C++ (Cpp) condition_variable Examples

Example #1

File: test_condition_variable_dispatch.cpp Project: LocutusOfBorg/poedit

void fn1( boost::fibers::mutex & m, boost::fibers::condition_variable & cv) {
    std::unique_lock< boost::fibers::mutex > lk( m);
    BOOST_CHECK(test2 == 0);
    test1 = 1;
    cv.notify_one();
    while (test2 == 0) {
        cv.wait(lk);
    }
    BOOST_CHECK(test2 != 0);
}

Example #2

File: test_condition_variable_dispatch.cpp Project: LocutusOfBorg/poedit

void wait_fn(
	boost::fibers::mutex & mtx,
	boost::fibers::condition_variable & cond) {
	std::unique_lock< boost::fibers::mutex > lk( mtx);
	cond.wait( lk);
	++value1;
}

Example #3

File: test_condition_mt_post.cpp Project: alexeykuzmin0/ThePlatform

void wait_fn( boost::barrier & b,
              boost::fibers::mutex & mtx,
              boost::fibers::condition_variable & cond,
              bool & flag) {
    b.wait();
	std::unique_lock< boost::fibers::mutex > lk( mtx);
	cond.wait( lk, [&flag](){ return flag; });
	++value;
}

Example #4

File: test_condition_mt_post.cpp Project: alexeykuzmin0/ThePlatform

void notify_all_fn( boost::barrier & b,
                    boost::fibers::mutex & mtx,
                    boost::fibers::condition_variable & cond,
                    bool & flag) {
    b.wait();
	std::unique_lock< boost::fibers::mutex > lk( mtx);
    flag = true;
    lk.unlock();
	cond.notify_all();
}

Example #5

File: test_condition_variable_dispatch.cpp Project: LocutusOfBorg/poedit

void fn5( boost::fibers::mutex & m, boost::fibers::condition_variable & cv) {
    std::unique_lock< boost::fibers::mutex > lk( m);
    BOOST_CHECK(test2 == 0);
    test1 = 1;
    cv.notify_one();
    std::chrono::steady_clock::time_point t0 = std::chrono::steady_clock::now();
    int count=0;
    cv.wait_for(lk, ms(250), Pred(test2));
    count++;
    std::chrono::steady_clock::time_point t1 = std::chrono::steady_clock::now();
    if (runs == 0) {
        BOOST_CHECK(t1 - t0 < ms(250+1000));
        BOOST_CHECK(test2 != 0);
    } else {
        BOOST_CHECK(t1 - t0 - ms(250) < ms(count*250+100));
        BOOST_CHECK(test2 == 0);
    }
    ++runs;
}

Example #6

File: test_condition_variable_dispatch.cpp Project: LocutusOfBorg/poedit

void fn3( boost::fibers::mutex & m, boost::fibers::condition_variable & cv) {
    std::unique_lock< boost::fibers::mutex > lk( m);
    BOOST_CHECK(test2 == 0);
    test1 = 1;
    cv.notify_one();
    std::chrono::steady_clock::time_point t0 = std::chrono::steady_clock::now();
    std::chrono::steady_clock::time_point t = t0 + ms(250);
    bool r = cv.wait_until(lk, t, Pred(test2));
    std::chrono::steady_clock::time_point t1 = std::chrono::steady_clock::now();
    if (runs == 0) {
        BOOST_CHECK(t1 - t0 < ms(250));
        BOOST_CHECK(test2 != 0);
        BOOST_CHECK(r);
    } else {
        BOOST_CHECK(t1 - t0 - ms(250) < ms(250+100));
        BOOST_CHECK(test2 == 0);
        BOOST_CHECK(!r);
    }
    ++runs;
}

Example #7

File: test_condition_variable_dispatch.cpp Project: LocutusOfBorg/poedit

void fn2( boost::fibers::mutex & m, boost::fibers::condition_variable & cv) {
    std::unique_lock< boost::fibers::mutex > lk( m);
    BOOST_CHECK(test2 == 0);
    test1 = 1;
    cv.notify_one();
    std::chrono::system_clock::time_point t0 = std::chrono::system_clock::now();
    std::chrono::system_clock::time_point t = t0 + ms(250);
    int count=0;
    while (test2 == 0 && cv.wait_until(lk, t) == boost::fibers::cv_status::no_timeout)
        count++;
    std::chrono::system_clock::time_point t1 = std::chrono::system_clock::now();
    if (runs == 0) {
        BOOST_CHECK(t1 - t0 < ms(250));
        BOOST_CHECK(test2 != 0);
    } else {
        BOOST_CHECK(t1 - t0 - ms(250) < ms(count*250+100+1000));
        BOOST_CHECK(test2 == 0);
    }
    ++runs;
}

Example #8

File: future-fiber.cpp Project: dmlys/testdev-extlib

	bool fiber_waiter::wait_ready(std::chrono::steady_clock::duration timeout_duration) noexcept
	{
		if (gth_thread_type == thread_type::thread)
		{
			std::unique_lock<std::mutex> lk(m_thread_mutex);
			return m_thread_var.wait_for(lk, timeout_duration, [this] { return m_ready.load(std::memory_order_relaxed); });
		}
		else
		{
			std::unique_lock<boost::fibers::mutex> lk(m_fiber_mutex);
			return m_fiber_var.wait_for(lk, timeout_duration, [this] { return m_ready.load(std::memory_order_relaxed); });
		}
	}

Example #9

File: future-fiber.cpp Project: dmlys/testdev-extlib

	void fiber_waiter::wait_ready() noexcept
	{
		if (gth_thread_type == thread_type::thread)
		{
			std::unique_lock<std::mutex> lk(m_thread_mutex);
			return m_thread_var.wait(lk, [this] { return m_ready.load(std::memory_order_relaxed); });
		}
		else
		{
			std::unique_lock<boost::fibers::mutex> lk(m_fiber_mutex);
			return m_fiber_var.wait(lk, [this] { return m_ready.load(std::memory_order_relaxed); });
		}
	}

Example #10

File: future-fiber.cpp Project: dmlys/testdev-extlib

	void fiber_waiter::continuate(shared_state_basic * caller) noexcept
	{
		m_ready.store(true, std::memory_order_relaxed);
		m_thread_var.notify_all();
		m_fiber_var.notify_all();
	}

Example #11

File: test_condition_variable_dispatch.cpp Project: LocutusOfBorg/poedit

void notify_all_fn( boost::fibers::condition_variable & cond) {
	cond.notify_all();
}