typedef enum _VI_DEADLOCK_RESOURCE_TYPE
{
         VfDeadlockUnknown = 0,
         VfDeadlockMutex = 1,
         VfDeadlockMutexAbandoned = 2,
         VfDeadlockFastMutex = 3,
         VfDeadlockFastMutexUnsafe = 4,
         VfDeadlockSpinLock = 5,
         VfDeadlockTypeMaximum = 6
} VI_DEADLOCK_RESOURCE_TYPE;

Windows Vista Kernel Structures