shmem_barrier_all(3)

NAME
     barrier, shmem_barrier_all - Registers the arrival of a processing
     element (PE) at a barrier and suspends PE execution until all other
     PEs arrive at the barrier

SYNOPSIS
     C or C++:

        void barrier(void);

        void shmem_barrier_all(void);

     Fortran:

        CALL BARRIER

        CALL SHMEM_BARRIER_ALL

DESCRIPTION
     The shmem_barrier_all function registers the arrival of a PE at a
     barrier.  Barriers are a fast mechanism for synchronizing all PEs at
     once.  This routine causes a PE to suspend execution until all PEs
     have called either shmem_barrier_all or set_barrier(3C). This function
     must be used with PEs started by start_pes(3).

     Prior to synchronizing with other PEs, shmem_barrier_all ensures
     completion of all previously issued local memory stores and remote
     memory updates issued via shared memory routine calls such as
     shmem_put32(3).

EXAMPLES
          setup_data()
          {
               if (_my_pe() == 0) {
                   setup();
               }

               /*
                * Force all tasks to wait for PE 0 to complete
                * routine setup().
                */

               shmem_barrier_all();
          }

SEE ALSO
     set_barrier(3C), shmem_barrier(3), start_pes(3), test_barrier(3C),
     wait_barrier(3C)