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Modern C++ Concurrency: Get the most out of any machine

Multithreading: Threads

Explore the fundamental concepts of threads in modern C++ concurrency. Understand why using tasks is often preferable to raw threads, learn how to safely communicate between threads, avoid race conditions, and implement joinable threads using wrappers to maintain thread safety.

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Threads

Threads are the basic building blocks for writing concurrent programs.

Use tasks instead of threads

C++
// asyncVersusThread.cpp
#include <future>
#include <thread>
#include <iostream>
int main(){
  std::cout << std::endl;
  int res;
  std::thread t([&]{ res = 2000 + 11; });
  t.join();
  std::cout << "res: " << res << std::endl;             
  auto fut= std::async([]{ return 2000 + 11; });
  std::cout << "fut.get(): " << fut.get() << std::endl;   
  std::cout << std::endl;   
}

Based on the program, there are a lot of reasons for preferring tasks over threads. These are the main reasons:

  • you can use a safe communication channel for returning the result of the communication. If you use a shared
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