iio_widget: add iio_widget_update_value()

Add an API to only update the gui value of a specific widget. This is useful when we have to do the actual attribute reading before we need to update the GUI. In the next patch, we'll introduce an user of this API. Signed-off-by: Nuno Sa <[email protected]>
analogdevicesinc · Jun 6, 2024 · 4ceed02 · 4ceed02
1 parent fdb2f83
commit 4ceed02
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diff --git a/iio_widget.c b/iio_widget.c
@@ -495,6 +495,18 @@ static gboolean iio_widget_signal_unblock(gpointer arg)
 	return FALSE;
 }
 
+void iio_widget_update_value(struct iio_widget *widget, const char *ensm, size_t len)
+{
+	guint sig = 0;
+
+	if (widget->sig_handler_data)
+		sig = g_signal_handlers_block_matched(G_OBJECT(widget->widget), G_SIGNAL_MATCH_DATA,
+						      0, 0, NULL, NULL, widget->sig_handler_data);
+	widget->update_value(widget, ensm, len);
+
+	if (sig)
+		g_timeout_add(1, (GSourceFunc)iio_widget_signal_unblock, widget);
+}
 /*
 * The point of these is that when we update a widget, we can receive a different value from the
 * iio dev from the one in the GUI (eg: a failed call to widget->save() or an autonomous update).

diff --git a/iio_widget.h b/iio_widget.h
@@ -44,6 +44,7 @@ void iio_make_widget_update_signal_based(struct iio_widget *widget, GCallback ha
 void iio_update_widgets(struct iio_widget *widgets, unsigned int num_widgets);
 void iio_update_widgets_block_signals_by_data(struct iio_widget *widgets, unsigned int num_widgets);
 void iio_widget_update(struct iio_widget *widget);
+void iio_widget_update_value(struct iio_widget *widget, const char *ensm, size_t len);
 void iio_update_widgets_of_device(struct iio_widget *widgets,
 		unsigned int num_widgets, struct iio_device *dev);
 void iio_widget_update_block_signals_by_data(struct iio_widget *widget);