OpenTP1 Version 7 TP1/Client User's Guide TP1/Client/W, TP1/Client/P
The CUP issues the dc_trn_begin_s function to start a transaction.
The range of a global transaction is from issuing the dc_trn_begin_s function to acquisition of a synchronous point (commit).
Once the dc_trn_begin_s function has been issued, another issuance of that function is unavailable within the global transaction.
If an RPC is executed from the CUP to an SPP, the CUP becomes a route transaction branch and the SPP a transaction branch.
The following figure shows the relation between transactions and RPCs.
Figure 2-9 Relationship between transactions and RPCs
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