qt-everywhere-src-5.15.1/qt3d/src/3rdparty/assimp/code/Profiler.h

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

Copyright (c) 2006-2017, assimp team

All rights reserved.

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  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
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  following disclaimer in the documentation and/or other
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* Neither the name of the assimp team, nor the names of its
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  derived from this software without specific prior
  written permission of the assimp team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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*/

/** @file Profiler.h
 *  @brief Utility to measure the respective runtime of each import step
 */
#ifndef INCLUDED_PROFILER_H
#define INCLUDED_PROFILER_H

#include <chrono>
#include <assimp/DefaultLogger.hpp>
#include "TinyFormatter.h"

#include <map>

namespace Assimp {
namespace Profiling {

using namespace Formatter;

// ------------------------------------------------------------------------------------------------
/** Simple wrapper around boost::timer to simplify reporting. Timings are automatically
 *  dumped to the log file.
 */
class Profiler {
public:
    Profiler() {
        // empty
    }

public:

    /** Start a named timer */
    void BeginRegion(const std::string& region) {
        regions[region] = std::chrono::system_clock::now();
        DefaultLogger::get()->debug((format("START `"),region,"`"));
    }


    /** End a specific named timer and write its end time to the log */
    void EndRegion(const std::string& region) {
        RegionMap::const_iterator it = regions.find(region);
        if (it == regions.end()) {
            return;
        }

        std::chrono::duration<double> elapsedSeconds = std::chrono::system_clock::now() - regions[region];
        DefaultLogger::get()->debug((format("END   `"),region,"`, dt= ", elapsedSeconds.count()," s"));
    }

private:
    typedef std::map<std::string,std::chrono::time_point<std::chrono::system_clock>> RegionMap;
    RegionMap regions;
};

}
}

#endif