perf ui progress: Per progress bar state

That will ease using a progress bar across multiple functions, like in
the upcoming patches that will present a progress bar when collapsing
histograms.

Based on a previous patch by Namhyung Kim.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-cr7lq7ud9fj21bg7wvq27w1u@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 17 insertions, 5 deletions

diff --git a/tools/perf/ui/progress.c b/tools/perf/ui/progress.c
index d753821b6e0b..a0f24c7115c5 100644
--- a/tools/perf/ui/progress.c
+++ b/tools/perf/ui/progress.c
@@ -1,9 +1,7 @@
 #include "../cache.h"
 #include "progress.h"
 
-static void null_progress__update(u64 curr __maybe_unused,
-				  u64 total __maybe_unused,
-				  const char *title __maybe_unused)
+static void null_progress__update(struct ui_progress *p __maybe_unused)
 {
 }
 
@@ -14,9 +12,23 @@ static struct ui_progress_ops null_progress__ops =
 
 struct ui_progress_ops *ui_progress__ops = &null_progress__ops;
 
-void ui_progress__update(u64 curr, u64 total, const char *title)
+void ui_progress__update(struct ui_progress *p, u64 adv)
 {
-	return ui_progress__ops->update(curr, total, title);
+	p->curr += adv;
+
+	if (p->curr >= p->next) {
+		p->next += p->step;
+		ui_progress__ops->update(p);
+	}
+}
+
+void ui_progress__init(struct ui_progress *p, u64 total, const char *title)
+{
+	p->curr = 0;
+	p->next = p->step = total / 16;
+	p->total = total;
+	p->title = title;
+
 }
 
 void ui_progress__finish(void)