Returns an integer indicating the backends loaded successfully.  
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Returns an integer indicating the backends loaded successfully. 
The number returned denotes the backends available according to the table:
| Return Value | Backends Available | 
| 0 | None | 
| 1 | CPU | 
| 2 | CUDA | 
| 3 | CPU and CUDA | 
| 4 | OpenCL | 
| 5 | CPU and OpenCL | 
| 6 | CUDA and OpenCL | 
| 7 | CPU, CUDA and OpenCL | 
      
        
          | AFAPI af_err af_get_available_backends | ( | int * | backends | ) |  | 
      
 
- Parameters
- 
  
    | [out] | backends | is the OR sum of the backends available. |  
 
- Returns
- af_err error code 
 
 
      
        
          | AFAPI int af::getAvailableBackends | ( |  | ) |  | 
      
 
- Returns
- OR sum of the backends available