cameron314
commented
2 years ago static at file scope means the variable is defined only in the current translation unit. Every .cpp including that header is getting its own private queue.
If you have access to C++17, you can declare the variable inline instead of static. Otherwise, you'll have to declare the variable in the header and define it explicitly in a single .cpp.
djhdj1
When I use this queue, I find that the queue fails when I do cross file usage. As an example: I created the queue under the a.h file:
static moodycamel::ConcurrentQueue<int> inta(10);, and then in b.cppinta.try_enqueue(741852); int b = 0; inta.try_dequeue(b);cout << "\nb： " << b;the console will output 741852. But when I do onlyinta.try_enqueue(741852);in b.cpp and in c.cppint b = 0;inta.try_dequeue(b);cout << "\nb: " << b ;The console will only output 0. I hope you can tell me which of my operations is wrong and how to use it if I want to use it across files, thanks!