KeRaiseIrqlToDpcLevel function

The KeRaiseIrqlToDpcLevel routine raises the hardware priority to IRQL = DISPATCH_LEVEL, thereby masking off interrupts of equivalent or lower IRQL on the current processor.

Syntax

_DECL_HAL_KE_IMPORT KIRQL KeRaiseIrqlToDpcLevel(

);

Parameters

This function has no parameters.

Return Value

KeRaiseIrqlToDpcLevel returns the IRQL at which the call occurred.

Remarks

Any caller of KeRaiseIrqlToDpcLevel should save the returned IRQL value. Every such caller must restore the original IRQL as quickly as possible by passing this returned IRQL in a subsequent call to KeLowerIrql.

Callers of KeRaiseIrqlToDpcLevel must be running at IRQL <= DISPATCH_LEVEL. Otherwise, a call to this routine causes a bug check.

Requirements

   
Minimum supported client Available starting with Windows 2000.
Target Platform Universal
Header wdm.h (include Wdm.h, Ntddk.h)
Library Hal.lib
IRQL <= DISPATCH_LEVEL (see Remarks section)
DDI compliance rules HwStorPortProhibitedDDIs

See Also

KeGetCurrentIrql

KeLowerIrql

KeRaiseIrql