Aw callback
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| Minimum requirements | ||
|---|---|---|
| Added in version 2.1 | ||
| SDK | build 13 | |
void (*aw_callback (AW_CALLBACK c)) (int rc)
Description
Returns the callback handler for an asynchronous call.
Callback
None (returns immediately)
Arguments
- c
- Callback (defined in Aw.h)
Argument attributes
None
Return values
- Pointer
- Pointer to the callback handler.
- NULL
- If no callback handler is installed. Or if the callback was invalid.
Returned attributes
None
Usage
if (aw_callback (AW_CALLBACK_ADDRESS)) printf ("A callback handler is installed for looking up IP addresses\n"); else printf ("No callback handler is installed for looking up IP addresses\n");