Function calls

omp_get_num_threads()

return current number of threads

omp_get_max_threads()

return number of threads

omp_get_thread_num()

get current thread number

These calls should be enclosed with the C$ conditional compilation directive, or in a #ifdef _OPENMP, in order to avoid link errors when compiling on a non-OpenMP compiler. eg

       myid = 0
C$     myid = mp_get_thread_num()