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Overview |
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Quick Info
Windows NT
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| Win95
| No
| Win32s
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| Import Library
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| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
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HasOverlappedIoCompleted
[New - Windows NT]
The HasOverlappedIoCompleted macro provides a high performance test operation that can be used to poll for
the completion of an outstanding I/O operation.
BOOL HasOverlappedIoCompleted(
LPOVERLAPPED lpOverlapped
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Parameters
lpOverlapped
Points 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
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.
The HasOverlappedIoCompleted macro is defined as follows:
#define HasOverlappedIoCompleted(lpOverlapped) \
((lpOverlapped)->Internal != STATUS_PENDING)
See Also
CancelIo, ConnectNamedPipe, DeviceIoControl, OVERLAPPED, ReadFile, TransactNamedPipe, WaitCommEvent, WriteFile
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