#include <iostream>
#include <list>
#include <thread>
#include <dcmtk/dcmdata/dcdeftag.h>
#include <dcmtk/dcmdata/dcdicdir.h>

void test()
{
    for (unsigned int i = 0; i < 100000; ++i)
    {
        const DcmTag tag(DCM_AccessionNumber);
        tag.getVR();
    }
}

int main (int argc, char** argv)
{
    const unsigned int numberOfThreads = 50;
    std::list<std::thread> threads;
    for (unsigned int i = 0; i < numberOfThreads; ++i)
        threads.push_back(std::thread(test));
    for (std::thread& thread: threads)
        thread.join();
    return EXIT_SUCCESS;
}