state ((SERIAL_T))
+extern serial_ttystate serial_get_tty_state (struct serial *scb);
/* Set the state of the tty to TTYSTATE. The change is immediate.
When changing to or from raw mode, input might be discarded.
Returns 0 for success, negative value for error (in which case
errno contains the error). */
-extern int serial_set_tty_state (serial_t scb, serial_ttystate ttystate);
-#define SERIAL_SET_TTY_STATE(SERIAL_T, TTYSTATE) serial_set_tty_state ((SERIAL_T), (TTYSTATE))
+extern int serial_set_tty_state (struct serial *scb, serial_ttystate ttystate);
/* printf_filtered a user-comprehensible description of ttystate on
the specified STREAM. FIXME: At present this sends output to the
- default stream - GDB_STDOUT. */
+ default stream - GDB_STDOUT. */
-extern void serial_print_tty_state (serial_t scb, serial_ttystate ttystate, struct gdb_file *);
-#define SERIAL_PRINT_TTY_STATE(SERIAL_T, TTYSTATE, STREAM) serial_print_tty_state ((SERIAL_T), (TTYSTATE), (STREAM))
+extern void serial_print_tty_state (struct serial *scb, serial_ttystate ttystate, struct ui_file *);
/* 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.
+ 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. */
-extern int serial_noflush_set_tty_state (serial_t scb, serial_ttystate new_ttystate, serial_ttystate old_ttystate);
-#define SERIAL_NOFLUSH_SET_TTY_STATE(SERIAL_T, NEW_TTYSTATE, OLD_TTYSTATE) \
-serial_noflush_set_tty_state ((SERIAL_T), (NEW_TTYSTATE), (OLD_TTYSTATE))
+extern int serial_noflush_set_tty_state (struct serial *scb, serial_ttystate new_ttystate, serial_ttystate old_ttystate);
/* Set the baudrate to the decimal value supplied. Returns 0 for
success, -1 for failure. */
-extern int serial_setbaudrate (serial_t scb, int rate);
-#define SERIAL_SETBAUDRATE(SERIAL_T, RATE) serial_setbaudrate ((SERIAL_T), (RATE))
+extern int serial_setbaudrate (struct serial *scb, int rate);
/* Set the number of stop bits to the value specified. Returns 0 for
success, -1 for failure. */
#define SERIAL_1_STOPBITS 1
-#define SERIAL_1_AND_A_HALF_STOPBITS 2 /* 1.5 bits, snicker... */
+#define SERIAL_1_AND_A_HALF_STOPBITS 2 /* 1.5 bits, snicker... */
#define SERIAL_2_STOPBITS 3
-extern int serial_setstopbits (serial_t scb, int num);
-#define SERIAL_SETSTOPBITS(SERIAL_T, NUM) serial_setstopbits ((SERIAL_T), (NUM))
+extern int serial_setstopbits (struct serial *scb, int num);
/* Asynchronous serial interface: */
/* Can the serial device support asynchronous mode? */
-extern int serial_can_async_p (serial_t scb);
-#define SERIAL_CAN_ASYNC_P(SERIAL_T) serial_can_async_p ((SERIAL_T))
+extern int serial_can_async_p (struct serial *scb);
/* Has the serial device been put in asynchronous mode? */
-extern int serial_is_async_p (serial_t scb);
-#define SERIAL_IS_ASYNC_P(SERIAL_T) serial_is_async_p ((SERIAL_T))
+extern int serial_is_async_p (struct serial *scb);
/* For ASYNC enabled devices, register a callback and enable
asynchronous mode. To disable asynchronous mode, register a NULL
- callback. */
+ callback. */
-typedef void (serial_event_ftype) (int error, void *context, int fd);
-extern void serial_async (serial_t scb, serial_event_ftype *handler, void *context);
-#define SERIAL_ASYNC(SERIAL_T, HANDLER, CONTEXT) serial_async ((SERIAL_T), (HANDLER), (CONTEXT))
+typedef void (serial_event_ftype) (struct serial *scb, void *context);
+extern void serial_async (struct serial *scb, serial_event_ftype *handler, void *context);
/* Provide direct access to the underlying FD (if any) used to
implement the serial device. This interface is clearly
deprecated. Will call internal_error() if the operation isn't
- applicable to the current serial device. */
+ applicable to the current serial device. */
+
+extern int deprecated_serial_fd (struct serial *scb);
-extern int deprecated_serial_fd (serial_t scb);
-#define DEPRECATED_SERIAL_FD(SERIAL_T) deprecated_serial_fd ((SERIAL_T))
+/* Trace/debug mechanism.
+
+ serial_debug() enables/disables internal debugging.
+ serial_debug_p() indicates the current debug state. */
+
+extern void serial_debug (struct serial *scb, int debug_p);
+
+extern int serial_debug_p (struct serial *scb);
/* Details of an instance of a serial object */
-struct _serial_t
+struct serial
{
int fd; /* File descriptor */
+ /* File descriptor for a separate error stream that should be
+ immediately forwarded to gdb_stderr. This may be -1.
+ If != -1, this descriptor should be non-blocking or
+ ops->avail should be non-NULL. */
+ int error_fd;
struct serial_ops *ops; /* Function vector */
void *state; /* Local context info for open FD */
serial_ttystate ttystate; /* Not used (yet) */
- int bufcnt; /* Amount of data in receive buffer */
+ int bufcnt; /* Amount of data remaining in receive
+ buffer. -ve for sticky errors. */
unsigned char *bufp; /* Current byte */
unsigned char buf[BUFSIZ]; /* Da buffer itself */
- int current_timeout; /* (termio{s} only), last value of VTIME */
- /* ser-unix.c termio{,s} only, we still need to wait for this many more
- seconds. */
- int timeout_remaining;
+ int current_timeout; /* (ser-unix.c termio{,s} only), last
+ value of VTIME */
+ int timeout_remaining; /* (ser-unix.c termio{,s} only), we
+ still need to wait for this many
+ more seconds. */
char *name; /* The name of the device or host */
- struct _serial_t *next; /* Pointer to the next serial_t */
+ struct serial *next; /* Pointer to the next `struct serial *' */
int refcnt; /* Number of pointers to this block */
+ int debug_p; /* Trace this serial devices operation. */
+ int async_state; /* Async internal state. */
void *async_context; /* Async event thread's context */
serial_event_ftype *async_handler;/* Async event handler */
};
{
char *name;
struct serial_ops *next;
- int (*open) (serial_t, const char *name);
- void (*close) (serial_t);
- int (*readchar) (serial_t, int timeout);
- int (*write) (serial_t, const char *str, int len);
+ int (*open) (struct serial *, const char *name);
+ void (*close) (struct serial *);
+ int (*readchar) (struct serial *, int timeout);
+ int (*write) (struct serial *, const char *str, int len);
/* Discard pending output */
- int (*flush_output) (serial_t);
+ int (*flush_output) (struct serial *);
/* Discard pending input */
- int (*flush_input) (serial_t);
- int (*send_break) (serial_t);
- void (*go_raw) (serial_t);
- serial_ttystate (*get_tty_state) (serial_t);
- int (*set_tty_state) (serial_t, serial_ttystate);
- void (*print_tty_state) (serial_t, serial_ttystate, struct gdb_file *);
- int (*noflush_set_tty_state) (serial_t, serial_ttystate, serial_ttystate);
- int (*setbaudrate) (serial_t, int rate);
- int (*setstopbits) (serial_t, int num);
+ int (*flush_input) (struct serial *);
+ int (*send_break) (struct serial *);
+ void (*go_raw) (struct serial *);
+ serial_ttystate (*get_tty_state) (struct serial *);
+ int (*set_tty_state) (struct serial *, serial_ttystate);
+ void (*print_tty_state) (struct serial *, serial_ttystate,
+ struct ui_file *);
+ int (*noflush_set_tty_state) (struct serial *, serial_ttystate,
+ serial_ttystate);
+ int (*setbaudrate) (struct serial *, int rate);
+ int (*setstopbits) (struct serial *, int num);
/* Wait for output to drain */
- int (*drain_output) (serial_t);
+ int (*drain_output) (struct serial *);
/* Change the serial device into/out of asynchronous mode, call
the specified function when ever there is something
- interesting. */
- void (*async) (serial_t scb, int async_p);
+ interesting. */
+ void (*async) (struct serial *scb, int async_p);
+ /* Perform a low-level read operation, reading (at most) COUNT
+ bytes into SCB->BUF. Return zero at end of file. */
+ int (*read_prim)(struct serial *scb, size_t count);
+ /* Perform a low-level write operation, writing (at most) COUNT
+ bytes from BUF. */
+ int (*write_prim)(struct serial *scb, const void *buf, size_t count);
+ /* Return that number of bytes that can be read from FD
+ without blocking. Return value of -1 means that the
+ the read will not block even if less that requested bytes
+ are available. */
+ int (*avail)(struct serial *scb, int fd);
+
+#ifdef USE_WIN32API
+ /* Return a handle to wait on, indicating available data from SCB
+ when signaled, in *READ. Return a handle indicating errors
+ in *EXCEPT. */
+ void (*wait_handle) (struct serial *scb, HANDLE *read, HANDLE *except);
+ void (*done_wait_handle) (struct serial *scb);
+#endif /* USE_WIN32API */
};
/* Add a new serial interface to the interface list */
extern void serial_log_command (const char *);
+#ifdef USE_WIN32API
+
+/* Windows-only: find or create handles that we can wait on for this
+ serial device. */
+extern void serial_wait_handle (struct serial *, HANDLE *, HANDLE *);
+
+/* Windows-only: signal that we are done with the wait handles. */
+extern void serial_done_wait_handle (struct serial *);
+
+#endif /* USE_WIN32API */
+
#endif /* SERIAL_H */