CcGetPartition

INT64 __fastcall CcGetPartition(_QWORD *a1){
  UINT64 *v1; 
  INT64 v2; 
  __int64 v3; 
  unsigned __int8 CurrentIrql; 
  signed __int32 v5; 
  ULONG_PTR *v6; 
  bool v8; 
  signed __int32 v9; 
  UINT64 SpinCount; 
  v2 = a1[66];
  if( a1[21] )
  {
    v3 = *(_QWORD *)((a1[12] & 0xFFFFFFFFFFFFFFF0ui64) + 0x28);
    CurrentIrql = KeGetCurrentIrql();
    __writecr8(2ui64);
    LODWORD(SpinCount) = 0;
    if( _interlockedbittestandset(&dword_140C4C6C0, 0x1Fu) )
      LODWORD(SpinCount) = ExpWaitForSpinLockExclusiveAndAcquire((RTL_BITMAP *)&dword_140C4C6C0, CurrentIrql, v1);
    v5 = dword_140C4C6C0;
    while( (v5 & 0xBFFFFFFF) != 0x80000000 )
    {
      if( (v5 & 0x40000000) == 0 )
      {
        v9 = _InterlockedCompareExchange(&dword_140C4C6C0, v5 | 0x40000000, v5);
        v8 = v5 == v9;
        v5 = v9;
        if( !v8 )
          continue;
      }
      KeYieldProcessorEx(&SpinCount);
      v5 = dword_140C4C6C0;
    }
    if( *(_QWORD *)v3 )
      v6 = *(ULONG_PTR **)(qword_140C4E388 + 8i64 * (*(_WORD *)(*(_QWORD *)v3 + 60i64) & 0x3FF));
    else
      v6 = &MiSystemPartition;
    dword_140C4C6C0 = 0;
    __writecr8(CurrentIrql);
    if( v2 != *(_QWORD *)(v6[22] + 8) )
      KeBugCheckEx(0x34u, 0x1313ui64, 0xFFFFFFFFC0000420ui64, 0i64, 0i64);
  }
  return v2;
}

Referenced by: