ExGetSharedWaiterCount function (wdm.h)
The ExGetSharedWaiterCount routine returns the number of waiters on shared access to a given resource.
Syntax
ULONG ExGetSharedWaiterCount(
[in] PERESOURCE Resource
);
Parameters
[in] Resource
A pointer to the resource to be tested.
Return value
ExGetSharedWaiterCount returns the number of threads currently waiting to acquire the given resource for shared access.
Remarks
ExGetSharedWaiterCount can be called to get an estimate of how many other threads might be waiting to read 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) |
See also
ExAcquireResourceExclusiveLite
ExAcquireSharedStarveExclusive