client service returns the ACMSDI_PENDING status. If a status other than ACMSDI_PENDING is returned, the completion routine is not called.

If nonblocking calls are active, use the acmsdi_dispatch_message service to poll for responses from the TP Desktop Connector gateway. When a response is received, acmsdi_dispatch_message calls the appropriate customer-supplied completion routine. If the desktop client program supplies the completion_ status parameter on the initial TP Desktop Connector client service call, the TP Desktop Connector client services set the completion_status to the final completion status for the service and immediately call the completion routine. See Compaq TP Desktop Connector for ACMS Client Application Programming Guide for descriptions and examples.

The forced nonblocking services extend the portable API to support both exchange steps and nonblocking execution of task calls for development tools that do not support pointer data types or whose memory management routines relocate data. You can specify a forced nonblocking session with the acmsdi_ sign_in service by using the ACMSDI_OPTION, ACMSDI_OPT_NONBLK. Do not specify a completion routine in a forced nonblocking session as this will result in an error. See Chapter 4 for more information.

2.3.1 Nonblocking and Blocking Restriction

All calls using the same desktop client program and TP Desktop Connector gateway connection must be either blocking, nonblocking, or forced nonblocking. These types of service calls cannot be mixed for a desktop client program and TP Desktop Connector gateway pair. See Table 1–5 for the list of service calls available for each type of session. If a desktop client program connects to two different TP Desktop Connector gateways, it can mix service call types, using blocking calls to interact with one TP Desktop Connector gateway and nonblocking calls to interact with the other TP Desktop Connector gateway.

2.3.2 Completion Routine Format

For nonblocking service requests, the acmsdi_dispatch_message service calls the customer-supplied completion routine when a response is received from the TP Desktop Connector gateway. The completion routine has the following format:

void completion_routine (call_context)

Parameters

TP Desktop Connector Portable API Client Services 2–3

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Compaq AAPVNFGTE manual Nonblocking and Blocking Restriction, Completion Routine Format, Parameters
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