ExReleaseSpinLockSharedFromDpcLevel function (wdm.h)

The ExReleaseSpinLockSharedFromDpcLevel routine releases a spin lock that the caller acquired for shared access, and leaves the IRQL unchanged.

Syntax

C++

void ExReleaseSpinLockSharedFromDpcLevel(
  PEX_SPIN_LOCK SpinLock
);

Parameters

SpinLock

[in, out] A pointer to the spin lock to release. The caller must own this spin lock for shared access.

Return value

None

Remarks

On entry to this routine, the caller must be running at IRQL >= DISPATCH_LEVEL. This routine does not change the IRQL.

ExReleaseSpinLockSharedFromDpcLevel releases a spin lock that the caller acquired in a previous call to the ExAcquireSpinLockSharedAtDpcLevel routine.

The caller should hold the spin lock only briefly before releasing it. For more information, see Introduction to Spin Locks.

Requirements

Requirement	Value
Header	wdm.h
IRQL	IRQL >= DISPATCH_LEVEL

See also

ExAcquireSpinLockSharedAtDpcLevel