C++ multi threaded programming notes

thread_guard.cpp

#include <iostream>
#include <stdexcept>
#include <thread>

/* Thread guard is an RAII for thread that ensures
 * join is called when the function that creates
 * the thread goes out of scope.
*/
class ThreadGuard {
    std::thread& managed;

public:
    ThreadGuard(std::thread& managed)
    : managed(managed) {}

    ~ThreadGuard() {
        if (managed.joinable()) {
            managed.join();
        }
    }

    ThreadGuard(const ThreadGuard&) = delete;
    ThreadGuard& operator=(const ThreadGuard&) = delete;
};

void screwUpSomething() {
    throw std::runtime_error("Uh oh");
}

void demo() {
    std::thread t([] {
        std::cout << 1 + 2 << std::endl;
    });
    ThreadGuard tg(t);
    screwUpSomething();
}

int main() {
    demo();
    return 0;
}