Get the number of backends whose libraries were successfully loaded.  
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Get the number of backends whose libraries were successfully loaded. 
This will be between 0-3. 0 Being no backends were loaded and 3 being all backends loaded successfully.
§ af_get_backend_count()
      
        
          | AFAPI af_err af_get_backend_count | ( | unsigned * | num_backends | ) |  | 
      
 
- Parameters
- 
  
    | [out] | num_backends | Number of available backends |  
 
- Returns
- af_err error code 
 
 
§ getBackendCount()
      
        
          | AFAPI unsigned af::getBackendCount | ( |  | ) |  | 
      
 
- Returns
- Number of available backends