-/* $Id$
- *
+/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
- * FILE: mkernel/kernel/work.c
+ * FILE: ntoskrnl/ex/work.c
* PURPOSE: Manage system work queues
- * PROGRAMMER: David Welch (welch@mcmail.com)
- * REVISION HISTORY:
- * 29/06/98: Created
+ *
+ * PROGRAMMERS: Alex Ionescu - Used correct work queue array and added some fixes and checks.
+ * Gunnar Dalsnes - Implemented
*/
/* INCLUDES ******************************************************************/
/*
* PURPOSE: Queue of items waiting to be processed at normal priority
*/
-KQUEUE EiNormalWorkQueue;
-
-KQUEUE EiCriticalWorkQueue;
-
-KQUEUE EiHyperCriticalWorkQueue;
+EX_WORK_QUEUE ExWorkerQueue[MaximumWorkQueue];
/* FUNCTIONS ****************************************************************/
-//static NTSTATUS STDCALL
-static VOID STDCALL
-ExWorkerThreadEntryPoint(IN PVOID context)
/*
* FUNCTION: Entry point for a worker thread
* ARGUMENTS:
* NOTE: To kill a worker thread you must queue an item whose callback
* calls PsTerminateSystemThread
*/
+static
+VOID
+STDCALL
+ExpWorkerThreadEntryPoint(IN PVOID Context)
{
-
- PWORK_QUEUE_ITEM item;
- PLIST_ENTRY current;
-
- while (TRUE)
- {
- current = KeRemoveQueue( (PKQUEUE)context, KernelMode, NULL );
-
- /* can't happend since we do a KernelMode wait (and we're a system thread) */
- ASSERT((NTSTATUS)current != STATUS_USER_APC);
-
- /* this should never happend either, since we wait with NULL timeout,
- * but there's a slight possibility that STATUS_TIMEOUT is returned
- * at queue rundown in NT (unlikely) -Gunnar
- */
- ASSERT((NTSTATUS)current != STATUS_TIMEOUT);
-
- /* based on INVALID_WORK_QUEUE_ITEM bugcheck desc. */
- if (current->Flink == NULL || current->Blink == NULL)
- {
- KeBugCheck(INVALID_WORK_QUEUE_ITEM);
- }
-
- /* "reinitialize" item (same as done in ExInitializeWorkItem) */
- current->Flink = NULL;
-
- item = CONTAINING_RECORD( current, WORK_QUEUE_ITEM, List);
- item->WorkerRoutine(item->Parameter);
-
- if (KeGetCurrentIrql() != PASSIVE_LEVEL)
- {
- KeBugCheck(IRQL_NOT_LESS_OR_EQUAL);
- }
- }
-
+ PWORK_QUEUE_ITEM WorkItem;
+ PLIST_ENTRY QueueEntry;
+ WORK_QUEUE_TYPE WorkQueueType;
+ PEX_WORK_QUEUE WorkQueue;
+
+ /* Get Queue Type and Worker Queue */
+ WorkQueueType = (WORK_QUEUE_TYPE)Context;
+ WorkQueue = &ExWorkerQueue[WorkQueueType];
+
+ /* Loop forever */
+ while (TRUE) {
+
+ /* Wait for Something to Happen on the Queue */
+ QueueEntry = KeRemoveQueue(&WorkQueue->WorkerQueue, KernelMode, NULL);
+
+ /* Can't happen since we do a KernelMode wait (and we're a system thread) */
+ ASSERT((NTSTATUS)QueueEntry != STATUS_USER_APC);
+
+ /* this should never happen either, since we wait with NULL timeout,
+ * but there's a slight possibility that STATUS_TIMEOUT is returned
+ * at queue rundown in NT (unlikely) -Gunnar
+ */
+ ASSERT((NTSTATUS)QueueEntry != STATUS_TIMEOUT);
+
+ /* Increment Processed Work Items */
+ InterlockedIncrement((PLONG)&WorkQueue->WorkItemsProcessed);
+
+ /* Get the Work Item */
+ WorkItem = CONTAINING_RECORD(QueueEntry, WORK_QUEUE_ITEM, List);
+
+ /* Call the Worker Routine */
+ WorkItem->WorkerRoutine(WorkItem->Parameter);
+
+ /* Make sure it returned at right IRQL */
+ if (KeGetCurrentIrql() != PASSIVE_LEVEL) {
+
+ KEBUGCHECKEX(WORKER_THREAD_RETURNED_AT_BAD_IRQL,
+ (ULONG_PTR)WorkItem->WorkerRoutine,
+ KeGetCurrentIrql(),
+ (ULONG_PTR)WorkItem->Parameter,
+ (ULONG_PTR)WorkItem);
+ }
+
+ /* Make sure it returned with Impersionation Disabled */
+ if (PsGetCurrentThread()->ActiveImpersonationInfo) {
+
+ KEBUGCHECKEX(IMPERSONATING_WORKER_THREAD,
+ (ULONG_PTR)WorkItem->WorkerRoutine,
+ (ULONG_PTR)WorkItem->Parameter,
+ (ULONG_PTR)WorkItem,
+ 0);
+ }
+ }
}
-static VOID ExInitializeWorkQueue(PKQUEUE WorkQueue,
- KPRIORITY Priority)
+static
+VOID
+STDCALL
+ExpInitializeWorkQueue(WORK_QUEUE_TYPE WorkQueueType,
+ KPRIORITY Priority)
{
- ULONG i;
- PETHREAD Thread;
- HANDLE hThread;
-
-
- for (i=0; i<NUMBER_OF_WORKER_THREADS; i++)
- {
-
- PsCreateSystemThread(&hThread,
- THREAD_ALL_ACCESS,
- NULL,
- NULL,
- NULL,
- ExWorkerThreadEntryPoint,
- WorkQueue);
- ObReferenceObjectByHandle(hThread,
- THREAD_ALL_ACCESS,
- PsThreadType,
- KernelMode,
- (PVOID*)&Thread,
- NULL);
- KeSetPriorityThread(&Thread->Tcb,
- Priority);
- ObDereferenceObject(Thread);
- ZwClose(hThread);
- }
+ ULONG i;
+ PETHREAD Thread;
+ HANDLE hThread;
+
+ /* Loop through how many threads we need to create */
+ for (i = 0; i < NUMBER_OF_WORKER_THREADS; i++) {
+
+ /* Create the System Thread */
+ PsCreateSystemThread(&hThread,
+ THREAD_ALL_ACCESS,
+ NULL,
+ NULL,
+ NULL,
+ ExpWorkerThreadEntryPoint,
+ (PVOID)WorkQueueType);
+
+ /* Get the Thread */
+ ObReferenceObjectByHandle(hThread,
+ THREAD_SET_INFORMATION,
+ PsThreadType,
+ KernelMode,
+ (PVOID*)&Thread,
+ NULL);
+
+ /* Set the Priority */
+ KeSetPriorityThread(&Thread->Tcb, Priority);
+
+ /* Dereference and close handle */
+ ObDereferenceObject(Thread);
+ ZwClose(hThread);
+ }
}
-VOID INIT_FUNCTION
-ExInitializeWorkerThreads(VOID)
+VOID
+INIT_FUNCTION
+STDCALL
+ExpInitializeWorkerThreads(VOID)
{
- KeInitializeQueue( &EiNormalWorkQueue, NUMBER_OF_WORKER_THREADS );
- KeInitializeQueue( &EiCriticalWorkQueue , NUMBER_OF_WORKER_THREADS );
- KeInitializeQueue( &EiHyperCriticalWorkQueue , NUMBER_OF_WORKER_THREADS );
-
- ExInitializeWorkQueue(&EiNormalWorkQueue,
- LOW_PRIORITY);
- ExInitializeWorkQueue(&EiCriticalWorkQueue,
- LOW_REALTIME_PRIORITY);
- ExInitializeWorkQueue(&EiHyperCriticalWorkQueue,
- HIGH_PRIORITY);
+ ULONG WorkQueueType;
+
+ /* Initialize the Array */
+ for (WorkQueueType = 0; WorkQueueType < MaximumWorkQueue; WorkQueueType++) {
+
+ RtlZeroMemory(&ExWorkerQueue[WorkQueueType], sizeof(EX_WORK_QUEUE));
+ KeInitializeQueue(&ExWorkerQueue[WorkQueueType].WorkerQueue, 0);
+ }
+
+ /* Create the built-in worker threads for each work queue */
+ ExpInitializeWorkQueue(CriticalWorkQueue, LOW_REALTIME_PRIORITY);
+ ExpInitializeWorkQueue(DelayedWorkQueue, LOW_PRIORITY);
+ ExpInitializeWorkQueue(HyperCriticalWorkQueue, HIGH_PRIORITY);
}
/*
* @implemented
- */
-VOID STDCALL
-ExQueueWorkItem (PWORK_QUEUE_ITEM WorkItem,
- WORK_QUEUE_TYPE QueueType)
-/*
+ *
* FUNCTION: Inserts a work item in a queue for one of the system worker
* threads to process
* ARGUMENTS:
* WorkItem = Item to insert
* QueueType = Queue to insert it in
*/
+VOID
+STDCALL
+ExQueueWorkItem(PWORK_QUEUE_ITEM WorkItem,
+ WORK_QUEUE_TYPE QueueType)
{
ASSERT(WorkItem!=NULL);
ASSERT_IRQL(DISPATCH_LEVEL);
ASSERT(WorkItem->List.Flink == NULL);
- /*
- * Insert the item in the appropiate queue and wake up any thread
- * waiting for something to do
- */
- switch(QueueType)
- {
- case DelayedWorkQueue:
- KeInsertQueue (
- &EiNormalWorkQueue,
- &WorkItem->List
- );
- break;
-
- case CriticalWorkQueue:
- KeInsertQueue (
- &EiCriticalWorkQueue,
- &WorkItem->List
- );
- break;
-
- case HyperCriticalWorkQueue:
- KeInsertQueue (
- &EiHyperCriticalWorkQueue,
- &WorkItem->List
- );
- break;
-
- default:
- break;
- }
+ /* Insert the Queue */
+ KeInsertQueue(&ExWorkerQueue[QueueType].WorkerQueue, &WorkItem->List);
}
/* EOF */
projects / reactos.git / blobdiff