Reply to Problem mit boost::thread on Fri, 06 Aug 2010 19:53:41 GMT

dsfdsfsfd — Fri, 06 Aug 2010 19:53:41 GMT

#include 
#include 

boost::mutex io_mutex; // The iostreams are not guaranteed to be thread-safe!
const size_t myarray_max_size = 100;
unsigned long myarray[myarray_max_size];
size_t myarray_size;

class counter
{
public:
    counter() : count(0) { }

    int increment() {
        boost::mutex::scoped_lock scoped_lock(mutex);
        return ++count;
    }

private:
    boost::mutex mutex;
    int count;
};

counter c;

class myclass
{
	void change_count()
	{
		int thread_number = c.increment();

		do {
			const size_t mylocalarray_size = 2;
			unsigned long mylocalarray[mylocalarray_size];
			for (size_t i = 0; i < mylocalarray_size; ++i)
			{
				mylocalarray[i] = rand();

				boost::xtime xt;
				boost::xtime_get(&xt, boost::TIME_UTC);
				xt.nsec += 1000;
				boost::thread::sleep(xt);
			}

			boost::mutex::scoped_lock scoped_lock(io_mutex);
			std::cout << "Thread #" << thread_number << std::endl;
			for (size_t i = 0; (myarray_size < myarray_max_size) && (i < mylocalarray_size); ++i, ++myarray_size)
				myarray[myarray_size] = mylocalarray[i];
		} while (myarray_size < myarray_max_size);
	}

public:
	void main()
	{
		myarray_size = 0;

		const int num_threads = 2;
		boost::thread_group thrds;
		for (int i = 0; i < num_threads; ++i)
			thrds.create_thread(&myclass::change_count);

		do {
			boost::xtime xt;
			boost::xtime_get(&xt, boost::TIME_UTC);
			xt.nsec += 1000;
			boost::thread::sleep(xt);

			boost::mutex::scoped_lock scoped_lock(io_mutex);
		} while (myarray_size < myarray_max_size);

		thrds.join_all();

		std::cout << "Alle beendet" << std::endl;
	}
};

int main()
{
	myclass a;
	a.main();

	char c;
	std::cin >> c;
}

macht folgenden Fehler

1>C:\Users\Bla\Documents\Visual Studio 2010\Projects\boost_1_43_0\boost/thread/detail/thread.hpp(59): error C2064: term does not evaluate to a function taking 0 arguments
1>          C:\Users\Bla\Documents\Visual Studio 2010\Projects\boost_1_43_0\boost/thread/detail/thread.hpp(58) : while compiling class template member function 'void boost::detail::thread_data::run(void)'
1>          with
1>          [
1>              F=void (__cdecl myclass::* )(void)
1>          ]
1>          C:\Users\Bla\Documents\Visual Studio 2010\Projects\boost_1_43_0\boost/thread/detail/thread.hpp(129) : see reference to class template instantiation 'boost::detail::thread_data' being compiled
1>          with
1>          [
1>              F=void (__cdecl myclass::* )(void)
1>          ]
1>          C:\Users\Bla\Documents\Visual Studio 2010\Projects\boost_1_43_0\boost/thread/detail/thread.hpp(160) : see reference to function template instantiation 'boost::detail::thread_data_ptr boost::thread::make_thread_info(void)' being compiled
1>          with
1>          [
1>              F=void (__cdecl myclass::* )(void)
1>          ]
1>          C:\Users\Bla\Documents\Visual Studio 2010\Projects\boost_1_43_0\boost/thread/detail/thread_group.hpp(39) : see reference to function template instantiation 'boost::thread::thread(F,boost::thread::dummy *)' being compiled
1>          with
1>          [
1>              F=void (__cdecl myclass::* )(void)
1>          ]
1>          main.cpp(148) : see reference to function template instantiation 'boost::thread *boost::thread_group::create_thread(F)' being compiled
1>          with
1>          [
1>              F=void (__cdecl myclass::* )(void)
1>          ]

(Zeilennummern stimmen nicht)

Das Problem ist, dass die Thread-Funktion eine Memberfunktion meiner Klasse ist. Wie kann ich das lösen?

Reply to Problem mit boost::thread on Fri, 06 Aug 2010 19:56:29 GMT

l'abra d'or — Fri, 06 Aug 2010 19:56:29 GMT

boost::bind

Reply to Problem mit boost::thread on Fri, 06 Aug 2010 20:00:11 GMT

dsdffsdf — Fri, 06 Aug 2010 20:00:11 GMT

Danke! und wie genau damit?

Reply to Problem mit boost::thread on Fri, 06 Aug 2010 20:13:34 GMT

l'abra d'or — Fri, 06 Aug 2010 20:13:34 GMT

dsdffsdf schrieb:

Danke! und wie genau damit?

Es sind mittlerweile 13 Minuten vergangen und du hast immer noch nicht nach "boost::thread mit boost::bind" gegoogelt?

Reply to Problem mit boost::thread on Fri, 06 Aug 2010 20:16:57 GMT

dfgfdg — Fri, 06 Aug 2010 20:16:57 GMT

Danke, ich hatte nur nach boost::bind gesucht!