c++ - boost atomic class make initialize values different from member initialization list -

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I first: Promote atomic class and there is an initial problem.

I have an active data structure 

  struct rowactive data {RoActivate Data}: _rowActive (0), _rowActiveFile (0), _rowActiveTrack (1) {} size_t _rowActive; Size_t _rowActiveFile; Size_t _rowActiveTrack; };

and Row Active Structure use it

Stroke IOActive (Virtual Zero SatelliteActive (size_T line) = 0;}; Structure Row activated: Public IROactive {Row Active () {} Virtual Zero Retroactive (size_T line) {RoActivate Data TMP Data; TmpData._rowActive = Row; TmpData._rowActiveFile = Line * 2; TmpData._rowActiveTrack = Row * 3;} // boost :: atomic // & Lt; rochitvdata & gt; _free; roeviddata_data;};

my question The process is going on, I see that everything is fine, it tells me my values ​​

  _rowActiveFile 0 and _rowActiveTrack is 1.

But when I make a comment, 

  // rovitdata_data;

and extract the atomic comment 

  Promotion: : Atomic Roth Active Data   
 This gives me the garbage value I  
 What could be wrong? According to the documentation, the empty constructor one  unspecified  Starts for value.   
 
 
. Try  
  Prompt: Atom & lt; Roquivettaia & gt; _data (RowActiveData ());  
 
 is on the Boost Docs 
 
 In addition, I have checked, and I feel that at least one of the four array members instead of RoverActivities to promote Will be used, so do not call the constructor.

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