reactos/sdk/lib/drivers/chew/workqueue.c

94 lines
2.3 KiB
C

/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: lib/drivers/chew/workqueue.c
* PURPOSE: Common Highlevel Executive Worker
*
* PROGRAMMERS: arty (ayerkes@speakeasy.net)
*/
#include <ntddk.h>
#include <chew/chew.h>
#define NDEBUG
//#include <debug.h>
#define FOURCC(w,x,y,z) (((w) << 24) | ((x) << 16) | ((y) << 8) | (z))
#define CHEW_TAG FOURCC('C','H','E','W')
PDEVICE_OBJECT WorkQueueDevice;
LIST_ENTRY WorkQueue;
KSPIN_LOCK WorkQueueLock;
KEVENT WorkQueueClear;
typedef struct _WORK_ITEM
{
LIST_ENTRY Entry;
PIO_WORKITEM WorkItem;
VOID (*Worker)(PVOID WorkerContext);
PVOID WorkerContext;
} WORK_ITEM, *PWORK_ITEM;
VOID ChewInit(PDEVICE_OBJECT DeviceObject)
{
WorkQueueDevice = DeviceObject;
InitializeListHead(&WorkQueue);
KeInitializeSpinLock(&WorkQueueLock);
KeInitializeEvent(&WorkQueueClear, NotificationEvent, TRUE);
}
VOID ChewShutdown(VOID)
{
KeWaitForSingleObject(&WorkQueueClear, Executive, KernelMode, FALSE, NULL);
}
VOID NTAPI ChewWorkItem(PDEVICE_OBJECT DeviceObject, PVOID ChewItem)
{
PWORK_ITEM WorkItem = ChewItem;
KIRQL OldIrql;
WorkItem->Worker(WorkItem->WorkerContext);
IoFreeWorkItem(WorkItem->WorkItem);
KeAcquireSpinLock(&WorkQueueLock, &OldIrql);
RemoveEntryList(&WorkItem->Entry);
if (IsListEmpty(&WorkQueue))
KeSetEvent(&WorkQueueClear, 0, FALSE);
KeReleaseSpinLock(&WorkQueueLock, OldIrql);
ExFreePoolWithTag(WorkItem, CHEW_TAG);
}
BOOLEAN ChewCreate(VOID (*Worker)(PVOID), PVOID WorkerContext)
{
PWORK_ITEM Item;
Item = ExAllocatePoolWithTag(NonPagedPool,
sizeof(WORK_ITEM),
CHEW_TAG);
if (Item)
{
Item->WorkItem = IoAllocateWorkItem(WorkQueueDevice);
if (!Item->WorkItem)
{
ExFreePool(Item);
return FALSE;
}
Item->Worker = Worker;
Item->WorkerContext = WorkerContext;
ExInterlockedInsertTailList(&WorkQueue, &Item->Entry, &WorkQueueLock);
KeClearEvent(&WorkQueueClear);
IoQueueWorkItem(Item->WorkItem, ChewWorkItem, DelayedWorkQueue, Item);
return TRUE;
}
else
{
return FALSE;
}
}