MPI_Barrier(3)

NAME
     MPI_Barrier - Blocks until all processes have reached the routine at
     which the barrier is placed

SYNOPSIS
     C:

          #include <mpi.h>

          int MPI_Barrier ( comm )
          MPI_Comm comm;


     C++:

          #include <mpi.h>

          void Intracomm::Barrier() const


     Fortran:

          INCLUDE "mpif.h" (or USE MPI)

          INTEGER comm, ierror

          CALL MPI_BARRIER(comm, ierror)


STANDARDS
     This release implements the MPI 1.2 standard, as documented by the MPI
     Forum in the spring 1997 release of MPI:  A Message Passing Interface
     Standard.

DESCRIPTION
     The MPI_Barrier routine blocks until all processes have reached the
     routine at which the barrier is placed.  It blocks the caller until all
     group members have called it; the call returns at any process only after
     all group members have entered the call.  This routine accepts the
     following parameter:

     comm      Specfies the communicator (handle)

     ierror    Specifies the return code value for successful completion,
               which is in MPI_SUCCESS.  MPI_SUCCESS is defined in the mpif.h
               file.