lhmouse
commented
5 years ago 在 2018/11/3 下午7:55, Riccardo Rossi 写道:
Hello, i was digging for "intrusive_ptr" implementations in the web and i found very promising your library.
Thank you for the approval.
What is the memory cost of each of your intrusive ptrs?
An intrusive_ptr has the same size as a void *.
As for intrusive_base, there is a reference counter having type
atomic<long> and a pointer to _Weak_view. Thus for each managed
object there is a memory overhead of two pointers typically.
Your implementation gives the same thread safety guarantees as smart_ptrs, right?
The same with std::shared_ptr and std::weak_ptr, exactly.
On my side, i would be interested in using intrusive_ptrs instead of smart_ptr to reduce memory occupation of my program (as well as ideally to improve efficiency). For this reason i was looking for a lightweight version, without weak counters (i would use raw pointers instead of weak ones)
what would it take to achieve that?
See
https://github.com/lhmouse/asteria/blob/master/asteria/src/rocket/refcounted_ptr.hpp
for one without weak counters. There is still the atomic counter in each
managed object, but the pointer to _Weak_view whatsoever no longer
exists there.
-- Best regards, LH_Mouse
Hello, i was digging for "intrusive_ptr" implementations in the web and i found very promising your library. What is the memory cost of each of your intrusive ptrs? Your implementation gives the same thread safety guarantees as smart_ptrs, right?
On my side, i would be interested in using intrusive_ptrs instead of smart_ptr to reduce memory occupation of my program (as well as ideally to improve efficiency). For this reason i was looking for a lightweight version, without weak counters (i would use raw pointers instead of weak ones)
what would it take to achieve that?