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diff --git a/src/FbTk/FbTime.hh b/src/FbTk/FbTime.hh
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+// FbTime.hh for FbTk - Fluxbox Toolkit
+// Copyright (c) 2012 Mathias Gumz (akira at fluxbox dot org)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+#ifndef FBTK_FBTIME_HH
+#define FBTK_FBTIME_HH
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif // HAVE_CONFIG_H
+
+
+#ifdef HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif // HAVE_INTTYPES_H
+
+namespace FbTk {
+
+// time in micro-seconds, monotonic increasing
+//
+// interesting links:
+//
+// http://www.python.org/dev/peps/pep-0418/#operating-system-time-functions
+// http://en.cppreference.com/w/cpp/chrono
+
+namespace FbTime {
+
+    const uint64_t IN_MILLISECONDS =  1000L;
+    const uint64_t IN_SECONDS = 1000L * 1000L;
+
+    uint64_t now();
+
+    // calculates the remaining microseconds up to the next full 'unit'
+    uint64_t remainingNext(uint64_t unit);
+
+} // namespace FbTime
+
+} // namespace FbTk
+
+#endif // FBTK_TIME_HH