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+/*
+ * The MIT License
+ *
+ * Copyright (C) 2013-2016 Alexander Saprykin <saprykin.spb@gmail.com>
+ *
+ * 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.
+ */
+
+/**
+ * @file ptimeprofiler.h
+ * @brief Time profiler
+ * @author Alexander Saprykin
+ *
+ * #PTimeProfiler acts like a time chronometer: in any moment of time you can
+ * make a time slice to see how much time elapsed since the last slice or timer
+ * start.
+ *
+ * This profiler is useful to gather information about execution time for calls
+ * or parts of the code. It can help to leverage bottle-necks in your code.
+ *
+ * To start using a profiler create a new one with p_time_profiler_new() call
+ * and p_time_profiler_elapsed_usecs() to get elapsed time since the creation.
+ * If you need to reset a profiler use p_time_profiler_reset(). Remove a
+ * profiler with p_time_profiler_free().
+ */
+
+#if !defined (PLIBSYS_H_INSIDE) && !defined (PLIBSYS_COMPILATION)
+#  error "Header files shouldn't be included directly, consider using <plibsys.h> instead."
+#endif
+
+#ifndef PLIBSYS_HEADER_PTIMEPROFILER_H
+#define PLIBSYS_HEADER_PTIMEPROFILER_H
+
+#include <pmacros.h>
+#include <ptypes.h>
+
+P_BEGIN_DECLS
+
+/** Time profiler opaque data structure. */
+typedef struct PTimeProfiler_ PTimeProfiler;
+
+/**
+ * @brief Creates a new #PTimeProfiler object.
+ * @return Pointer to a newly created #PTimeProfiler object.
+ * @since 0.0.1
+ */
+P_LIB_API PTimeProfiler *	p_time_profiler_new		(void);
+
+/**
+ * @brief Resets the #PTimeProfiler's internal counter to zero.
+ * @param profiler Time profiler to reset.
+ * @since 0.0.1
+ *
+ * After a reset the time profiler begins to count elapsed time from that moment
+ * of time.
+ */
+P_LIB_API void			p_time_profiler_reset		(PTimeProfiler *	profiler);
+
+/**
+ * @brief Calculates elapsed time since the last reset or creation.
+ * @param profiler Time profiler to calculate elapsed time for.
+ * @return Microseconds elapsed since the last reset or creation.
+ * @since 0.0.1
+ */
+P_LIB_API puint64		p_time_profiler_elapsed_usecs	(const PTimeProfiler *	profiler);
+
+/**
+ * @brief Frees #PTimeProfiler object.
+ * @param profiler #PTimeProfiler to free.
+ * @since 0.0.1
+ */
+P_LIB_API void			p_time_profiler_free		(PTimeProfiler *	profiler);
+
+P_END_DECLS
+
+#endif /* PLIBSYS_HEADER_PTIMEPROFILER_H */