自动提供getter和setter函数的基本类C ++

Question

My use case is like.

1. I have some plain fields, which need a basic thread safe getter and setter.

2. For some fields a custom getter and setter is required.

What will be the best approach for this problem?

Answer 1

The standard library provides atomic for simple thread-safe getting and setting of values. http://en.cppreference.com/w/cpp/atomic/atomic

Be aware that proper thread safety almost always involves a lot more than wrapping a few members in std::atomic and calling it a day.

Answer 2

To directly answer the question, I don't believe there is a single good answer to this.

Unlike C#, C++ doesn't appear to have automatic get , set generation built into the language, and although there might be a complicated way of doing this "organically" (templates, perhaps?); any solution you might come across might end up being some sort of tool built into an IDE or utility program, such as Eclipse or Code::Blocks.

Additionally, C++ in its C++03 form is not usually inherently thread-safe; support for multi-threading, thread management, async, and memory safety were added on in later versions (C++11 and on), but due to the nature of C++, I don't believe C++ will ever be inherently thread-safe (at least for now).

While std::atomic<type whatever> can be a viable option, you might also want to keep in mind that it is indeed an "add-on" to the language and incurs a time cost, like most other constructs with multi-threading (even atomic operations at the processor level are somewhat slower). You could go the route of mutexes, but again, we're going into multi-threading territory, which may be beyond the scope of your question.