| 摘要 |
PROBLEM TO BE SOLVED: To appropriately perform message communication even when a return value of a message is transmitted by a communication protocol different from that in transmission. SOLUTION: A transmission thread and a reception thread are provided in a process for each communication prptocol and, moreover, a return value descriptor table for registering a message having the return value is provided. When the message having the return value is transmitted, an ID of the message is recorded on the return value descriptor table, and is transmitted by a desired communication protocol by using a desired transmission thread. A return message which is transmitted by an arbitrary communication protocol is received by the reception thread corresponding to the communication protocol, is collated to the return value descriptor table, and handed over to the original transmission thread. Since the transmission thread of the original message is different from the reception thread of the return message, it is possible to transmit and receive those original message and return message by different protocols.
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