SYNTAX

C Syntax

int MPI_Is_thread_main(int* flag)

Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_IS_THREAD_MAIN(FLAG, IERROR)
    LOGICAL FLAG
    INTEGER IERROR

Fortran 2008 Syntax

USE mpi_f08
MPI_Is_thread_main(flag, ierror)
    LOGICAL, INTENT(OUT) :: flag
    INTEGER, OPTIONAL, INTENT(OUT) :: ierror