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-rw-r--r--gdb/ser-unix.c292
1 files changed, 3 insertions, 289 deletions
diff --git a/gdb/ser-unix.c b/gdb/ser-unix.c
index bc91894..4f709de 100644
--- a/gdb/ser-unix.c
+++ b/gdb/ser-unix.c
@@ -1,7 +1,7 @@
/* Serial interface for local (hardwired) serial ports on Un*x like systems
Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
- 2003, 2004 Free Software Foundation, Inc.
+ 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
@@ -22,6 +22,7 @@
#include "defs.h"
#include "serial.h"
+#include "ser-base.h"
#include "ser-unix.h"
#include <fcntl.h>
@@ -31,7 +32,6 @@
#include <sys/time.h>
#include "gdb_string.h"
-#include "event-loop.h"
#ifdef HAVE_TERMIOS
@@ -92,11 +92,6 @@ static int hardwire_flush_input (struct serial *);
static int hardwire_send_break (struct serial *);
static int hardwire_setstopbits (struct serial *, int);
-static int do_unix_readchar (struct serial *scb, int timeout);
-static timer_handler_func push_event;
-static handler_func fd_event;
-static void reschedule (struct serial *scb);
-
void _initialize_ser_hardwire (void);
/* Open up a real live device for serial I/O */
@@ -870,31 +865,10 @@ hardwire_close (struct serial *scb)
}
-/* Generic operations used by all UNIX/FD based serial interfaces. */
-
-serial_ttystate
-ser_unix_nop_get_tty_state (struct serial *scb)
-{
- /* allocate a dummy */
- return (serial_ttystate) XMALLOC (int);
-}
-
-int
-ser_unix_nop_set_tty_state (struct serial *scb, serial_ttystate ttystate)
-{
- return 0;
-}
-
-void
-ser_unix_nop_raw (struct serial *scb)
-{
- return; /* Always in raw mode */
-}
-
/* Wait for input on scb, with timeout seconds. Returns 0 on success,
otherwise SERIAL_TIMEOUT or SERIAL_ERROR. */
-int
+static int
ser_unix_wait_for (struct serial *scb, int timeout)
{
while (1)
@@ -1074,267 +1048,7 @@ ser_unix_readchar (struct serial *scb, int timeout)
{
return generic_readchar (scb, timeout, do_unix_readchar);
}
-
-int
-ser_unix_nop_noflush_set_tty_state (struct serial *scb,
- serial_ttystate new_ttystate,
- serial_ttystate old_ttystate)
-{
- return 0;
-}
-
-void
-ser_unix_nop_print_tty_state (struct serial *scb,
- serial_ttystate ttystate,
- struct ui_file *stream)
-{
- /* Nothing to print. */
- return;
-}
-
-int
-ser_unix_nop_setbaudrate (struct serial *scb, int rate)
-{
- return 0; /* Never fails! */
-}
-
-int
-ser_unix_nop_setstopbits (struct serial *scb, int num)
-{
- return 0; /* Never fails! */
-}
-
-int
-ser_unix_write (struct serial *scb, const char *str, int len)
-{
- int cc;
-
- while (len > 0)
- {
- cc = write (scb->fd, str, len);
-
- if (cc < 0)
- return 1;
- len -= cc;
- str += cc;
- }
- return 0;
-}
-
-int
-ser_unix_nop_flush_output (struct serial *scb)
-{
- return 0;
-}
-
-int
-ser_unix_flush_input (struct serial *scb)
-{
- if (scb->bufcnt >= 0)
- {
- scb->bufcnt = 0;
- scb->bufp = scb->buf;
- return 0;
- }
- else
- return SERIAL_ERROR;
-}
-
-int
-ser_unix_nop_send_break (struct serial *scb)
-{
- return 0;
-}
-
-int
-ser_unix_nop_drain_output (struct serial *scb)
-{
- return 0;
-}
-
-
-/* Event handling for ASYNC serial code.
-
- At any time the SERIAL device either: has an empty FIFO and is
- waiting on a FD event; or has a non-empty FIFO/error condition and
- is constantly scheduling timer events.
-
- ASYNC only stops pestering its client when it is de-async'ed or it
- is told to go away. */
-
-/* Value of scb->async_state: */
-enum {
- /* >= 0 (TIMER_SCHEDULED) */
- /* The ID of the currently scheduled timer event. This state is
- rarely encountered. Timer events are one-off so as soon as the
- event is delivered the state is shanged to NOTHING_SCHEDULED. */
- FD_SCHEDULED = -1,
- /* The fd_event() handler is scheduled. It is called when ever the
- file descriptor becomes ready. */
- NOTHING_SCHEDULED = -2
- /* Either no task is scheduled (just going into ASYNC mode) or a
- timer event has just gone off and the current state has been
- forced into nothing scheduled. */
-};
-
-/* Identify and schedule the next ASYNC task based on scb->async_state
- and scb->buf* (the input FIFO). A state machine is used to avoid
- the need to make redundant calls into the event-loop - the next
- scheduled task is only changed when needed. */
-
-static void
-reschedule (struct serial *scb)
-{
- if (serial_is_async_p (scb))
- {
- int next_state;
- switch (scb->async_state)
- {
- case FD_SCHEDULED:
- if (scb->bufcnt == 0)
- next_state = FD_SCHEDULED;
- else
- {
- delete_file_handler (scb->fd);
- next_state = create_timer (0, push_event, scb);
- }
- break;
- case NOTHING_SCHEDULED:
- if (scb->bufcnt == 0)
- {
- add_file_handler (scb->fd, fd_event, scb);
- next_state = FD_SCHEDULED;
- }
- else
- {
- next_state = create_timer (0, push_event, scb);
- }
- break;
- default: /* TIMER SCHEDULED */
- if (scb->bufcnt == 0)
- {
- delete_timer (scb->async_state);
- add_file_handler (scb->fd, fd_event, scb);
- next_state = FD_SCHEDULED;
- }
- else
- next_state = scb->async_state;
- break;
- }
- if (serial_debug_p (scb))
- {
- switch (next_state)
- {
- case FD_SCHEDULED:
- if (scb->async_state != FD_SCHEDULED)
- fprintf_unfiltered (gdb_stdlog, "[fd%d->fd-scheduled]\n",
- scb->fd);
- break;
- default: /* TIMER SCHEDULED */
- if (scb->async_state == FD_SCHEDULED)
- fprintf_unfiltered (gdb_stdlog, "[fd%d->timer-scheduled]\n",
- scb->fd);
- break;
- }
- }
- scb->async_state = next_state;
- }
-}
-
-/* FD_EVENT: This is scheduled when the input FIFO is empty (and there
- is no pending error). As soon as data arrives, it is read into the
- input FIFO and the client notified. The client should then drain
- the FIFO using readchar(). If the FIFO isn't immediatly emptied,
- push_event() is used to nag the client until it is. */
-
-static void
-fd_event (int error, void *context)
-{
- struct serial *scb = context;
- if (error != 0)
- {
- scb->bufcnt = SERIAL_ERROR;
- }
- else if (scb->bufcnt == 0)
- {
- /* Prime the input FIFO. The readchar() function is used to
- pull characters out of the buffer. See also
- generic_readchar(). */
- int nr;
- do
- {
- nr = read (scb->fd, scb->buf, BUFSIZ);
- }
- while (nr == -1 && errno == EINTR);
- if (nr == 0)
- {
- scb->bufcnt = SERIAL_EOF;
- }
- else if (nr > 0)
- {
- scb->bufcnt = nr;
- scb->bufp = scb->buf;
- }
- else
- {
- scb->bufcnt = SERIAL_ERROR;
- }
- }
- scb->async_handler (scb, scb->async_context);
- reschedule (scb);
-}
-
-/* PUSH_EVENT: The input FIFO is non-empty (or there is a pending
- error). Nag the client until all the data has been read. In the
- case of errors, the client will need to close or de-async the
- device before naging stops. */
-
-static void
-push_event (void *context)
-{
- struct serial *scb = context;
- scb->async_state = NOTHING_SCHEDULED; /* Timers are one-off */
- scb->async_handler (scb, scb->async_context);
- /* re-schedule */
- reschedule (scb);
-}
-
-/* Put the SERIAL device into/out-of ASYNC mode. */
-
-void
-ser_unix_async (struct serial *scb,
- int async_p)
-{
- if (async_p)
- {
- /* Force a re-schedule. */
- scb->async_state = NOTHING_SCHEDULED;
- if (serial_debug_p (scb))
- fprintf_unfiltered (gdb_stdlog, "[fd%d->asynchronous]\n",
- scb->fd);
- reschedule (scb);
- }
- else
- {
- if (serial_debug_p (scb))
- fprintf_unfiltered (gdb_stdlog, "[fd%d->synchronous]\n",
- scb->fd);
- /* De-schedule whatever tasks are currently scheduled. */
- switch (scb->async_state)
- {
- case FD_SCHEDULED:
- delete_file_handler (scb->fd);
- break;
- case NOTHING_SCHEDULED:
- break;
- default: /* TIMER SCHEDULED */
- delete_timer (scb->async_state);
- break;
- }
- }
-}
-
void
_initialize_ser_hardwire (void)
{