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C******************************************************************************

C FILE: omp_workshare1.f

C DESCRIPTION:

C   OpenMP Example - Loop Work-sharing - Fortran Version

C   In this example, the iterations of a loop are scheduled dynamically

C   across the team of threads.  A thread will perform CHUNK iterations

C   at a time before being scheduled for the next CHUNK of work.

C AUTHOR: Blaise Barney  5/99

C LAST REVISED: 01/09/04

C******************************************************************************

      PROGRAM WORKSHARE1

      INTEGER NTHREADS, TID, OMP_GET_NUM_THREADS,

     +  OMP_GET_THREAD_NUM, N, CHUNKSIZE, CHUNK, I

      PARAMETER (N=100)

      PARAMETER (CHUNKSIZE=10)

      REAL A(N), B(N), C(N)

!     Some initializations

      DO I = 1, N

        A(I) = I * 1.0

        B(I) = A(I)

      ENDDO

      CHUNK = CHUNKSIZE

!$OMP PARALLEL SHARED(A,B,C,NTHREADS,CHUNK) PRIVATE(I,TID)

      TID = OMP_GET_THREAD_NUM()

      IF (TID .EQ. 0) THEN

        NTHREADS = OMP_GET_NUM_THREADS()

        PRINT *, 'Number of threads =', NTHREADS

      END IF

      PRINT *, 'Thread',TID,' starting...'

!$OMP DO SCHEDULE(DYNAMIC,CHUNK)

      DO I = 1, N

        C(I) = A(I) + B(I)

        WRITE(*,100) TID,I,C(I)

 100    FORMAT(' Thread',I2,': C(',I3,')=',F8.2)

      ENDDO

!$OMP END DO NOWAIT

      PRINT *, 'Thread',TID,' done.'

!$OMP END PARALLEL

      END