A return code, indicating the completion status of the requested function, is returned by most of the API calls. Return codes are interpreted as follows:

• 0 - Successful completion of the operation.
• 4 - Successful completion, but an unusual condition existed.
• 8 - Error condition detected.
• 12 - Severe error encountered.
• 16 - Termination error.

The __iew_get_return_code() function returns binder API return code which is stored in the API context from previous API call. It is used as an alternative to retrieving the return code from API context.