Lock-Free: proper allocator

[TmLev]

For a lock-free version of SkipList a lock-free (or really close to it) allocator is needed.

References:

• jemalloc
• fc_malloc
• free-malloc
• std::allocate_shared for specifying allocator in case of using shared_ptr

[Dan-Do]

Hello @TmLev
I suggest these mallocs:
https://github.com/mjansson/rpmalloc
https://github.com/microsoft/snmalloc

[TmLev]

Hi, @Dan-Do!

Thank you for reaching out.

I'm not sure whether the work on this project will continue any time soon or even continue at all, but allocators you suggested look promising.