c++ - 线程特定指针如何工作

Question

最近我发现了 boost 线程特定指针的魔力。在对线程安全进行了一些研究之后，我想知道 boost 线程特定指针究竟是如何工作的。但是，我似乎无法在文档中找到它。任何人都可以提供一些关于这个或一些详细文档的见解吗？

Answer 1

来自 Boost docs on thread local storage :

boost::thread_specific_ptr provides a portable mechanism for thread-local storage that works on all compilers supported by Boost.Thread. Each instance of boost::thread_specific_ptr represents a pointer to an object (such as errno) where each thread must have a distinct value. The value for the current thread can be obtained using the get() member function, or by using the * and -> pointer deference operators. Initially the pointer has a value of NULL in each thread, but the value for the current thread can be set using the reset() member function.

你可以找到 Boost source here .