Lists the cache usage strategies. 
The cache stores preprocessed camera description xml files providing faster access or smaller footprint. note The environment variable GENICAM_CACHE_VERSION, e.g. GENICAM_CACHE_V3_0, must contain the path to cache directory for using the cache. 
| Enumerator | 
|---|
| CacheUsage_Automatic | The use of cache files is determined automatically.  | 
| CacheUsage_ForceWrite | Forces the loading and preprocessing of the camera description xml file.  If a cache directory is available the result of preprocessing is written to the cache.  | 
| CacheUsage_ForceRead | Suppresses loading and preprocessing of the camera description xml file and.  forces reading a cache file from cache directory. Fails if no matching cache file is available.  | 
| CacheUsage_Ignore | Forces the loading and preprocessing of the camera description xml file.  No cache file is written.  |