c++11&14-多线程要点汇总

//c11.cpp
#include <iostream>
#include <thread>
void threadfun1()
{
 std::cout << "threadfun1 - 1\r\n" << std::endl;
 std::this_thread::sleep_for(std::chrono::seconds(1));
 std::cout << "threadfun1 - 2" << std::endl;
}
void threadfun2(int iParam, std::string sParam)
{
 std::cout << "threadfun2 - 1" << std::endl;
 std::this_thread::sleep_for(std::chrono::seconds(5));
 std::cout << "threadfun2 - 2" << std::endl;
}
int main()
{
 std::thread t1(threadfun1);
 std::thread t2(threadfun2, 10, "abc");
 t1.join();
 std::cout << "join" << std::endl;
 t2.detach();
 std::cout << "detach" << std::endl;
}

//c11.cpp
#include <thread>
#include <atomic>
#include <stdio.h>
#include <iostream>
#include <list>
std::atomic<bool> bIsReady(false);
std::atomic<int> iCount(10);
void threadfun1()
{
 if (!bIsReady) {
  std::this_thread::yield();
 }
 while (iCount > 0)
 {
  printf("iCount:%d\r\n", iCount--);
 }
}
int main()
{
 std::list<std::thread> lstThread;
 for (int i = 0; i < 10; ++i)
 {
  lstThread.push_back(std::thread(threadfun1));
 }
 for (auto& th : lstThread)
 {
  th.join();
 }
}

#include <iostream> // std::cout
#include <thread> // std::thread
#include <mutex> // std::mutex, std::unique_lock
#include <condition_variable> // std::condition_variable
std::mutex mtx;
std::condition_variable cv;
bool ready = false;
void print_id(int id) {
 std::unique_lock<std::mutex> lck(mtx);
 while (!ready) cv.wait(lck); //线程将进入休眠
 // ...
 std::cout << "thread " << id << '\n';
}
void go() {
 std::unique_lock<std::mutex> lck(mtx);
 ready = true;
 cv.notify_all();
}
int main()
{
 std::thread threads[10];
 // spawn 10 threads:
 for (int i = 0; i<10; ++i)
  threads[i] = std::thread(print_id, i);
 std::cout << "10 threads ready to race...\n";
 go(); // go!
 for (auto& th : threads) th.join();
 return 0;
}