STL organization

In the STL, we find the following header organization, and their provided functionality:

Header	Provides
<thread>	The std::thread class. Methods under std::this_thread namespace: yield get_id sleep_for sleep_until
<mutex>	Classes: mutex timed_mutex recursive_mutex recursive_timed_mutex lock_guard scoped_lock (C++17) unique_lock Functions: try_lock lock call_once std::swap (std::unique_lock)
<shared_mutex>	Classes: shared_mutex (C++17) shared_timed_mutex (C++14) shared_lock (C++14) Functions: std::swap (std::shared_lock)
<future>	Classes: promise packaged_task future shared_future Functions: async future_category std::swap (std::promise) std::swap (std::packaged_task)
<condition_variable>	Classes: condition_variable condition_variable_any Function: notify_all_at_thread_exit

In the preceding table, we can see the functionality provided by each header along with the features introduced with the 2014 and 2017 standards. In the following sections, we will take a detailed look at...