Blocking probe for incoming messages — caller reads
status%MPI_SOURCE / status%MPI_TAG to dispatch the matching
recv. Mirrors the f08 backend’s comm_probe.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| type(comm_t), | intent(in) | :: | comm | |||
| integer(kind=int32), | intent(in) | :: | source | |||
| integer(kind=int32), | intent(in) | :: | tag | |||
| type(MPI_Status), | intent(out) | :: | status |