RtlRunOnceBeginInitialize

NTSTATUS __stdcall RtlRunOnceBeginInitialize(RTL_RUN_ONCE *RunOnce, UINT64 Flags, PVOID *Context){
  unsigned __int64 Value; 
  NTSTATUS v6; 
  int v8; 
  unsigned __int64 v9; 
  unsigned __int64 v10; 
  if( (((_DWORD)Flags - 1) & (unsigned int)Flags) != 0 || (Flags & 0xFFFFFFFC) != 0 )
    return -1073741584;
  Value = RunOnce->Value;
  v6 = 0;
  if( (RunOnce->Value & 3) == 2 )
    goto LABEL_3;
  if( (Flags & 1) == 0 )
  {
    v8 = Flags & 2;
    while( 1 )
    {
      while( 1 )
      {
        v9 = Value & 3;
        if( (Value & 3) != 0 )
          break;
        v10 = Value;
        Value = _InterlockedCompareExchange64((volatile signed __int64 *)RunOnce, v8 != 0 ? 3i64 : 1i64, Value);
        if( v10 == Value )
          return 259;
      }
      if( v9 != 1 )
        break;
      if( v8 )
        return -1073741584;
      Value = RtlpRunOnceWaitForInit(Value, RunOnce);
    }
    if( v9 == 3 )
      return v8 != 0 ? 259 : -1073741584;
LABEL_3:
    if( Context )
      *Context = (PVOID)(Value & 0xFFFFFFFFFFFFFFFCui64);
    return v6;
  }
  return -1073741823;
}

Referenced by: