HP 800 ACSE/Presentation and ROSE Interface Programmer's Guide - Page 44

Step 5: Closing the Communication, Endpoint

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Using ACSE/Presentation Step 5: Closing the Communication Endpoint CAUTION Figure 3-11 Step 5: Closing the Communication Endpoint Finally, both processes use ap_close() to close down the communication endpoint (file descriptor) and A/P environment resources (see Figure 3-11). If the association is still alive when ap_close() is invoked, the association will be aborted by the provider before the communication endpoint is released. When an association is terminated, you can re-use the communication endpoint for a new association. ap_close() is used when there is no further use for the communication endpoint. Resources allocated upon the initial ap_open() will not be released unless an explicit ap_close() call is made for each endpoint or the process is terminated. Close the Association Process A Process B AP Environment A ap_close() ap_close() AP Environment B Initiator Communication Endpoint A 44 Responder Communication Endpoint B Chapter 3

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44
Chapter 3
Using ACSE/Presentation
Step 5: Closing the Communication Endpoint
Step 5: Closing the Communication
Endpoint
Finally, both processes use ap_close() to close down the communication
endpoint (file descriptor) and A/P environment resources (see Figure
3-11). If the association is still alive when ap_close() is invoked, the
association will be aborted by the provider before the communication
endpoint is released.
When an association is terminated, you can re-use the communication
endpoint for a new association. ap_close() is used when there is no
further use for the communication endpoint.
CAUTION
Resources allocated upon the initial ap_open() will not be released unless
an explicit ap_close() call is made for each endpoint or the process is
terminated.
Figure 3-11
Close the Association
Communication
Communication
Endpoint A
Endpoint B
Process A
Process B
AP Environment A
AP Environment B
Initiator
Responder
ap_close()
ap_close()