5.1. Selecting Advanced SRL Programming Models
This section describes the following advanced SRL programming models:
You can use advanced programming models in applications for which the basic programming models might not apply. Select an advanced programming model according to the criteria shown in Table 2. The sections following this table describe these advanced programming models.
Table 2. Guidelines for Selecting an Advanced Programming Model
Application Requirements |
Recommended Advanced Programming Model |
Threading and Event Handling Considerations |
Few devices Needs to service unsolicited Dialogic events |
Synchronous with SRL Callback (Section 5.2) |
Create a separate thread to execute processing for each Dialogic device, typically a voice channel. Call sr_enbhdlr( ) to enable callback functions that service unsoicited Dialogic events. |
Many devices Multiple tasks Needs user-defined event handlers |
Asynchronous with SRL Callback (Section 5.2) |
For details about how this model dispatches events to your event handlers, see Section 4.1.4. SRL Callback Thread Behavior. |
Many devices Multiple tasks Needs the tightest possible integration with the Windows messaging scheme |
Asynchronous with Windows Callback (Section 5.4) |
Call sr_NotifyEvent( ) to enable event notification to a user-specified window. When the window receives event notification, call sr_waitevt(0) to retrieve the Dialogic event. |
Many devices Multiple tasks Needs the tightest possible integration with other Win32 devices |
Asynchronous with Win32 Synchronization (Section 5.5) |
At application intialization:
Use a Win32 function to wait for event notification. At notification, call the sr_waitevt( ) function to retrieve the event from the Dialogic event queue. |
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Use a Win32 function to create the Reset event or I/O Ccompletion Port.