KeInsertDeviceQueue function

The KeInsertDeviceQueue routine acquires the spin lock for the specified device queue object and, if the device queue is set to a busy state, queues the specified entry.

Syntax

NTKERNELAPI BOOLEAN KeInsertDeviceQueue(
  PKDEVICE_QUEUE       DeviceQueue,
  PKDEVICE_QUEUE_ENTRY DeviceQueueEntry
);

Parameters

DeviceQueue

Pointer to a control object of type device queue for which the caller provides the storage.

DeviceQueueEntry

Pointer to the device queue entry that is to be inserted.

Return Value

If the device queue is empty, FALSE is returned and the DeviceQueueEntry is not inserted in the device queue.

Remarks

If the device queue is set to a busy state, the specified DeviceQueueEntry is inserted at the tail of the device queue and the device queue spin lock is released.

If KeInsertDeviceQueue returns FALSE, the entry was not queued and the caller must begin processing the IRP. A call to KeInsertDeviceQueue or KeInsertByKeyDeviceQueue when the queue is empty causes the device queue to change from a not-busy state to a busy state.

This routine is for code that queues an I/O request to a device driver.

Requirements

   
Windows version 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 IrqlDispatch, MarkingQueuedIrps, HwStorPortProhibitedDDIs, IrqlDispatch(storport)

See Also

KeInitializeDeviceQueue

KeInsertByKeyDeviceQueue

KeRemoveDeviceQueue

KeRemoveEntryDeviceQueue