#include <iostream>
#include <thread>
#include <condition_variable>
#include <mutex>
#include <atomic>
using namespace std;
atomic<int> control_int;
mutex s_mutex_;
condition_variable s_convar;
void PrintID(int id)
{
for (int i = 0 ; i < 10 ; i++)
{
unique_lock<mutex> cv_(s_mutex_);
s_convar.wait(cv_, [id] {return control_int == id;});
cout << char('A' + id);
control_int = (control_int+1) % 3;
s_convar.notify_all();
}
return;
}
int main()
{
thread arr_thread[3];
for (int i = 0 ; i < 3; i++)
{
arr_thread[i] = thread(PrintID, i);
}
//創建和join不能放到一個循環裏
for (int i = 0; i < 3; i++)
{
arr_thread[i].join();
}
return 0;
}
剛學習了C++11標準的幾個線程同步方法,用來練練手。demo裏代碼應該算比較精簡了。