openmp中的依赖部分

#pragma omp parallell sections
{
    #pragma single
    {
        if (....) {
            #pragma section
            {
                a = A(); // <- Takes much more time than B and will be parallellized further within A
            }
            #pragma section
            {
                b = B();
            }
        }
        ...
        #pragma section (dependent on b?)
        for (...) {
            c = C(b);
        }
    }
}