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const  | Qore::SEEK_CUR = SEEK_CUR | 
|   | Indicates that the offset is from the current position in the file. 
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const  | Qore::SEEK_END = SEEK_END | 
|   | Indicates that the offset is from the end of the file. 
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const  | Qore::SEEK_SET = SEEK_SET | 
|   | Indicates that the offset is from the start of the file. 
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These are the possible values for the whence parameter of the File::lock() and File::lockBlocking() methods