trace.cpp

#include "trace.h"
#include <chrono>
#include <iomanip>
#include <iostream>

class TimeTraceImpl
{
public:
    TimeTraceImpl(const char* func) : func(func) { start = std::chrono::steady_clock::now(); }

    ~TimeTraceImpl()
    {
	end = std::chrono::steady_clock::now();
	uint64_t elapsed = std::chrono::duration_cast<std::chrono::microseconds>(end - start).count();
	std::cerr << "Time for " << func << " " << std::fixed << std::setprecision(3) << elapsed / 1000.0
	          << " ms" << std::endl;
    }

private:
    std::chrono::time_point<std::chrono::steady_clock> start, end;
    const char*                                        func;
};

void TimeTrace::createImpl(const char* func)
{
    impl = new TimeTraceImpl(func);
}

void TimeTrace::destroyImpl()
{
    delete impl;
}

void trace(const char* file, int line, const char* func)
{
    std::cerr << file << ":" << line << "::" << func << std::endl;
}