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105 lines
2.6 KiB
C
105 lines
2.6 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/include/io_x.h
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* PURPOSE: Internal Inlined Functions for the I/O Manager
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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VOID
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static __inline
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IopLockFileObject(IN PFILE_OBJECT FileObject)
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{
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/* Lock the FO and check for contention */
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InterlockedIncrement((PLONG)&FileObject->Waiters);
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while (InterlockedCompareExchange((PLONG)&FileObject->Busy, TRUE, FALSE) != FALSE)
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{
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/* FIXME - pause for a little while? */
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}
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InterlockedDecrement((PLONG)&FileObject->Waiters);
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}
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VOID
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static __inline
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IopUnlockFileObject(IN PFILE_OBJECT FileObject)
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{
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/* Unlock the FO and wake any waiters up */
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InterlockedExchange((PLONG)&FileObject->Busy, FALSE);
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if (FileObject->Waiters) KeSetEvent(&FileObject->Lock, 0, FALSE);
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}
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VOID
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FORCEINLINE
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IopQueueIrpToThread(IN PIRP Irp)
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{
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KIRQL OldIrql;
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/* Raise to APC Level */
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KeRaiseIrql(APC_LEVEL, &OldIrql);
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/* Insert it into the list */
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InsertHeadList(&Irp->Tail.Overlay.Thread->IrpList, &Irp->ThreadListEntry);
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/* Lower irql */
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KeLowerIrql(OldIrql);
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}
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VOID
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FORCEINLINE
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IopUnQueueIrpFromThread(IN PIRP Irp)
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{
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/* Remove it from the list and reset it */
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RemoveEntryList(&Irp->ThreadListEntry);
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InitializeListHead(&Irp->ThreadListEntry);
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}
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VOID
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static __inline
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IopUpdateOperationCount(IN IOP_TRANSFER_TYPE Type)
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{
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PLARGE_INTEGER CountToChange;
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/* Make sure I/O operations are being counted */
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if (IoCountOperations)
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{
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if (Type == IopReadTransfer)
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{
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/* Increase read count */
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IoReadOperationCount++;
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CountToChange = &PsGetCurrentProcess()->ReadOperationCount;
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}
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else if (Type == IopWriteTransfer)
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{
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/* Increase write count */
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IoWriteOperationCount++;
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CountToChange = &PsGetCurrentProcess()->ReadOperationCount;
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}
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else
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{
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/* Increase other count */
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IoOtherOperationCount++;
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CountToChange = &PsGetCurrentProcess()->ReadOperationCount;
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}
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/* Increase the process-wide count */
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ExInterlockedAddLargeStatistic(CountToChange, 1);
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}
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}
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BOOLEAN
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static __inline
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IopValidateOpenPacket(IN POPEN_PACKET OpenPacket)
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{
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/* Validate the packet */
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if (!(OpenPacket) ||
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(OpenPacket->Type != IO_TYPE_OPEN_PACKET) ||
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(OpenPacket->Size != sizeof(OPEN_PACKET)))
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{
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/* Fail */
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return FALSE;
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}
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/* Good packet */
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return TRUE;
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}
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