Aw instance callback set
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| Minimum requirements | ||
|---|---|---|
| Added in version 4.1 |
int aw_instance_callback_set (AW_CALLBACK c, void (*callback) (int rc))
Description
Establishes a callback handler for an asynchronous call for the current instance.
Callback
None (returns immediately)
Arguments
- c
- Callback (defined in Aw.h)
- callback
- Pointer to the callback handler. Setting it to NULL deactivates the callback.
Argument attributes
None
Return values
- RC_SUCCESS
- RC_NOT_INITIALIZED
- RC_NO_INSTANCE
- RC_INVALID_ATTRIBUTE
- Not a callback.
Returned attributes
None
Usage
void handle_citizen_result (int rc)
{
if (rc != RC_SUCCESS)
printf ("Citizen manipulation failed (reason %d)\n", rc);
else
puts ("Citizen manipulation succeeded");
}
void change_homepage (int citizen, char *url)
{
int rc;
rc = aw_citizen_attributes_by_number (citizen);
if (rc != RC_SUCCESS)
printf ("Citizen #%d query failed (reason %d)\n", citizen, rc);
else
{
aw_instance_callback_set (AW_CALLBACK_CITIZEN_RESULT, handle_citizen_result);
aw_string_set (AW_CITIZEN_URL, url);
aw_citizen_change ();
}
}