#include <thread>
#include <iostream>
#include <mutex>
#include <condition_variable>
std::mutex data_mutex;
std::condition_variable data_var;
bool label = false;
void printodd()
{
std::unique_lock<std::mutex> ulock(data_mutex) ;
for(int odd = 1; odd <= 100; odd += 2 )
{
data_var.wait(ulock,[]{return label;});
std::cout<< std::this_thread::get_id() << ": " << odd <<std::endl;
label = false;
data_var.notify_one();
}
}
void printeven()
{
std::unique_lock<std::mutex> ulock(data_mutex) ;
for(int even = 0; even < 100; even += 2 )
{
std::cout<< std::this_thread::get_id() << ": " << even <<std::endl;
data_var.notify_one();
label = true;
data_var.wait(ulock,[]{return !label;});
}
}
int main()
{
std::thread t1(printeven);
std::thread t2(printodd);
t1.join();
t2.join();
std::cout<<"end!"<<std::endl;
return 0;
}
