ExGetExclusiveWaiterCount function (wdm.h)

Article
02/22/2024

The ExGetExclusiveWaiterCount routine returns the number of waiters on exclusive access to a given resource.

Syntax

ULONG ExGetExclusiveWaiterCount(
  [in] PERESOURCE Resource
);

Parameters

[in] Resource

A pointer to the resource to be tested.

Return value

ExGetExclusiveWaiterCount returns the number of threads currently waiting to acquire the given resource for exclusive access.

Remarks

ExGetExclusiveWaiterCount can be called to get an estimate of how many other threads might be waiting to modify the data protected by a particular resource variable. The caller cannot assume that the returned value remains constant for any particular interval.

Requirements

Requirement	Value
Minimum supported client	Available starting with Windows 2000.
Target Platform	Universal
Header	wdm.h (include Wdm.h, Ntddk.h, Ntifs.h)
Library	NtosKrnl.lib
DLL	NtosKrnl.exe
IRQL	<= DISPATCH_LEVEL
DDI compliance rules	HwStorPortProhibitedDDIs(storport)