The HasOverlappedIoCompleted macro provides a high performance test
operation that can be used to poll for the completion of an outstanding I/O
Points to an OVERLAPPED structure that
was specified when the overlapped I/O operation was started.
Returns TRUE if the I/O operation has completed, and FALSE otherwise.
To cancel all pending asynchronous I/O operations, use the CancelIo
function. This function only cancels operations issued by the calling thread
for the specified file handle. I/O operations that are canceled complete with
the error ERROR_OPERATION_ABORTED.
To get more details about a completed I/O operation, call the GetOverlappedResult
The HasOverlappedIoCompleted macro is defined as follows:
#define HasOverlappedIoCompleted(lpOverlapped) \
((lpOverlapped)->Internal != STATUS_PENDING)
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