std::this_thread::get_id (3) - Linux Manuals

std::this_thread::get_id: std::this_thread::get_id

NAME

std::this_thread::get_id - std::this_thread::get_id

Synopsis

Defined in header <thread>
std::thread::id get_id() noexcept; (since C++11)

Returns the id of the current thread.

Parameters

(none)

Return value

id of the current thread

Example

// Run this code

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

  std::mutex g_display_mutex;

  void foo()
  {
      std::thread::id this_id = std::this_thread::get_id();

      g_display_mutex.lock();
      std::cout << "thread " << this_id << " sleeping...\n";
      g_display_mutex.unlock();

      std::this_thread::sleep_for(std::chrono::seconds(1));
  }

  int main()
  {
      std::thread t1(foo);
      std::thread t2(foo);

      t1.join();
      t2.join();
  }

Possible output:

  thread 0x2384b312 sleeping...
  thread 0x228a10fc sleeping...