#include <iostream>
#include <thread>
#include <mutex>
#include <string>


std::mutex g_pages_mutex;

class cButtonEmul{
protected:
    bool bState;
public:
    cButtonEmul(bool bState = true){
        cButtonEmul::bState = bState;
    }
    bool getState(){return bState;}
    bool setState(bool bState){
        cButtonEmul::bState = bState;
    }
};

struct sThreadParam{
	std::string *url;
	cButtonEmul *btn;
};
 

void save_page(const sThreadParam &param)
{
	if( param.btn )
	    param.btn->setState(false);
    g_pages_mutex.lock();
	try
	{
		try
		{
			if( param.url ){
			if( param.url->find("thrd2", 0) != std::string::npos )
				throw "I'm naipnulosya";
			else
			if( param.url->find("thrd1", 0) != std::string::npos )
				throw 0;
			else
			   *param.url = "fake content";
			}
		}
		catch(const char * msg){
			if( param.url )
			   *param.url = msg;
		}
	}
	catch(...){
		g_pages_mutex.unlock();
		if( param.url )
		   *param.url = "unhandled exception occured!";
		if( param.btn )
			param.btn->setState(true);
		return;//àâàð³éíèé âèõ³ä
	}
    g_pages_mutex.unlock();
	if( param.btn )
	    param.btn->setState(true);
}
 
int main()
{
	cButtonEmul btn1(false);std::string sDownload1 = "http://thrd1URL";
	cButtonEmul btn2(false);std::string sDownload2 = "http://thrd2URL";
	cButtonEmul btn3(false);std::string sDownload3 = "http://thrd3URL";
	sThreadParam prm1 = {&sDownload1, &btn1};
	sThreadParam prm2 = {&sDownload2, &btn2};
	sThreadParam prm3 = {&sDownload3, &btn3};
    std::thread t1(save_page, prm1);
    std::thread t2(save_page, prm2);
	std::thread t3(save_page, prm3);
    t1.join();
    t2.join();
	t3.join();
 
    g_pages_mutex.lock();  
    std::cout<< sDownload1 <<" btn1 state : "<<std::string(btn1.getState() ? "enabled" : "disabled")<<std::endl;
	std::cout<< sDownload2 <<" btn2 state : "<<std::string(btn2.getState() ? "enabled" : "disabled")<<std::endl;
	std::cout<< sDownload3 <<" btn3 state : "<<std::string(btn3.getState() ? "enabled" : "disabled")<<std::endl;
    g_pages_mutex.unlock();  
    return 0;
}