struct _FAST_MUTEX// Size=0x38
{
    long Count;// Offset=0x0 Size=0x4
    void * Owner;// Offset=0x8 Size=0x8
    unsigned long Contention;// Offset=0x10 Size=0x4
    struct _KEVENT Event;// Offset=0x18 Size=0x18
    unsigned long OldIrql;// Offset=0x30 Size=0x4
};