* src/visualizer.c (hg_memory_visualizer_class_init): added gc-started

	and gc-finished signals.
	(hg_memory_visualizer_notify_gc_state): new function.

	* src/hgspy.c (_hgspy_gc_started_cb): new function.
	(_hgspy_gc_finished_cb): new function.
	(main): added a statusbar.

	* src/hgspy_helper.c (helper_init): watch hg_mem_garbage_collection too.
	(hg_mem_garbage_collection): new function.

4 files changed, 98 insertions, 1 deletions

diff --git a/src/hgspy.c b/src/hgspy.c
index afcffae..3204f89 100644
--- a/src/hgspy.c
+++ b/src/hgspy.c
@@ -40,6 +40,7 @@ typedef struct _HieroGlyphSpy	HgSpy;
 
 struct _HieroGlyphSpy {
 	GtkWidget    *window;
+	GtkWidget    *status;
 	GtkWidget    *visualizer;
 	GtkWidget    *total_vm_size;
 	GtkWidget    *used_vm_size;
@@ -53,6 +54,8 @@ struct _HieroGlyphSpy {
 	gint          error;
 	gchar        *statementedit_buffer;
 	gboolean      destroyed;
+	guint         gc_status_ctxt_id;
+	guint         gc_status_msg_id;
 };
 
 static void _hgspy_update_vm_status(HgMemoryVisualizer *visual,
@@ -510,6 +513,34 @@ _hgspy_draw_updated_cb(HgMemoryVisualizer *visual,
 }
 
 static void
+_hgspy_gc_started_cb(HgMemoryVisualizer *visual,
+		     gpointer            data)
+{
+	HgSpy *spy = data;
+
+	g_return_if_fail (HG_IS_MEMORY_VISUALIZER (visual));
+	g_return_if_fail (data != NULL);
+
+	spy->gc_status_msg_id = gtk_statusbar_push(GTK_STATUSBAR (spy->status),
+						   spy->gc_status_ctxt_id,
+						   _("Collecting the garbages..."));
+}
+
+static void
+_hgspy_gc_finished_cb(HgMemoryVisualizer *visual,
+		     gpointer            data)
+{
+	HgSpy *spy = data;
+
+	g_return_if_fail (HG_IS_MEMORY_VISUALIZER (visual));
+	g_return_if_fail (data != NULL);
+
+	gtk_statusbar_remove(GTK_STATUSBAR (spy->status),
+			     spy->gc_status_ctxt_id,
+			     spy->gc_status_msg_id);
+}
+
+static void
 _hgspy_entry_activate_cb(GtkWidget *widget,
 			 gpointer   data)
 {
@@ -703,6 +734,8 @@ main(int    argc,
 	spy->error = 0;
 	spy->statementedit_buffer = NULL;
 	spy->destroyed = FALSE;
+	spy->gc_status_ctxt_id = 0;
+	spy->gc_status_msg_id = 0;
 
 	actions = gtk_action_group_new("MenuBar");
 	spy->ui = gtk_ui_manager_new();
@@ -717,6 +750,7 @@ main(int    argc,
 	spy->visualizer = ((GtkWidget * (*) (void))__hg_spy_helper_get_widget) ();
 	spy->textview = gtk_text_view_new();
 	spy->entry = gtk_entry_new();
+	spy->status = gtk_statusbar_new();
 
 	if (spy->visualizer == NULL) {
 		g_warning("Failed to initialize a helper module.");
@@ -747,6 +781,8 @@ main(int    argc,
 				       GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 	gtk_text_view_set_editable(GTK_TEXT_VIEW (spy->textview), FALSE);
 	gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW (spy->textview), GTK_WRAP_WORD_CHAR);
+	spy->gc_status_ctxt_id = gtk_statusbar_get_context_id(GTK_STATUSBAR (spy->status),
+							      "Status for GC");
 
 	/* setup accelerators */
 	gtk_window_add_accel_group(GTK_WINDOW (spy->window), gtk_ui_manager_get_accel_group(spy->ui));
@@ -794,7 +830,8 @@ main(int    argc,
 	gtk_box_pack_start(GTK_BOX (vbox2), spy->entry, FALSE, FALSE, 0);
 	gtk_box_pack_start(GTK_BOX (hbox), vbox2, TRUE, TRUE, 0);
 	gtk_box_pack_start(GTK_BOX (hbox), table, FALSE, FALSE, 0);
-	gtk_box_pack_end(GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+	gtk_box_pack_start(GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+	gtk_box_pack_end(GTK_BOX (vbox), spy->status, FALSE, FALSE, 0);
 	gtk_container_add(GTK_CONTAINER (spy->window), vbox);
 
 	/* setup signals */
@@ -802,6 +839,10 @@ main(int    argc,
 			 G_CALLBACK (_hgspy_pool_updated_cb), spy);
 	g_signal_connect(spy->visualizer, "draw-updated",
 			 G_CALLBACK (_hgspy_draw_updated_cb), spy);
+	g_signal_connect(spy->visualizer, "gc-started",
+			 G_CALLBACK (_hgspy_gc_started_cb), spy);
+	g_signal_connect(spy->visualizer, "gc-finished",
+			 G_CALLBACK (_hgspy_gc_finished_cb), spy);
 	g_signal_connect(spy->window, "delete-event",
 			 G_CALLBACK (_hgspy_quit_cb), spy);
 	g_signal_connect(spy->entry, "activate",
diff --git a/src/hgspy_helper.c b/src/hgspy_helper.c
index 8eff821..6a90b14 100644
--- a/src/hgspy_helper.c
+++ b/src/hgspy_helper.c
@@ -37,6 +37,7 @@ static gpointer __hg_mem_pool_add_heap = NULL;
 static gpointer __hg_mem_alloc_with_flags = NULL;
 static gpointer __hg_mem_free = NULL;
 static gpointer __hg_mem_resize = NULL;
+static gpointer __hg_mem_garbage_collection = NULL;
 static GModule *__handle = NULL;
 static GtkWidget *visual = NULL;
 
@@ -72,6 +73,10 @@ helper_init(void)
 		g_warning("Failed g_module_symbol: %s", g_module_error());
 		exit(1);
 	}
+	if (!g_module_symbol(__handle, "hg_mem_garbage_collection", &__hg_mem_garbage_collection)) {
+		g_warning("Failed g_module_symbol: %s", g_module_error());
+		exit(1);
+	}
 	g_type_init();
 	visual = hg_memory_visualizer_new();
 }
@@ -196,6 +201,18 @@ hg_mem_resize(gpointer data,
 	return retval;
 }
 
+gboolean
+hg_mem_garbage_collection(HgMemPool *pool)
+{
+	gboolean retval;
+
+	hg_memory_visualizer_notify_gc_state(HG_MEMORY_VISUALIZER (visual), FALSE);
+	retval = ((gboolean (*) (HgMemPool *))__hg_mem_garbage_collection) (pool);
+	hg_memory_visualizer_notify_gc_state(HG_MEMORY_VISUALIZER (visual), TRUE);
+
+	return retval;
+}
+
 /*
  * Public Functions
  */
diff --git a/src/visualizer.c b/src/visualizer.c
index 6dc41d9..57804c7 100644
--- a/src/visualizer.c
+++ b/src/visualizer.c
@@ -39,6 +39,8 @@ enum {
 enum {
 	POOL_UPDATED,
 	DRAW_UPDATED,
+	GC_STARTED,
+	GC_FINISHED,
 	LAST_SIGNAL
 };
 
@@ -48,6 +50,8 @@ struct _HgMemoryVisualizerClass {
 	void (* pool_updated) (HgMemoryVisualizer *visual,
 			       gpointer            list);
 	void (* draw_updated) (HgMemoryVisualizer *visual);
+	void (* gc_started)   (HgMemoryVisualizer *visual);
+	void (* gc_finished)  (HgMemoryVisualizer *visual);
 };
 
 struct Heap2Offset {
@@ -341,6 +345,20 @@ hg_memory_visualizer_class_init(HgMemoryVisualizerClass *klass)
 					     NULL, NULL,
 					     gtk_marshal_VOID__VOID,
 					     G_TYPE_NONE, 0);
+	signals[GC_STARTED] = g_signal_new("gc-started",
+					   G_OBJECT_CLASS_TYPE (klass),
+					   G_SIGNAL_RUN_FIRST,
+					   G_STRUCT_OFFSET (HgMemoryVisualizerClass, gc_started),
+					   NULL, NULL,
+					   gtk_marshal_VOID__VOID,
+					   G_TYPE_NONE, 0);
+	signals[GC_FINISHED] = g_signal_new("gc-finished",
+					    G_OBJECT_CLASS_TYPE (klass),
+					    G_SIGNAL_RUN_FIRST,
+					    G_STRUCT_OFFSET (HgMemoryVisualizerClass, gc_finished),
+					    NULL, NULL,
+					    gtk_marshal_VOID__VOID,
+					    G_TYPE_NONE, 0);
 }
 
 static void
@@ -806,3 +824,22 @@ hg_memory_visualizer_get_current_pool_name(HgMemoryVisualizer *visual)
 {
 	return visual->current_pool_name;
 }
+
+void
+hg_memory_visualizer_notify_gc_state(HgMemoryVisualizer *visual,
+				     gboolean            is_finished)
+{
+	gdk_threads_enter();
+	if (is_finished)
+		g_signal_emit(visual, signals[GC_FINISHED], 0);
+	else
+		g_signal_emit(visual, signals[GC_STARTED], 0);
+	gdk_threads_leave();
+
+	G_LOCK (visualizer);
+
+	visual->need_update = TRUE;
+	_hg_memory_visualizer_add_idle(visual);
+
+	G_UNLOCK (visualizer);
+}
diff --git a/src/visualizer.h b/src/visualizer.h
index 92223fc..f8e0c3a 100644
--- a/src/visualizer.h
+++ b/src/visualizer.h
@@ -69,6 +69,8 @@ void         hg_memory_visualizer_change_pool          (HgMemoryVisualizer *visu
 gsize        hg_memory_visualizer_get_used_size        (HgMemoryVisualizer *visual,
 							const gchar        *name);
 const gchar *hg_memory_visualizer_get_current_pool_name(HgMemoryVisualizer *visual);
+void         hg_memory_visualizer_notify_gc_state      (HgMemoryVisualizer *visual,
+							gboolean            is_finished);
 
 
 G_END_DECLS