profiler.cpp

#include "profiler.hpp"

#include <cstdio>

profiler::profiler(const std::string& name) : name(name)
{
}

profiler::~profiler()
{
    const auto frequency = SDL_GetPerformanceFrequency();
    const auto duration = static_cast<double>(performanceCounter) / static_cast<double>(frequency);
    const auto average = runCounter ? 1000.0 * duration / static_cast<double>(runCounter) : 0.0f;
    const auto longestMillis = 1000 * longest / frequency;
    printf("[%s] Duration %f s, run counter %" SDL_PRIu64 ", average %f ms, longest %" SDL_PRIu64 " ms\n",
           name.c_str(), duration, runCounter, average, longestMillis);
}

void profiler::start()
{
    started = SDL_GetPerformanceCounter();
}

void profiler::stop()
{
    const auto finished = SDL_GetPerformanceCounter();
    const auto duration = finished - started;
    performanceCounter += duration;
    runCounter++;
    if (duration > longest) {
        longest = duration;
    }
}