Does plain C++ have a class similar to QSharedData

Question

Qt

It is purely academic interest whether there are containers in pure C ++ or at least in Boost with implicit and explicit sharing that implement the Copy on write technique in a similar way to Qt's QSharedData and QSharedDataPointer'u.

Answer 1

std::shared_ptr (available in C++11) or boost::shared_ptr (in earlier standards) should be equivalent to QSharedPointer. You just need to pay attention to thread safety.

Answer 2

Copy on write is a vicious practice, so no - you will not find such.