perf ui: Introduce generic ui_progress helper

Make ui_progress functions generic so that UI frontend code will add its
callbacks.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1352813436-14173-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/ui/tui/progress.c b/tools/perf/ui/tui/progress.c
index f8dc986..6c2184d 100644
--- a/tools/perf/ui/tui/progress.c
+++ b/tools/perf/ui/tui/progress.c
@@ -4,7 +4,7 @@
 #include "../ui.h"
 #include "../browser.h"
 
-void ui_progress__update(u64 curr, u64 total, const char *title)
+static void tui_progress__update(u64 curr, u64 total, const char *title)
 {
 	int bar, y;
 	/*
@@ -30,3 +30,13 @@
 	SLsmg_refresh();
 	pthread_mutex_unlock(&ui__lock);
 }
+
+static struct ui_progress tui_progress_fns =
+{
+	.update		= tui_progress__update,
+};
+
+void ui_progress__init(void)
+{
+	progress_fns = &tui_progress_fns;
+}