Intel 05-2409-003 User Manual

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This chapter describes the programming models supported by Global Call. Topics include: 

The Global Call development software supports application development using asynchronous 
programming models. By usage, the asynchronous models are often said to use asynchronous 
mode. Asynchronous mode programming is introduced briefly in this chapter and described in 
more detail in the Standard Runtime Library API Programming Guide. 

Programming in asynchronous mode in Windows is described in the following topics:

 

 

Asynchronous mode programming is characterized by the calling thread performing other 
processing while a function executes. At completion, the application receives event notification 
from the SRL and then the thread continues processing the call on a particular channel. 

A function called in the asynchronous mode returns control immediately after the request is passed 
to the device driver and allows thread processing to continue. A termination event is returned when 
the requested operation completes, thus allowing the Intel Dialogic operation (state machine 
processing) to continue. 

In general, when a function is called in asynchronous mode, and an associated termination event 
exists, the gc_Close( ) function should not be called until the termination event has been received. 
In order to disable gc_WaitCall( ), gc_ResetLineDev( ) should be called. If this is not done, there 
are potential race conditions under which the application may crash with a segmentation fault.

Functions may be initiated asynchronously from a single thread and/or the completion 
(termination) event can be picked up by the same or a different thread that calls the sr_waitevt( )