Runs program on specific CPU core on Windows using SetProcessAffinityMask

Affinity.cc

#include <Windows.h>

#include <ctime>
#include <iostream>

using namespace std;

int main(int argc, char* argv[])
{
    HANDLE process = GetCurrentProcess();

    const int num_cores = 8;
    const int interval  = 5000;

    for (int i = 0; i < num_cores; ++i)
    {
        DWORD_PTR mask    = 1 << i;
        BOOL      success = SetProcessAffinityMask(process, mask);
        if (!success)
        {
            cout << "Failed!" << endl;
            return 1;
        }

        cout << i << " started" << endl;

        clock_t start   = clock();
        int     garbage = 0;
        while (clock() - start < interval)
            ;

        cout << i << " ended" << endl;
    }

    return 0;
}