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ExReleaseRundownProtectionEx routine

The ExReleaseRundownProtectionEx routine releases run-down protection that the caller previously acquired by calling the ExAcquireRundownProtectionEx routine.

Syntax


VOID ExReleaseRundownProtectionEx(
  _Inout_  PEX_RUNDOWN_REF RunRef,
  _In_     ULONG Count
);

Parameters

RunRef [in, out]

A pointer to an EX_RUNDOWN_REF structure that was initialized by a previous call to the ExInitializeRundownProtection routine. The run-down protection routines use this structure to track the run-down status of the associated shared object. This structure is opaque to drivers.

Count [in]

The amount by which to decrement to the run-down instance count of the object. For more information, see Remarks.

Return value

None.

Remarks

The RunRef parameter points to an EX_RUNDOWN_REF structure that tracks the run-down status of the associated object. This status information includes a count of the instances of run-down protection that are currently in effect on the object. The ExAcquireRundownProtectionEx and ExReleaseRundownProtectionEx routines increment and decrement this count by arbitrary amounts. Two related routines, ExAcquireRundownProtection and ExReleaseRundownProtection, increment and decrement this count by one.

For more information, see Run-Down Protection.

Requirements

Version

Available starting with Windows Server 2003.

Header

Wdm.h (include Wdm.h)

Library

Ntoskrnl.lib

IRQL

<= APC_LEVEL

DDI compliance rules

HwStorPortProhibitedDDIs

See also

ExAcquireRundownProtection
ExAcquireRundownProtectionEx
ExInitializeRundownProtection
ExReleaseRundownProtection
EX_RUNDOWN_REF

 

 

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