mirror of
https://github.com/OpenMP/Examples.git
synced 2025-04-10 08:22:11 +01:00
34 lines
776 B
Fortran
34 lines
776 B
Fortran
! @@name: mem_model.4b
|
|
! @@type: F-free
|
|
! @@operation: compile
|
|
! @@expect: success
|
|
! @@version: omp_3.1
|
|
subroutine flush_correct
|
|
use omp_lib
|
|
implicit none
|
|
integer a, b, tmp
|
|
integer myid
|
|
|
|
a = 0; b = 0
|
|
!$omp parallel private(myid,tmp) num_threads(2)
|
|
myid = omp_get_thread_num()
|
|
|
|
if ( myid == 0 ) then ! thread 0
|
|
!$omp atomic write
|
|
b = 1
|
|
!$omp flush(a,b) ! flushes are ordered
|
|
!$omp atomic read
|
|
tmp = a
|
|
else ! thread 1
|
|
!$omp atomic write
|
|
a = 1
|
|
!$omp flush(a,b) ! flushes are ordered
|
|
!$omp atomic read
|
|
tmp = b
|
|
endif
|
|
if ( tmp == 0 ) then ! access by single thread
|
|
!! protected section
|
|
endif
|
|
!$omp end parallel
|
|
end subroutine
|