[patch:MI] Observer for thread-changed

[Nick Roberts <nickrob at snap dot net dot nz>]

This patch is the thread-changed notification for MI using an observer.

No regressions.

-- 
Nick                                           http://www.inet.net.nz/~nickrob


2008-06-09  Nick Roberts  <nickrob@snap.net.nz>

	* mi/mi-interp.c (mi_thread_changed): New static function.
	(mi_interpreter_init): Register mi_thread_changed as thread_changed
	observer .
	* thread.c (thread_command): Notify thread changes using observer.
	* infrun.c (normal_stop): Ditto.
	* mi/mi-main.c (mi_cmd_thread_select): Ditto.
	* Makefile.in (mi-main.o) : Add dependency on observer.h.

2008-06-09  Nick Roberts  <nickrob@snap.net.nz>

	* observer.texi (GDB Observers): New observer for thread_changed.


Index: thread.c
===================================================================
RCS file: /cvs/src/src/gdb/thread.c,v
retrieving revision 1.71
diff -p -u -p -r1.71 thread.c
--- thread.c	6 Jun 2008 00:32:51 -0000	1.71
+++ thread.c	9 Jun 2008 12:13:23 -0000
@@ -740,6 +740,7 @@ thread_command (char *tidstr, int from_t
 
   annotate_thread_changed ();
   gdb_thread_select (uiout, tidstr, NULL);
+  observer_notify_thread_changed ();
 }
 
 /* Print notices when new threads are attached and detached.  */
Index: infrun.c
===================================================================
RCS file: /cvs/src/src/gdb/infrun.c,v
retrieving revision 1.278
diff -p -u -p -r1.278 infrun.c
--- infrun.c	6 Jun 2008 00:33:52 -0000	1.278
+++ infrun.c	9 Jun 2008 12:13:25 -0000
@@ -3605,6 +3605,7 @@ normal_stop (void)
       target_terminal_ours_for_output ();
       printf_filtered (_("[Switching to %s]\n"),
 		       target_pid_to_str (inferior_ptid));
+      observer_notify_thread_changed ();
       annotate_thread_changed ();
       previous_inferior_ptid = inferior_ptid;
     }
Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/Makefile.in,v
retrieving revision 1.1026
diff -p -u -p -r1.1026 Makefile.in
--- Makefile.in	6 Jun 2008 20:58:08 -0000	1.1026
+++ Makefile.in	9 Jun 2008 12:13:28 -0000
@@ -3285,7 +3285,8 @@ mi-main.o: $(srcdir)/mi/mi-main.c $(defs
 	$(gdb_string_h) $(exceptions_h) $(top_h) $(gdbthread_h) $(mi_cmds_h) \
 	$(mi_parse_h) $(mi_getopt_h) $(mi_console_h) $(ui_out_h) $(mi_out_h) \
 	$(interps_h) $(event_loop_h) $(event_top_h) $(gdbcore_h) $(value_h) \
-	$(regcache_h) $(gdb_h) $(frame_h) $(mi_main_h) $(language_h)
+	$(regcache_h) $(gdb_h) $(frame_h) $(mi_main_h) $(language_h) \
+	$(observer_h)
 	$(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-main.c
 mi-out.o: $(srcdir)/mi/mi-out.c $(defs_h) $(ui_out_h) $(mi_out_h)
 	$(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/mi/mi-out.c
Index: mi/mi-interp.c
===================================================================
RCS file: /cvs/src/src/gdb/mi/mi-interp.c,v
retrieving revision 1.30
diff -p -u -p -r1.30 mi-interp.c
--- mi/mi-interp.c	3 May 2008 15:10:42 -0000	1.30
+++ mi/mi-interp.c	9 Jun 2008 12:13:28 -0000
@@ -68,6 +68,7 @@ static void mi_remove_notify_hooks (void
 
 static void mi_new_thread (struct thread_info *t);
 static void mi_thread_exit (struct thread_info *t);
+static void mi_thread_changed (void);
 
 static void *
 mi_interpreter_init (int top_level)
@@ -92,6 +93,7 @@ mi_interpreter_init (int top_level)
     {
       observer_attach_new_thread (mi_new_thread);
       observer_attach_thread_exit (mi_thread_exit);
+      observer_attach_thread_changed (mi_thread_changed);
     }
 
   return mi;
@@ -331,6 +333,27 @@ mi_thread_exit (struct thread_info *t)
   gdb_flush (mi->event_channel);
 }
 
+static void
+mi_thread_changed ()
+{
+  struct mi_interp *mi = top_level_interpreter_data ();
+  struct interp *interp_to_use;
+  struct ui_out *old_uiout, *temp_uiout;
+  int version;
+
+  fprintf_unfiltered (mi->event_channel, "thread-changed");
+  interp_to_use = top_level_interpreter ();
+  old_uiout = uiout;
+  temp_uiout = interp_ui_out (interp_to_use);
+  version = mi_version (temp_uiout);
+  temp_uiout = mi_out_new (version);
+  uiout = temp_uiout;
+  ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid));
+  mi_out_put (uiout, mi->event_channel);
+  uiout = old_uiout;
+  gdb_flush (mi->event_channel);
+}
+
 extern initialize_file_ftype _initialize_mi_interp; /* -Wmissing-prototypes */
 
 void
Index: mi/mi-main.c
===================================================================
RCS file: /cvs/src/src/gdb/mi/mi-main.c,v
retrieving revision 1.115
diff -p -u -p -r1.115 mi-main.c
--- mi/mi-main.c	6 May 2008 21:35:01 -0000	1.115
+++ mi/mi-main.c	9 Jun 2008 12:13:28 -0000
@@ -45,6 +45,7 @@
 #include "frame.h"
 #include "mi-main.h"
 #include "language.h"
+#include "observer.h"
 
 #include <ctype.h>
 #include <sys/time.h>
@@ -241,6 +242,7 @@ mi_cmd_thread_select (char *command, cha
     error ("mi_cmd_thread_select: USAGE: threadnum.");
 
   rc = gdb_thread_select (uiout, argv[0], &mi_error_message);
+  observer_notify_thread_changed ();
 
   if (rc == GDB_RC_FAIL)
     {
Index: doc/observer.texi
===================================================================
RCS file: /cvs/src/src/gdb/doc/observer.texi,v
retrieving revision 1.15
diff -p -u -p -r1.15 observer.texi
--- doc/observer.texi	3 May 2008 15:10:42 -0000	1.15
+++ doc/observer.texi	9 Jun 2008 12:13:28 -0000
@@ -137,3 +137,6 @@ The thread specified by @var{t} has been
 The thread specified by @var{t} has exited.
 @end deftypefun
 
+@deftypefun void thread_changed ()
+A new thread has been selected.
+@end deftypefun