Re: Please help with testing & improving a StringValue class

* Gianni Mariani:


In addition to my previous reply, in version 05 (I guess that will be
0.05!) I've added

     void detach()
     {
         if( refCount() > 1 ) { doDetach( capacity() ); }
         assert( refCount() <= 1 );
     }

     StringValue_& detached()
     {
         detach();
         return *this;
     }

so that a "detached" instance, not sharing data with any other instance,
can be easily created for passing to another thread. The cost is
possible dynamic allocation and O(n) copying, depending on the current
ref-count of the source. I haven't tested this except that doDetach is
used in operator+= and seems to work well.

None of the versions have used static variables, but of course the code
uses dynamic allocation, which depending on the run-time library may use
thread unsafe static variables: that aspect is the same as with any
other C++ code, and with the current standard very tool-specific.

Btw., I've posted version 05 (also supporting operator+= concatenation,
with time generally linear in the argument instead of linear in the
result) at <url: home.no.net/alfps/cpp/lib/alfs_v05.zip>, Boost license.

Cheers,

- Alf

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