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+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2013 CERN
+ * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
+ *
+ * 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 2
+ * 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, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+/**
+ * @file profile.h:
+ * @brief Simple profiling functions for measuring code execution time.
+ */
+
+#ifndef __TPROFILE_H
+#define __TPROFILE_H
+
+#include <sys/time.h>
+#include <stdint.h>
+
+/**
+ * Function get_tics
+ * Returns the number of microseconds that have elapsed since the system was started.
+ * @return uint64_t Number of microseconds.
+ */
+static inline uint64_t get_tics()
+{
+    struct timeval tv;
+    gettimeofday( &tv, NULL );
+
+    return (uint64_t) tv.tv_sec * 1000000ULL + (uint64_t) tv.tv_usec;
+}
+
+/**
+ * Structure for storing data related to profiling counters.
+ */
+struct prof_counter
+{
+    uint64_t start, end;         // Stored timer value
+
+    uint64_t usecs() const
+    {
+        return end - start;
+    }
+
+    float msecs() const
+    {
+        return ( end - start ) / 1000.0;
+    }
+};
+
+/**
+ * Function prof_start
+ * Begins code execution time counting for a given profiling counter.
+ * @param aCnt is the counter which should be started.
+ * use_rdtsc tells if processor's time-stamp counter should be used for time counting.
+ *      Otherwise is system tics method will be used. IMPORTANT: time-stamp counter should not
+ *      be used on multicore machines executing threaded code.
+ */
+static inline void prof_start( prof_counter* aCnt )
+{
+    aCnt->start = get_tics();
+}
+
+/**
+ * Function prof_stop
+ * Ends code execution time counting for a given profiling counter.
+ * @param aCnt is the counter which should be stopped.
+ */
+static inline void prof_end( prof_counter* aCnt )
+{
+    aCnt->end = get_tics();
+}
+
+#endif