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Until the MPI Forum decides to add the persistent collective communication request feature to the MPI Standard, these functions are supported through MPI extensions with the `MPIX_` prefix. Only C bindings are supported currently. Signed-off-by: KAWASHIMA Takahiro <t-kawashima@jp.fujitsu.com>
Copyright (c) 2018 FUJITSU LIMITED. All rights reserved. $COPYRIGHT$ This extension provides the feature of persistent collective communication operations and persistent neighborhood collective communication operations, which is proposed in the MPI Forum as of June 2018. See MPIX_Barrier_init(3) for more details. The code will be moved to the ompi/mpi directory and the MPIX_ prefix will be switch to the MPI_ prefix once the MPI Standard which includes this feature is published.