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Start a write operation.
Source position: systhrdh.inc line 21
function IReadWriteSync.BeginWrite: Boolean;  | 
BeginWrite signals the begin of a write operation. This call will block if any other read or write operation is currently in progress. It will resume only after all other read or write operations have finished.
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End a read operation  | 
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End a write operation.  | 
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Start a read operation.  |