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Citigroup Interview Question Software Engineer / Developers

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    is STL map thread-safe? why?

    - Itcecsa on June 06, 2011 Report Duplicate | Flag
    Citigroup Software Engineer / Developer C++



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Of course not. Thread safety can be implemented in the user code based on the need. Putting it inside the Thread Map will make everyone pay performance penalty irrespective of their need.

- Arvind.Sinh on June 06, 2011 | Flag Reply
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But map could be easily implemented with different thread models: map<int, string, SingleThreaded> and map<int, string, MultiThreaded>. stl designers do not take into account the multi-threading.

- m@}{ on June 07, 2011 | Flag
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so I will say the STL containers are not thread-safe unless thread-safe mechanisms are added?

- Itcecsa on June 06, 2011 | Flag Reply
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Exactly

- kk on June 17, 2011 | Flag
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Is it true that GNU STL default allocators are not thread-safe.

- ntimes on January 15, 2012 | Flag Reply


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