Question

I’m looking for independent implementation of boost/tr1 shared_ptr, weak_ptr and enable_shared_from_this.

I need:

• Boost independent very small implementation of these features.
• I need support of only modern compilers like GCC-4.x, MSVC-2008, Intel not things like MSVC6 or gcc-3.3
• I need it to be licensed under non-copyleft LGPL compatible license like Boost/Mit/3-clause BSD.

So I can include it in my library.

Note – it is quite hard to extract shared_ptr from boost, at least BCP gives about 324 files…

Answer 1

I extracted shared_ptr from Boost to use it separately, and it was definitely fewer than 300 files. That was 3 years ago however so things may have changed (maybe there are more files in the config folder these days?). What I needed for the shared_ptr was:

• assert.hpp
• checked_delete.hpp
• throw_exception.hpp
• config.hpp and config directory
• detail/bad_weak_ptr.hpp
• detail/interlocked.hpp
• detail/shared_count.hpp
• detail/sp_counted_base.hpp
• detail/sp_counted_base_w32.hpp
• detail/sp_counted_impl.hpp
• detail/workaround.hpp
• and finally, shared_ptr.hpp itself.

I don’t think weak_ptr and enable_shared_from_this will add a lot of files to that.