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https://github.com/OpenMP/Examples.git
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50 lines
1.3 KiB
Fortran
50 lines
1.3 KiB
Fortran
! @@name: task_dep.14
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! @@type: F-free
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! @@operation: run
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! @@expect: success
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! @@version: omp_6.0
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program main
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use omp_lib
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integer, parameter :: N_ROWS = 20
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integer, parameter :: N_COLS = 20
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integer, parameter :: NUM_VS = 5
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integer, parameter :: ROWS_PER_TASK = 5
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integer :: h
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integer :: M(0:N_ROWS*N_COLS-1), v(0:N_COLS-1,0:NUM_VS-1)
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integer :: check_value
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M(:) = 1
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v(:,:) = 2
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!$omp parallel single
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do h = 0, NUM_VS-1
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! Generate transparent task to establish dependences
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! between child tasks that don't share the same parent.
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!$omp task depend(inout:h) transparent(omp_impex)
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call my_func(M, v(:,h))
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!$omp end task
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end do
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!$omp end parallel single
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check_value = 2**NUM_VS
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if (any(M /= check_value)) error stop
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contains
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subroutine my_func(M, v)
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integer :: M(0:), v(0:)
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integer :: i,j,k
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do i = 0, N_ROWS-1, ROWS_PER_TASK
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! This task is dependency-ordered with respect to the corresponding
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! task in iteration i generated by other transparent tasks.
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!$omp task depend(inout:M(i*N_COLS))
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do j = 0, ROWS_PER_TASK-1
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do k = 0, N_COLS-1
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M((i+j)*N_COLS+k) = M((i+j)*N_COLS+k) * v(k)
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end do
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end do
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!$omp end task
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end do
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end subroutine
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end program
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