#include <iostream>
#include <thread>
#include <mutex>
#include <map>
#include <string>
 
std::map<std::string, std::string> g_pages;
std::mutex g_pages_mutex;
 
void save_page(const std::string &url)
{
    std::string result = "fake content";
 
    g_pages_mutex.lock();
    try{
    	g_pages[url] = result;
    	if( url.find("thrd2", 0) != std::string::npos )
    		throw "I'm naipnulosya";
    }
    catch(const char * msg){
    	 g_pages[url] = msg;
    }
    g_pages_mutex.unlock();
}
 
int main()
{
    std::thread t1(save_page, "http://thrd1URL");
    std::thread t2(save_page, "http://thrd2URL");
    t1.join();
    t2.join();
 
    g_pages_mutex.lock();  
    for (const auto &pair : g_pages) {
        std::cout << pair.first << " => " << pair.second << '\n';
    }
    g_pages_mutex.unlock();  
    return 0;
}