#include <stdio.h>
#include <string.h>
#include <time.h>
#include "broadcast.h"

int main(int argc, char *argv[])
{
    char msg[20];
    int myrank;
    int tag = 99;
    clock_t begin, end;
    double time_spent;
    MPI_Status status;

    MPI_Init(&argc, &argv);

    MPI_Comm_rank(MPI_COMM_WORLD, &myrank);

    if (myrank == 0) 
    {
        strcpy(msg, "Hello world");
        begin = clock();
        MYMPI_Bcast(msg, 20, MPI_CHAR, 0, MPI_COMM_WORLD);
        MPI_Barrier(MPI_COMM_WORLD);
        end = clock();
        time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
        printf("exec time norm: %f", time_spent);

        // --------------------

        begin = clock();
        MYMPI_Bcast_(msg, 20, MPI_CHAR, 0, MPI_COMM_WORLD);
        MPI_Barrier(MPI_COMM_WORLD);
        end = clock();
        time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
        printf("exec time opt: %f", time_spent);
    }
    else 
    {
        MYMPI_Bcast(msg, 20, MPI_CHAR, 0, MPI_COMM_WORLD);
        MPI_Barrier(MPI_COMM_WORLD);
        //printf("%d: %s\n", myrank, msg);

        MYMPI_Bcast_(msg, 20, MPI_CHAR, 0, MPI_COMM_WORLD);
        MPI_Barrier(MPI_COMM_WORLD);
    }

    MPI_Finalize();

    return 0;
}