#include <omp.h>

extern "C" int foo( double* output );

int foo(double* output)
{
    int tid;
    int nthreads = 0;
    #pragma omp parallel private(tid)
    {
        tid = omp_get_thread_num();

        if (tid<8)
            output[tid] = 1;
        nthreads = omp_get_num_threads();
    }

    return nthreads;
}