Program x06aafe

!     X06AAF Example Program Text

!     Mark 27.3 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: x06aaf, x06abf, x06acf
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nout = 6
!     .. Local Scalars ..
      Integer                          :: ifail, num, num_max, num_set
!     .. Executable Statements ..
      Write (nout,*) 'X06AAF Example Program Results'
      Write (nout,*)

      ifail = 0
      num_set = 5

!     Set the OpenMP Internal Control Variable (ICV) controlling the number
!     of threads
      Call x06aaf(num_set,ifail)

!     Retrieve the value of the ICV, and display it
      num_max = x06acf()
      Write (nout,99999) 'Value of ICV controlling the number of threads:',    &
        num_max
      Write (nout,*)

!     Display the number of threads in the current team
      num = x06abf()
      Write (nout,99999) 'Number of threads outside the parallel region: ',    &
        num
      Write (nout,*)

!     Spawn an OpenMP parallel region and have the master thread display
!     the number of threads in the current team

      !$Omp Parallel Private (num), Default (None)

        num = x06abf()

        !$Omp Master
          Write (nout,99999) 'Number of threads inside the parallel region: ', &
            num
          Write (nout,*)
        !$Omp End Master

      !$Omp End Parallel

99999 Format (1X,A,I5)

    End Program x06aafe