| MPI_BARRIER( comm ) | |
| IN comm | communicator (handle) |
int MPI_Barrier(MPI_Comm comm )
MPI_BARRIER(COMM, IERROR)
If comm is an intracommunicator,
MPI_BARRIER 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.
If comm is an intercommunicator, the barrier is
performed across all processes in the intercommunicator.
In this case, all processes in
one group (group A)
of the intercommunicator may exit the barrier when all of the processes in the
other group (group B)
have entered the barrier.
INTEGER COMM, IERROR
void MPI::Comm::Barrier() const = 0
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MPI-2.0 of July 1, 2008
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