/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
spnlckdb.c
Abstract:
This module contains code which allows debugging of spinlock related NBF
problems. Most of this code is conditional on the manifest constant
NBF_LOCKS.
Author:
David Beaver 13-Feb-1991
(From Chuck Lenzmeier, Jan 1991)
Environment:
Kernel mode
Revision History:
--*/
#include "precomp.h"
#pragma hdrstop
#ifdef NBF_LOCKS
KSPIN_LOCK NbfGlobalLock = NULL;
PKTHREAD NbfGlobalLockOwner = NULL;
ULONG NbfGlobalLockRecursionCount = 0;
ULONG NbfGlobalLockMaxRecursionCount = 0;
KIRQL NbfGlobalLockPreviousIrql = (KIRQL)-1;
BOOLEAN NbfGlobalLockPrint = 1;
#define PRINT_ERR if ( (NbfGlobalLockPrint & 1) != 0 ) DbgPrint
#define PRINT_INFO if ( (NbfGlobalLockPrint & 2) != 0 ) DbgPrint
VOID
NbfAcquireSpinLock(
IN PKSPIN_LOCK Lock,
OUT PKIRQL OldIrql,
IN PSZ LockName,
IN PSZ FileName,
IN ULONG LineNumber
)
{
KIRQL previousIrql;
PKTHREAD currentThread = KeGetCurrentThread( );
if ( NbfGlobalLockOwner == currentThread ) {
ASSERT( Lock != NULL ); // else entering NBF with lock held
ASSERT( NbfGlobalLockRecursionCount != 0 );
NbfGlobalLockRecursionCount++;
if ( NbfGlobalLockRecursionCount > NbfGlobalLockMaxRecursionCount ) {
NbfGlobalLockMaxRecursionCount = NbfGlobalLockRecursionCount;
}
PRINT_INFO( "NBF reentered from %s/%ld, new count %ld\n",
FileName, LineNumber, NbfGlobalLockRecursionCount );
} else {
ASSERT( Lock == NULL ); // else missing an ENTER_NBF call
KeAcquireSpinLock( &NbfGlobalLock, &previousIrql );
ASSERT( NbfGlobalLockRecursionCount == 0 );
NbfGlobalLockOwner = currentThread;
NbfGlobalLockPreviousIrql = previousIrql;
NbfGlobalLockRecursionCount = 1;
PRINT_INFO( "NBF entered from %s/%ld\n", FileName, LineNumber );
}
ASSERT( KeGetCurrentIrql() == DISPATCH_LEVEL );
return;
} // NbfAcquireSpinLock
VOID
NbfReleaseSpinLock(
IN PKSPIN_LOCK Lock,
IN KIRQL OldIrql,
IN PSZ LockName,
IN PSZ FileName,
IN ULONG LineNumber
)
{
PKTHREAD currentThread = KeGetCurrentThread( );
KIRQL previousIrql;
ASSERT( NbfGlobalLockOwner == currentThread );
ASSERT( NbfGlobalLockRecursionCount != 0 );
ASSERT( KeGetCurrentIrql() == DISPATCH_LEVEL );
if ( --NbfGlobalLockRecursionCount == 0 ) {
ASSERT( Lock == NULL ); // else not exiting NBF, but releasing lock
NbfGlobalLockOwner = NULL;
previousIrql = NbfGlobalLockPreviousIrql;
NbfGlobalLockPreviousIrql = (KIRQL)-1;
PRINT_INFO( "NBF exited from %s/%ld\n", FileName, LineNumber );
KeReleaseSpinLock( &NbfGlobalLock, previousIrql );
} else {
ASSERT( Lock != NULL ); // else exiting NBF with lock held
PRINT_INFO( "NBF semiexited from %s/%ld, new count %ld\n",
FileName, LineNumber, NbfGlobalLockRecursionCount );
}
return;
} // NbfReleaseSpinLock
VOID
NbfFakeSendCompletionHandler(
IN NDIS_HANDLE ProtocolBindingContext,
IN PNDIS_PACKET NdisPacket,
IN NDIS_STATUS NdisStatus
)
{
ENTER_NBF;
NbfSendCompletionHandler (ProtocolBindingContext, NdisPacket, NdisStatus);
LEAVE_NBF;
}
VOID
NbfFakeTransferDataComplete (
IN NDIS_HANDLE BindingContext,
IN PNDIS_PACKET NdisPacket,
IN NDIS_STATUS NdisStatus,
IN UINT BytesTransferred
)
{
ENTER_NBF;
NbfTransferDataComplete (BindingContext, NdisPacket, NdisStatus, BytesTransferred);
LEAVE_NBF;
}
#endif // def NBF_LOCKS
