3 * COPYRIGHT: See COPYING in the top level directory
4 * PROJECT: ReactOS kernel
5 * FILE: ntoskrnl/io/iowork.c
6 * PURPOSE: Manage IO system work queues
8 * PROGRAMMERS: David Welch (welch@mcmail.com)
9 * Robert Dickenson (odin@pnc.com.au)
12 /* INCLUDES ******************************************************************/
16 #include <internal/debug.h>
18 /* TYPES ********************************************************************/
20 typedef struct _IO_WORKITEM
23 PDEVICE_OBJECT DeviceObject
;
24 PIO_WORKITEM_ROUTINE WorkerRoutine
;
28 /* FUNCTIONS ****************************************************************/
31 IoWorkItemCallback(PVOID Parameter
)
33 PIO_WORKITEM IoWorkItem
= (PIO_WORKITEM
)Parameter
;
34 PDEVICE_OBJECT DeviceObject
= IoWorkItem
->DeviceObject
;
35 IoWorkItem
->WorkerRoutine(IoWorkItem
->DeviceObject
, IoWorkItem
->Context
);
36 ObDereferenceObject(DeviceObject
);
43 IoQueueWorkItem(IN PIO_WORKITEM IoWorkItem
,
44 IN PIO_WORKITEM_ROUTINE WorkerRoutine
,
45 IN WORK_QUEUE_TYPE QueueType
,
48 * FUNCTION: Inserts a work item in a queue for one of the system worker
51 * IoWorkItem = Item to insert
52 * QueueType = Queue to insert it in
55 ExInitializeWorkItem(&IoWorkItem
->Item
, IoWorkItemCallback
,
57 IoWorkItem
->WorkerRoutine
= WorkerRoutine
;
58 IoWorkItem
->Context
= Context
;
59 ObReferenceObjectByPointer(IoWorkItem
->DeviceObject
,
63 ExQueueWorkItem(&IoWorkItem
->Item
, QueueType
);
70 IoFreeWorkItem(PIO_WORKITEM IoWorkItem
)
72 ExFreePool(IoWorkItem
);
79 IoAllocateWorkItem(PDEVICE_OBJECT DeviceObject
)
81 PIO_WORKITEM IoWorkItem
= NULL
;
84 ExAllocatePoolWithTag(NonPagedPool
, sizeof(IO_WORKITEM
), TAG_IOWI
);
85 if (IoWorkItem
== NULL
)
89 RtlZeroMemory(IoWorkItem
, sizeof(IO_WORKITEM
));
90 IoWorkItem
->DeviceObject
= DeviceObject
;