The C++ Thread Class

Objectives

1. Understand the basics of threads in c++

Notes

• C++ has two standard thread classes
  • thread, since c++11
  • jthread, since c++20
• From what I am reading, jthreads are superior to threads.
• reference, but see the many tutorials out there.
• Advantages
  • Proper construction, copy and destruction under RAII
  • Pass parameters, even by reference, so no nasty casting
    • Makes a thread local copy of variables.
    • But I need ref from the standard library
      • reference.
      • Creates a rvalue reference to a variable.
      • I'm sorry, I don't understand this completely,
      • but one use case is for threads.
    • And emplace_back
      • reference
      • takes the arguments to construct a new instance of the class.
      • And constructs it in the vector.
      • This is for things that can't be copied directly with the = operator in the jthread class.
      • I did examples of both in the code.
• jthread tid{function, arg1, arg2, ...};
• tid.joinable() => bool true if done working
• tid.join() blocking join
• tid.get_id() returns the thread id.
• Oh and this_thread
  • std::this_thread returns the current thread
  • reference
  • get_id()
  • yield()
  • sleep_until
  • sleep_for
• See jpi.cpp.