gcc-4.9/libgomp/testsuite/libgomp.fortran/appendix-a/a.39.1.f90


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

! { dg-do run }

      SUBROUTINE SKIP(ID)
      END SUBROUTINE SKIP
      SUBROUTINE WORK(ID)
      END SUBROUTINE WORK
      PROGRAM A39
        INCLUDE "omp_lib.h"      ! or USE OMP_LIB
        INTEGER(OMP_LOCK_KIND) LCK
        INTEGER ID
        CALL OMP_INIT_LOCK(LCK)
!$OMP PARALLEL SHARED(LCK) PRIVATE(ID)
          ID = OMP_GET_THREAD_NUM()
          CALL OMP_SET_LOCK(LCK)
          PRINT *, "My thread id is ", ID
          CALL OMP_UNSET_LOCK(LCK)
          DO WHILE (.NOT. OMP_TEST_LOCK(LCK))
            CALL SKIP(ID)     ! We do not yet have the lock
                              ! so we must do something else
          END DO
          CALL WORK(ID)       ! We now have the lock
                              ! and can do the work
          CALL OMP_UNSET_LOCK( LCK )
!$OMP END PARALLEL
        CALL OMP_DESTROY_LOCK( LCK )
        END PROGRAM A39