IoReleaseCancelSpinLock function (wdm.h)
The IoReleaseCancelSpinLock routine releases the cancel spin lock after the driver has changed the cancelable state of an IRP.
Syntax
void IoReleaseCancelSpinLock(
KIRQL Irql
);
Parameters
Irql
[in] The IRQL to be restored. The caller obtained this IRQL in the previous call to the IoAcquireCancelSpinLock routine.
Return value
None
Remarks
This routine is a reciprocal to IoAcquireCancelSpinLock.
This routine also releases the cancel spin lock from the driver's Cancel routine.
The holder of the cancel spin lock runs at IRQL = DISPATCH_LEVEL after calling IoAcquireCancelSpinLock. IoReleaseCancelSpinLock restores the original IRQL of the caller.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 |
| Header | wdm.h |
| IRQL | DISPATCH_LEVEL |
| DDI compliance rules | CancelSpinLock(storport), CancelSpinLock(wdm), CancelSpinlockRelease(wdm), HwStorPortProhibitedDDIs(storport), SpinLockSafe(storport), SpinLockSafe(wdm) |