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std::jthread::get_id(3)        C++ Standard Libary	 std::jthread::get_id(3)

NAME
     std::jthread::get_id - std::jthread::get_id

Synopsis
	[[nodiscard]] std::jthread::id get_id() const noexcept;  (since C++20)

	Returns  a  value  of  std::jthread::id  (which  is  a	type  alias  for
     std::thread::id)
	identifying the thread associated with *this.

Parameters
	(none)

Return value
	A value of type std::jthread::id identifying the thread associated  with
     *this. If
	there  is  no thread associated, default constructed std::jthread::id is
     returned.

Example
     // Run this code

      #include <chrono>
      #include <iostream>
      #include <thread>

      void foo()
      {
	  std::this_thread::sleep_for(std::chrono::seconds(1));
      }

      int main()
      {
	  std::jthread t1(foo);
	  std::jthread::id t1_id = t1.get_id();

	  std::jthread t2(foo);
	  std::jthread::id t2_id = t2.get_id();

	  std::cout << "t1's id: " << t1_id << '\n';
	  std::cout << "t2's id: " << t2_id << '\n';

	  t1.join();
	  t2.join();

	  std::cout << "t1's id after join: " << t1.get_id() << '\n';
	  std::cout << "t2's id after join: " << t2.get_id() << '\n';
      }

Possible output:
      t1's id: 140146221688576
      t2's id: 140146213295872
      t1's id after join: thread::id of a non-executing thread
      t2's id after join: thread::id of a non-executing thread

See also
	id	 represents the id of a thread
		 (public member class of std::thread)
		 checks whether the thread is joinable, i.e. potentially running
     in parallel
	joinable context
		 (public member function)

http://cppreference.com 	   2024.06.10		 std::jthread::get_id(3)
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