* Makefile.in (SFILES): Add ser-base.c.

	(ser_base_h): New variable.
	(ser-base.o): New target.
	(ser-pipe.o): Depend on $(ser_base_h).
	(ser-tcp.o): Likewise.
	(ser-unix.o): Likewise.  Do not depend on $(event_loop_h).
	* configure.ac (SER_HARDWIRE): Include ser-base.o where
	appropriate.
	* ser-base.c: New file.
	(push_event): Move from ser-unix.c.
	(fd_event): Likewise.
	(reschedule): Likewise.
	(ser_unix_write): Likewise.
	(ser_unix_nop_flush_output): Likewise.
	(ser_unix_flush_input): Likewise.
	(ser_unix_nop_send_break): Likewise.
	(ser_unix_nop_drain_output): Likewise.
	(ser_unix_nop_raw): Likewise.
	(ser_unix_nop_get_tty_state): Likewise.
	(ser_unix_nop_set_tty_state): Likewise.
	(ser_unix_nop_noflush_set_tty_state): Likewise.
	(ser_unix_nop_print_tty_state): Likewise.
	(ser_unix_nop_setbaudrate): Likewise.
	(ser_unix_nop_setstopbits): Likewise.
	(ser_unix_async): Likewise.
	* ser-base.h: New file.
	* ser-pipe.c (ser-base.h): Include it.
	* ser-tcp.c (ser-base.h): Likewise.
	* ser-unix.h (ser_unix_nop_flush_output): Remove.
	(ser_unix_flush_input): Likewise.
	(ser_unix_nop_send_break): Likewise.
	(ser_unix_nop_raw): Likewise.
	(ser_unix_nop_get_tty_state): Likewise.
	(ser_unix_nop_set_tty_state): Likewise.
	(ser_unix_nop_print_tty_state): Likewise.
	(ser_unix_nop_noflush_set_tty_state): Likewise.
	(ser_unix_nop_setbaudrate): Likewise.
	(ser_unix_nop_setstopbits): Likewise.
	(ser_unix_nop_drain_output): Likewise.
	(ser_unix_wait_for): Likewise.
	(ser_unix_write): Likewise.
	(ser_unix_async): Likewise.
	* ser-unix.c (event-loop.h): Do not include it.
	(push_event): Move to ser-base.c.
	(fd_event): Likewise.
	(reschedule): Likewise.
	(ser_unix_write): Likewise.
	(ser_unix_nop_flush_output): Likewise.
	(ser_unix_flush_input): Likewise.
	(ser_unix_nop_send_break): Likewise.
	(ser_unix_nop_drain_output): Likewise.
	(ser_unix_nop_raw): Likewise.
	(ser_unix_nop_get_tty_state): Likewise.
	(ser_unix_nop_set_tty_state): Likewise.
	(ser_unix_nop_noflush_set_tty_state): Likewise.
	(ser_unix_nop_print_tty_state): Likewise.
	(ser_unix_nop_setbaudrate): Likewise.
	(ser_unix_nop_setstopbits): Likewise.
	(ser_unix_async): Likewise.
	(ser_unix_wait_for): Make it static.
	* configure: Regenerated.

10 files changed, 437 insertions, 323 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 03d5115..6f1d99c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,67 @@
+2005-03-25  Mark Mitchell  <mark@codesourcery.com>
+
+	* Makefile.in (SFILES): Add ser-base.c.
+	(ser_base_h): New variable.
+	(ser-base.o): New target.
+	(ser-pipe.o): Depend on $(ser_base_h).
+	(ser-tcp.o): Likewise.
+	(ser-unix.o): Likewise.  Do not depend on $(event_loop_h).
+	* configure.ac (SER_HARDWIRE): Include ser-base.o where
+	appropriate.
+	* ser-base.c: New file.
+	(push_event): Move from ser-unix.c.
+	(fd_event): Likewise.
+	(reschedule): Likewise.
+	(ser_unix_write): Likewise.
+	(ser_unix_nop_flush_output): Likewise.
+	(ser_unix_flush_input): Likewise.
+	(ser_unix_nop_send_break): Likewise.
+	(ser_unix_nop_drain_output): Likewise.
+	(ser_unix_nop_raw): Likewise.
+	(ser_unix_nop_get_tty_state): Likewise.
+	(ser_unix_nop_set_tty_state): Likewise.
+	(ser_unix_nop_noflush_set_tty_state): Likewise.
+	(ser_unix_nop_print_tty_state): Likewise.
+	(ser_unix_nop_setbaudrate): Likewise.
+	(ser_unix_nop_setstopbits): Likewise.
+	(ser_unix_async): Likewise.
+	* ser-base.h: New file.
+	* ser-pipe.c (ser-base.h): Include it.
+	* ser-tcp.c (ser-base.h): Likewise.
+	* ser-unix.h (ser_unix_nop_flush_output): Remove.
+	(ser_unix_flush_input): Likewise.
+	(ser_unix_nop_send_break): Likewise.
+	(ser_unix_nop_raw): Likewise.
+	(ser_unix_nop_get_tty_state): Likewise.
+	(ser_unix_nop_set_tty_state): Likewise.
+	(ser_unix_nop_print_tty_state): Likewise.
+	(ser_unix_nop_noflush_set_tty_state): Likewise.
+	(ser_unix_nop_setbaudrate): Likewise.
+	(ser_unix_nop_setstopbits): Likewise.
+	(ser_unix_nop_drain_output): Likewise.
+	(ser_unix_wait_for): Likewise.
+	(ser_unix_write): Likewise.
+	(ser_unix_async): Likewise.
+	* ser-unix.c (event-loop.h): Do not include it.
+	(push_event): Move to ser-base.c.
+	(fd_event): Likewise.
+	(reschedule): Likewise.
+	(ser_unix_write): Likewise.
+	(ser_unix_nop_flush_output): Likewise.
+	(ser_unix_flush_input): Likewise.
+	(ser_unix_nop_send_break): Likewise.
+	(ser_unix_nop_drain_output): Likewise.
+	(ser_unix_nop_raw): Likewise.
+	(ser_unix_nop_get_tty_state): Likewise.
+	(ser_unix_nop_set_tty_state): Likewise.
+	(ser_unix_nop_noflush_set_tty_state): Likewise.
+	(ser_unix_nop_print_tty_state): Likewise.
+	(ser_unix_nop_setbaudrate): Likewise.
+	(ser_unix_nop_setstopbits): Likewise.
+	(ser_unix_async): Likewise.
+	(ser_unix_wait_for): Make it static.
+	* configure: Regenerated.
+	
 2005-03-25  Mark Kettenis  <kettenis@gnu.org>
 
 	* dwarf2-frame.h: Update copyrigh year.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index ec044fc..985f852 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -545,7 +545,7 @@ SFILES = ada-exp.y ada-lang.c ada-typeprint.c ada-valprint.c  \
 	regcache.c reggroups.c remote.c remote-fileio.c \
 	scm-exp.c scm-lang.c scm-valprint.c \
 	sentinel-frame.c \
-	serial.c ser-unix.c source.c \
+	serial.c ser-base.c ser-unix.c source.c \
 	stabsread.c stack.c std-regs.c symfile.c symfile-mem.c symmisc.c \
 	symtab.c \
 	target.c thread.c top.c tracepoint.c \
@@ -764,6 +764,7 @@ scm_lang_h = scm-lang.h $(scm_tags_h)
 scm_tags_h = scm-tags.h
 sentinel_frame_h = sentinel-frame.h
 serial_h = serial.h
+ser_base_h = ser-base.h
 ser_unix_h = ser-unix.h
 shnbsd_tdep_h = shnbsd-tdep.h
 sh_tdep_h = sh-tdep.h
@@ -2485,11 +2486,13 @@ sentinel-frame.o: sentinel-frame.c $(defs_h) $(regcache_h) \
 ser-e7kpc.o: ser-e7kpc.c $(defs_h) $(serial_h) $(gdb_string_h)
 ser-go32.o: ser-go32.c $(defs_h) $(gdbcmd_h) $(serial_h) $(gdb_string_h)
 serial.o: serial.c $(defs_h) $(serial_h) $(gdb_string_h) $(gdbcmd_h)
-ser-pipe.o: ser-pipe.c $(defs_h) $(serial_h) $(ser_unix_h) $(gdb_vfork_h) \
+ser-base.o: ser-base.c $(defs_h) $(serial_h) $(ser_base_h) $(event_loop_h)
+ser-pipe.o: ser-pipe.c $(defs_h) $(serial_h) $(ser_base_h) $(ser_unix_h) \
+	$(gdb_vfork_h) $(gdb_string_h)
+ser-tcp.o: ser-tcp.c $(defs_h) $(serial_h) $(ser_base_h) $(ser_unix_h) \
 	$(gdb_string_h)
-ser-tcp.o: ser-tcp.c $(defs_h) $(serial_h) $(ser_unix_h) $(gdb_string_h)
-ser-unix.o: ser-unix.c $(defs_h) $(serial_h) $(ser_unix_h) $(terminal_h) \
-	$(gdb_string_h) $(event_loop_h)
+ser-unix.o: ser-unix.c $(defs_h) $(serial_h) $(ser_base_h) $(ser_unix_h) \
+	$(terminal_h) $(gdb_string_h)
 sh3-rom.o: sh3-rom.c $(defs_h) $(gdbcore_h) $(target_h) $(monitor_h) \
 	$(serial_h) $(srec_h) $(arch_utils_h) $(regcache_h) $(gdb_string_h) \
 	$(sh_tdep_h)
diff --git a/gdb/configure b/gdb/configure
index 49368cc..39af594 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -20016,10 +20016,11 @@ echo "$as_me:$LINENO: result: $gdb_cv_os_cygwin" >&5
 echo "${ECHO_T}$gdb_cv_os_cygwin" >&6
 
 
-SER_HARDWIRE="ser-unix.o ser-pipe.o ser-tcp.o"
+SER_HARDWIRE="ser-base.o ser-unix.o ser-pipe.o ser-tcp.o"
 case ${host} in
   *go32* ) SER_HARDWIRE=ser-go32.o ;;
   *djgpp* ) SER_HARDWIRE=ser-go32.o ;;
+  *mingw32*) SER_HARDWIRE="ser-base.o ser-tcp.o" ;;
 esac
 
 
diff --git a/gdb/configure.ac b/gdb/configure.ac
index 1503a5d..6113b0d 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1170,10 +1170,11 @@ lose
 
 
 dnl Figure out which of the many generic ser-*.c files the _host_ supports.
-SER_HARDWIRE="ser-unix.o ser-pipe.o ser-tcp.o"
+SER_HARDWIRE="ser-base.o ser-unix.o ser-pipe.o ser-tcp.o"
 case ${host} in
   *go32* ) SER_HARDWIRE=ser-go32.o ;;
   *djgpp* ) SER_HARDWIRE=ser-go32.o ;;
+  *mingw32*) SER_HARDWIRE="ser-base.o ser-tcp.o" ;;
 esac
 AC_SUBST(SER_HARDWIRE)
 
diff --git a/gdb/ser-base.c b/gdb/ser-base.c
new file mode 100644
index 0000000..aaf1d76
--- /dev/null
+++ b/gdb/ser-base.c
@@ -0,0 +1,306 @@
+/* Generic serial interface functions.
+
+   Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
+   2003, 2004, 2005 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "defs.h"
+#include "serial.h"
+#include "ser-unix.h"
+#include "event-loop.h"
+
+static timer_handler_func push_event;
+static handler_func fd_event;
+
+/* 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. */
+
+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);
+}
+
+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;
+}
+
+void
+ser_unix_nop_raw (struct serial *scb)
+{
+  return;			/* Always in raw mode */
+}
+
+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;
+}
+
+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! */
+}
+
+/* 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;
+	}
+    }
+}
diff --git a/gdb/ser-base.h b/gdb/ser-base.h
new file mode 100644
index 0000000..bba4f65
--- /dev/null
+++ b/gdb/ser-base.h
@@ -0,0 +1,50 @@
+/* Generic serial interface functions.
+
+   Copyright 2005 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef SER_BASE_H
+#define SER_BASE_H
+
+struct serial;
+struct ui_file;
+
+extern void reschedule (struct serial *scb);
+extern int ser_unix_nop_flush_output (struct serial *scb);
+extern int ser_unix_flush_input (struct serial *scb);
+extern int ser_unix_nop_send_break (struct serial *scb);
+extern void ser_unix_nop_raw (struct serial *scb);
+extern serial_ttystate ser_unix_nop_get_tty_state (struct serial *scb);
+extern int ser_unix_nop_set_tty_state (struct serial *scb,
+				       serial_ttystate ttystate);
+extern void ser_unix_nop_print_tty_state (struct serial *scb,
+					  serial_ttystate ttystate,
+					  struct ui_file *stream);
+extern int ser_unix_nop_noflush_set_tty_state (struct serial *scb,
+					       serial_ttystate new_ttystate,
+					       serial_ttystate old_ttystate);
+extern int ser_unix_nop_setbaudrate (struct serial *scb, int rate);
+extern int ser_unix_nop_setstopbits (struct serial *scb, int rate);
+extern int ser_unix_nop_drain_output (struct serial *scb);
+
+extern int ser_unix_write (struct serial *scb, const char *str, int len);
+
+extern void ser_unix_async (struct serial *scb, int async_p);
+
+#endif
diff --git a/gdb/ser-pipe.c b/gdb/ser-pipe.c
index 3e04973..c5129c7 100644
--- a/gdb/ser-pipe.c
+++ b/gdb/ser-pipe.c
@@ -22,6 +22,7 @@
 
 #include "defs.h"
 #include "serial.h"
+#include "ser-base.h"
 #include "ser-unix.h"
 
 #include "gdb_vfork.h"
diff --git a/gdb/ser-tcp.c b/gdb/ser-tcp.c
index c2e4044..cb9ddd0 100644
--- a/gdb/ser-tcp.c
+++ b/gdb/ser-tcp.c
@@ -21,6 +21,7 @@
 
 #include "defs.h"
 #include "serial.h"
+#include "ser-base.h"
 #include "ser-unix.h"
 
 #include <sys/types.h>
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)
 {
diff --git a/gdb/ser-unix.h b/gdb/ser-unix.h
index 3bdf0bc..5ba01f9 100644
--- a/gdb/ser-unix.h
+++ b/gdb/ser-unix.h
@@ -22,33 +22,6 @@
 #ifndef SER_UNIX_H
 #define SER_UNIX_H
 
-struct serial;
-struct ui_file;
-
-/* Generic UNIX/FD functions */
-
-extern int ser_unix_nop_flush_output (struct serial *scb);
-extern int ser_unix_flush_input (struct serial *scb);
-extern int ser_unix_nop_send_break (struct serial *scb);
-extern void ser_unix_nop_raw (struct serial *scb);
-extern serial_ttystate ser_unix_nop_get_tty_state (struct serial *scb);
-extern int ser_unix_nop_set_tty_state (struct serial *scb,
-				       serial_ttystate ttystate);
-extern void ser_unix_nop_print_tty_state (struct serial *scb,
-					  serial_ttystate ttystate,
-					  struct ui_file *stream);
-extern int ser_unix_nop_noflush_set_tty_state (struct serial *scb,
-					       serial_ttystate new_ttystate,
-					       serial_ttystate old_ttystate);
-extern int ser_unix_nop_setbaudrate (struct serial *scb, int rate);
-extern int ser_unix_nop_setstopbits (struct serial *scb, int rate);
-extern int ser_unix_nop_drain_output (struct serial *scb);
-
-extern int ser_unix_wait_for (struct serial *scb, int timeout);
 extern int ser_unix_readchar (struct serial *scb, int timeout);
 
-extern int ser_unix_write (struct serial *scb, const char *str, int len);
-
-extern void ser_unix_async (struct serial *scb, int async_p);
-
 #endif