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94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/io/iowork.c
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* PURPOSE: I/O Wrappers for the Executive Work Item Functions
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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* Robert Dickenson (odin@pnc.com.au)
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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/* PRIVATE FUNCTIONS *********************************************************/
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VOID
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NTAPI
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IopWorkItemCallback(IN PVOID Parameter)
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{
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PIO_WORKITEM IoWorkItem = (PIO_WORKITEM)Parameter;
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PDEVICE_OBJECT DeviceObject = IoWorkItem->DeviceObject;
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PAGED_CODE();
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/* Call the work routine */
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IoWorkItem->WorkerRoutine(DeviceObject, IoWorkItem->Context);
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/* Dereference the device object */
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ObDereferenceObject(DeviceObject);
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}
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/* PUBLIC FUNCTIONS **********************************************************/
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/*
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* @implemented
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*/
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VOID
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NTAPI
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IoQueueWorkItem(IN PIO_WORKITEM IoWorkItem,
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IN PIO_WORKITEM_ROUTINE WorkerRoutine,
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IN WORK_QUEUE_TYPE QueueType,
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IN PVOID Context)
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{
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/* Make sure we're called at DISPATCH or lower */
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ASSERT_IRQL_LESS_OR_EQUAL(DISPATCH_LEVEL);
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/* Reference the device object */
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ObReferenceObject(IoWorkItem->DeviceObject);
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/* Setup the work item */
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IoWorkItem->WorkerRoutine = WorkerRoutine;
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IoWorkItem->Context = Context;
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/* Queue the work item */
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ExQueueWorkItem(&IoWorkItem->Item, QueueType);
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}
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/*
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* @implemented
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*/
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VOID
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NTAPI
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IoFreeWorkItem(IN PIO_WORKITEM IoWorkItem)
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{
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/* Free the work item */
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ExFreePool(IoWorkItem);
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}
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/*
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* @implemented
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*/
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PIO_WORKITEM
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NTAPI
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IoAllocateWorkItem(IN PDEVICE_OBJECT DeviceObject)
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{
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PIO_WORKITEM IoWorkItem;
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/* Allocate the work item */
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IoWorkItem = ExAllocatePoolWithTag(NonPagedPool,
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sizeof(IO_WORKITEM),
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TAG_IOWI);
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if (!IoWorkItem) return NULL;
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/* Initialize it */
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IoWorkItem->DeviceObject = DeviceObject;
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ExInitializeWorkItem(&IoWorkItem->Item, IopWorkItemCallback, IoWorkItem);
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/* Return it */
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return IoWorkItem;
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}
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/* EOF */
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