Provides a high performance test operation that can be used to poll for the completion of an outstanding I/O operation.

Syntax

BOOL HasOverlappedIoCompleted(
    LPOVERLAPPED lpOverlapped
);

Parameters

lpOverlapped

A pointer to an OVERLAPPED structure that was specified when the overlapped I/O operation was started.

Return Value

Returns TRUE if the I/O operation has completed, and FALSE otherwise.

Remarks

Do not call this macro unless the call to GetLastError returns ERROR_IO_PENDING, indicating that the overlapped I/O has started.

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 or GetQueuedCompletionStatus function.

Requirements

See Also

CancelIo

ConnectNamedPipe

OVERLAPPED

ReadFile

TransactNamedPipe

WaitCommEvent

WriteFile

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Build date: 10/8/2009