mirror of
https://github.com/reactos/reactos.git
synced 2024-07-01 10:20:03 +00:00
70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
/*++
|
|
|
|
Copyright (C) Microsoft Corporation, 1991 - 1999
|
|
|
|
Module Name:
|
|
|
|
clntirp.c
|
|
|
|
Abstract:
|
|
|
|
Client IRP queuing routines for CLASSPNP
|
|
|
|
Environment:
|
|
|
|
kernel mode only
|
|
|
|
Notes:
|
|
|
|
|
|
Revision History:
|
|
|
|
--*/
|
|
|
|
#include "classp.h"
|
|
|
|
/*
|
|
* EnqueueDeferredClientIrp
|
|
*
|
|
* Note: we currently do not support Cancel for storage irps.
|
|
*/
|
|
VOID NTAPI EnqueueDeferredClientIrp(PCLASS_PRIVATE_FDO_DATA FdoData, PIRP Irp)
|
|
{
|
|
KIRQL oldIrql;
|
|
|
|
KeAcquireSpinLock(&FdoData->SpinLock, &oldIrql);
|
|
InsertTailList(&FdoData->DeferredClientIrpList, &Irp->Tail.Overlay.ListEntry);
|
|
KeReleaseSpinLock(&FdoData->SpinLock, oldIrql);
|
|
}
|
|
|
|
|
|
/*
|
|
* DequeueDeferredClientIrp
|
|
*
|
|
*/
|
|
PIRP NTAPI DequeueDeferredClientIrp(PCLASS_PRIVATE_FDO_DATA FdoData)
|
|
{
|
|
KIRQL oldIrql;
|
|
PLIST_ENTRY listEntry;
|
|
PIRP irp;
|
|
|
|
KeAcquireSpinLock(&FdoData->SpinLock, &oldIrql);
|
|
if (IsListEmpty(&FdoData->DeferredClientIrpList)){
|
|
listEntry = NULL;
|
|
}
|
|
else {
|
|
listEntry = RemoveHeadList(&FdoData->DeferredClientIrpList);
|
|
}
|
|
KeReleaseSpinLock(&FdoData->SpinLock, oldIrql);
|
|
|
|
if (listEntry == NULL) {
|
|
irp = NULL;
|
|
} else {
|
|
irp = CONTAINING_RECORD(listEntry, IRP, Tail.Overlay.ListEntry);
|
|
ASSERT(irp->Type == IO_TYPE_IRP);
|
|
InitializeListHead(&irp->Tail.Overlay.ListEntry);
|
|
}
|
|
|
|
return irp;
|
|
}
|