From 2aa72b9302f5f0b2fa20c7dec78fdafeb6b07cd9 Mon Sep 17 00:00:00 2001
From: philippegorley <philippe.gorley@savoirfairelinux.com>
Date: Wed, 4 Jul 2018 11:13:55 -0400
Subject: [PATCH] debug: add timer
Adds a Timer object to easily benchmark code.
Should be used only for debugging code, so a warning is issued if the
header is included.
Change-Id: I89bc5454fc0c182a50b14cafd205ee116b4a167e
---
src/debug_utils.h | 56 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
create mode 100644 src/debug_utils.h
diff --git a/src/debug_utils.h b/src/debug_utils.h
new file mode 100644
index 0000000000..b4d3d183e9
--- /dev/null
+++ b/src/debug_utils.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2018 Savoir-faire Linux Inc.
+ *
+ * Author: Philippe Gorley <philippe.gorley@savoirfairelinux.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#pragma once
+
+#include "config.h"
+
+#include <chrono>
+#include <ratio>
+
+#warning Debug utilities included in build
+
+using Clock = std::chrono::steady_clock;
+
+namespace ring { namespace debug {
+
+/**
+ * Ex:
+ * Timer t;
+ * std::this_thread::sleep_for(std::chrono::milliseconds(10));
+ * RING_DBG() << "Task took " << t.getDuration<std::chrono::nanoseconds>() << " ns";
+ */
+class Timer
+{
+public:
+ Timer() { start_ = Clock::now(); }
+
+ template<class Period = std::ratio<1>>
+ uint64_t getDuration()
+ {
+ auto diff = std::chrono::duration_cast<Period>(Clock::now() - start_);
+ return diff.count();
+ }
+
+private:
+ std::chrono::time_point<Clock> start_;
+};
+
+}} // namespace ring::debug
--
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