C++ Thread - C++11 Thread 관리

Mutex

• lock, unlock

#include <iostream>
#include <mutex> // include <thread>

int cnt = 0;
std::mutex m;

void foo(int id)
{
	for (int i = 0; i < 10; ++i)
	{
		m.lock();
		std::cout << id << " : " << cnt++ << std::endl;
		m.unlock();
		std::this_thread::sleep_for(1s);
	}
}

int main()
{
	thread t1(foo, 1);
	thread t2(foo, 2);

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

• try_lock

• std::lock_guard

  • RAII

void foo(int id)
{
	for (int i = 0; i < 10; ++i)
	{
		{
			std::lock_guard<std::mutex> lock(m);
			std::cout << id << " : " << cnt++ << std::endl;
		}
		std::this_thread::sleep_for(1s);
	}
}

• std::recursive_mutex
  • lock 을 여러번 걸고 싶을 때 사용

#include <iostream>
#include <mutex> // include <thread>

int cnt = 0;
std::recursive_mutex m;

void bar()
{
	std::lock_guard<std::recursive_mutex> lock(m);
}

void foo(int id)
{
	std::lock_guard<std::recursive_mutex> lock(m);
	bar();
}

int main()
{
	thread t1(foo, 1);
	thread t2(foo, 2);

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

• std::scoped_lock // C++17
• std::unique_lock
• std::timed_mutex
• std::recursive_timed_mutex
• std::shared_mutex // C++17