Eike Rathke wrote: > On Sunday, 2013-01-20 19:55:17 +0100, Markus Mohrhard wrote: > > Someone implemented here manualy ref counting. If you want to remove > > the warning you can replace the raw pointer + the ref counting > > variable with a boost::shared_ptr. > > While boost::shared_ptr is of course cleaner code, for mass objects it > may add a runtime performance penalty if they are passed around a lot. > For example I wouldn't change formula tokens to shared_ptr ... > Yeah, because of atomic counters, and because of extra memory allocations. Here's some background on various kinds of smart ptrs:
http://www.boost.org/doc/libs/1_35_0/doc/html/interprocess/interprocess_smart_ptr.html As an aside, for a number of basegfx objects, copy-on-write semantics are implemented via o3tl/inc/o3tl/cow_wrapper.hxx - see e.g. basegfx/inc/basegfx/tools/b2dclipstate.hxx for a simple example. At least for vcl stuff like Bitmaps, this template could be used instead of the hand-rolled versions. Cheers, -- Thorsten
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