Releases the specified I/O completion object.
void CloseThreadpoolIo( PTP_IO pio );
A TP_IO structure that defines the I/O completion object. The CreateThreadpoolIo function returns this structure.
This function does not return a value.
The I/O completion object is freed immediately if there are no outstanding callbacks; otherwise, the I/O completion object is freed asynchronously after the outstanding callbacks complete.
You should close the associated file handle and wait for all outstanding overlapped I/O operations to complete before calling this function—you must not cause any more overlapped I/O operations to occur after calling this function.
It may be necessary to cancel threadpool I/O notifications to prevent memory leaks. For more information, see CancelThreadpoolIo.
To compile an application that uses this function, define _WIN32_WINNT as 0x0600 or higher.
|Minimum supported client||Windows Vista [desktop apps | UWP apps]|
|Minimum supported server||Windows Server 2008 [desktop apps | UWP apps]|
|Header||threadpoolapiset.h (include Windows 7, Windows Server 2008 Windows Server 2008 R2, Windows.h)|