KeAcquireSpinLockRaiseToDpc function (wdm.h)
The KeAcquireSpinLockRaiseToDpc routine is a faster version of the KeAcquireSpinLock routine.
Syntax
KIRQL KeAcquireSpinLockRaiseToDpc(
PKSPIN_LOCK SpinLock
);
Parameters
SpinLock
[in, out] Specifies the spin lock to acquire. The spin lock must already have been initialized by KeInitializeSpinLock.
Return value
KeAcquireSpinLockRaiseToDpc returns the current IRQL at the time the routine is called. This value is passed to KeReleaseSpinLock) when the spin lock is released.
Remarks
The effect of this routine is identical to that of KeAcquireSpinLock. In particular, the acquired spin lock is released by KeReleaseSpinLock. For more information, see the reference page for KeAcquireSpinLock.
Drivers can try to acquire the spin lock without blocking by using KeTryToAcquireSpinLockAtDpcLevel.
For more information about spin locks, see Spin Locks.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 64-bit |
| Header | wdm.h |
| IRQL | <= DISPATCH_LEVEL |
| DDI compliance rules | HwStorPortProhibitedDDIs(storport), Spinlock(kmdf), SpinLock(storport), SpinLock(wdm), SpinlockDpc(kmdf), SpinLockDpc(storport), SpinLockDpc(wdm), SpinlockRelease(kmdf), SpinLockRelease(storport), SpinlockRelease(wdm), SpinLockSafe(wdm) |