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<div class="header-banner topBanner" data-type="header" style="display: block; position: sticky; top: 0; z-index: 999;">
<a data-source="216790" data-banner="226288" class="universal-notice js-universal-notice-notice universal-notice--webp universal-notice--bitrix universal-notice--active" href="https://skillbox.ru/sale/main/?utm_source=media&utm_medium=banners&utm_campaign=all_all_media_banners_banners_header_all_all_skillbox" target="_blank" style="--banner-bg: #5927E9;--banner-color: #fff;--button-font-color: #000000;--button-bg-color: #FFFFFF;--banner-img-left: url(https://cdn.skillbox.pro/mainsite/banners/promo_picture_left/602754/f9ac17dd-a1d4-46c6-aa14-4f7b949defd1.png);--banner-img-left-webp: url(https://cdn.skillbox.pro/mainsite/banners/promo_picture_left/602754/f9ac17dd-a1d4-46c6-aa14-4f7b949defd1.webp);--banner-img-center: url(https://cdn.skillbox.pro/mainsite/banners/promo_picture_center/602507/232fc4a5-b130-4af2-a629-bdb293a4dd2e.png);--banner-img-center-webp: url(https://cdn.skillbox.pro/mainsite/banners/promo_picture_center/602507/232fc4a5-b130-4af2-a629-bdb293a4dd2e.webp);--banner-img-center-mobile: url(https://cdn.skillbox.pro/mainsite/banners/promo_picture_center/602507/232fc4a5-b130-4af2-a629-bdb293a4dd2e.png);--banner-img-center-mobile-webp: url(https://cdn.skillbox.pro/mainsite/banners/promo_picture_center/602507/232fc4a5-b130-4af2-a629-bdb293a4dd2e.webp);--banner-img-right: url(https://cdn.skillbox.pro/mainsite/banners/promo_picture_right/602755/ad7a7fe5-b8d3-47a3-885b-51a7971c12a9.png);--banner-img-right-webp: url(https://cdn.skillbox.pro/mainsite/banners/promo_picture_right/602755/ad7a7fe5-b8d3-47a3-885b-51a7971c12a9.webp);">
<span class="universal-notice__wrapper">
<b class="universal-notice__title">
Скидка до 55% и 3 курса в подарок
</b>
<span class="universal-timer js-universal-notice-timer js-universal-notice-active">
<span class="universal-timer__days js-universal-notice-days">2 дня</span>
<span class="js-universal-notice-hours">13</span>
:<span class="js-universal-notice-minutes">30</span>
:<span class="js-universal-notice-seconds">09</span>
</span>
<span class="universal-notice__button">Выбрать курс</span>
</span>
</a><script>
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deadline.setDate(5);
deadline.setHours(0, 0, 0);
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const elHours = timer.querySelector('.js-universal-notice-hours');
const elMinutes = timer.querySelector('.js-universal-notice-minutes');
const elSeconds = timer.querySelector('.js-universal-notice-seconds');
// Функция обновления таймера
const updateTimer = () => {
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let diff = Math.max(0, deadline - now);
if (diff === 0) {
let lastDayOfMonth = new Date(now.getFullYear(), now.getMonth() + 1, 0);
let lastDay = lastDayOfMonth.getDate();
if (lastDay - now.getDate() < 4) {
deadline.setMonth(deadline.getMonth() + 1, 1);
} else {
deadline.setDate(deadline.getDate() + 4);
}
diff = Math.max(0, deadline - now);
}
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(diff / (1000 * 60 * 60 * 24));
var hours = Math.floor((diff % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60)).toString();
var minutes = Math.floor((diff % (1000 * 60 * 60)) / (1000 * 60)).toString();
var seconds = Math.floor((diff % (1000 * 60)) / 1000).toString();
if (timer) {
let dayTitles = ['день', 'дня', 'дней'];
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elHours.innerHTML = hours.padStart(2, '0');
elMinutes.innerHTML = minutes.padStart(2, '0');
elSeconds.innerHTML = seconds.padStart(2, '0');
}
};
updateTimer();
const timerId = setInterval(updateTimer, 1000);
});
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</div> <div data-area="article" data-title="Многопоточность: неопределённость, дедлоки, лайвлоки, callback hell и другие ужастики / Skillbox Media" class=" noFullClass">
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Иллюстрация: Polina Vari для Skillbox Media </p>
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Антон Сёмин </div>
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Пишет об истории IT, разработке и советской кибернетике. Знает Python, JavaScript и немного C++, но предпочитает писать на русском. </div>
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Подписывайтесь, чтобы не пропустить новые выпуски, голосовать за новые темы, предлагать гостей и присылать свои вопросы для следующих выпусков.</p></div></div><div class="stk-grid valign-bottom stk-theme_26309__mb_05 stk-grid__layout_columns" data-ce-tag="grid"><div data-col-width="3" class="stk-grid-col valign-top" data-ce-tag="grid-col" data-stk-css="" data-stk-css-m=""><figure class="stk-reset sklbx-profile__portrait stk-image-figure stk-theme_26309__mb_0" data-ce-tag="image-figure"><div data-ce-tag="mask" class="stk-mask"><img src="/upload/setka_images/13065727092023_27e9aa5bdf801f94f7728fe14d1ac08405e5a691.png" data-image-id="63411" data-image-name="image1.png" class="stk-image stk-reset" width="1080" height="1075" loading="lazy"/></div></figure></div><div data-col-width="9" class="stk-grid-col stk-grid-col_last valign-bottom" data-ce-tag="grid-col"><h3 class="stk-theme_26309__style_medium_header stk-theme_26309__mb_05 stk-reset" data-ce-tag="paragraph">Алексей Ушаровский</h3><hr class="stk-theme_26309__separator_basic_divider stk-theme_26309__mb_05 stk-reset"/><div class="stk-grid stk-theme_26309__mb_0" data-ce-tag="grid"><div data-col-width="9" class="stk-grid-col valign-top stk-grid-col_last" data-ce-tag="grid-col"><p class="stk-theme_26309__mb_0 stk-reset" data-ce-tag="paragraph">Software Engineer в Oracle.</p></div></div></div></div><hr class="stk-reset stk-theme_26309__separator_divider-1551375397566"/></div></div><div class="stk-grid" data-ce-tag="grid"><div data-col-width="12" class="stk-grid-col stk-grid-col_last" data-ce-tag="grid-col"><h3 class="stk-reset stk-theme_26309__mb_05 stk-theme_26309__style_medium_header" data-ce-tag="paragraph"><strong class="stk-reset">Содержание выпуска</strong></h3><ul class="stk-theme_26309__pad_hor_1 stk-reset" data-ce-tag="list"><li class="stk-reset stk-list-item" data-ce-tag="list-item">Что такое многопоточность и где она используется.</li><li class="stk-reset stk-list-item" data-ce-tag="list-item">Зачем исторически понадобилось распараллеливать вычисления.</li><li class="stk-reset stk-list-item" data-ce-tag="list-item">Какие физические ограничения процессоров позволяет обойти многопоточность.</li><li class="stk-reset stk-list-item" data-ce-tag="list-item">Что такое concurrency, чем она отличается от многопоточности и какие преимущества даёт пользователям.</li><li class="stk-reset stk-list-item" data-ce-tag="list-item">Параллелизм и многопоточность (multithreading) — в чём разница?</li><li class="stk-reset stk-list-item" data-ce-tag="list-item">Почему работа с многопоточностью — это часто взрыв мозга.</li><li class="stk-reset stk-list-item" data-ce-tag="list-item">Что такое дедлок (deadlock) и лайвлок (livelock), как Java Memory Model от них спасает.</li><li class="stk-reset stk-list-item" data-ce-tag="list-item">Асинхронность: что это такое и чем отличается от многопоточности, как реализована в JavaScript. 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class="stk-theme_26309__style_medium_header stk-reset" data-ce-tag="paragraph"><strong class="stk-reset">Полезные ссылки</strong></h3><ul class="stk-theme_26309__pad_hor_1 stk-reset" data-ce-tag="list"><li class="stk-reset stk-list-item" data-ce-tag="list-item"><a href="https://www.youtube.com/watch?v=iB2N8aqwtxc" target="_blank" class="stk-reset">Доклад Алексея Шипилёва про Java Memory Model</a></li><li class="stk-reset stk-list-item" data-ce-tag="list-item"><a href="https://www.youtube.com/watch?v=C6b_dFtujKo&list=PLecCTjz_4ylyyvYExhPAzB4Mqn3Q_kEj6" target="_blank" class="stk-reset">Доклад Алексея Шипилёва «Близкие контакты JMM-степени»</a></li><li class="stk-reset stk-list-item" data-ce-tag="list-item">«<a href="https://www.piter.com/collection/all/product/java-concurrency-na-praktike?ysclid=ln1hku5g47984729844" target="_blank" class="stk-reset">Java Concurrency на практике</a>», Гетц Б., Пайерлс Т., Ли Д.</li></ul><figure class="stk-reset stk-embed_rendered" data-ce-tag="embed"><code class="stk-code"><iframe frameborder="0" style="border:none;width:100%;height:180px;" width="100%" height="180" src="https://music.yandex.ru/iframe/#track/117758112/20602720">Слушайте <a href='https://music.yandex.ru/album/20602720/track/117758112'>Многопоточность: неопределённость, дедлоки, лайвлоки, callback hell и другие ужастики</a> на Яндекс Музыке</iframe></code></figure><div class="stk-theme_26309__mb_15 stk-grid" data-stk-css="stkjt2s7" data-ce-tag="grid"><div data-col-width="12" class="stk-theme_26309__pad_round_1 stk-grid-col stk-grid-col_last" data-ce-tag="grid-col"><p class="stk-theme_26309__style_small_text stk-reset" data-ce-tag="paragraph">Предложить тему, стать гостем подкаста, похвалить или поругать выпуск: <a href="mailto:code.media@skillbox.ru" target="_blank" class="stk-reset">code.media@skillbox.ru</a>, <a href="https://t.me/antoxa_s95" target="_blank" class="stk-reset">t.me/antoxa_s95</a></p></div></div><h3 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Async\/await \u0438 callback hell.\r\n- \u0424\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a RxJava \u0438 \u043f\u0430\u0442\u0442\u0435\u0440\u043d Observer.\r\n- \u041f\u043e\u0447\u0435\u043c\u0443 \u043d\u0435\u043b\u044c\u0437\u044f \u043f\u0440\u043e\u0441\u0442\u043e \u0432\u0437\u044f\u0442\u044c \u0438 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u0442\u044c \r\n\u043f\u043e\u0442\u043e\u043a\u0438?\r\n- \u0418\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u044b \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c\u044e \r\n\u0432 Java: synchronized, \u043c\u0435\u0442\u043e\u0434\u044b wait \u0438 notify, \u043c\u043e\u0434\u0443\u043b\u044c concurrency, semafor \u0438 \u0434\u0440\u0443\u0433\u0438\u0435.\r\n- \u00abKotlin \u2014 \u044d\u0442\u043e Java \u0437\u0434\u043e\u0440\u043e\u0432\u043e\u0433\u043e \u0447\u0435\u043b\u043e\u0432\u0435\u043a\u0430\u00bb.\r\n- \u0417\u0430\u0432\u0438\u0441\u0438\u0442 \u043b\u0438 \u0440\u0430\u0431\u043e\u0442\u0430 \u0441 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c\u044e \r\n\u043e\u0442 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b.\r\n- \u041a\u0430\u043a \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u0430 \u0440\u0430\u0431\u043e\u0442\u0430 \u0441 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c\u044e \r\n\u0432 \u0440\u0430\u0437\u043d\u044b\u0445 \u044f\u0437\u044b\u043a\u0430\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f.\r\n- \u041a\u0430\u043a\u0438\u0435 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u0438, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0435 \u0441 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c\u044e \r\n\u0441\u0435\u0439\u0447\u0430\u0441 \u0430\u043a\u0442\u0438\u0432\u043d\u043e \u043e\u0431\u0441\u0443\u0436\u0434\u0430\u044e\u0442\u0441\u044f \u0438 \u0432\u043d\u0435\u0434\u0440\u044f\u044e\u0442\u0441\u044f.\u041f\u043e\u043b\u0435\u0437\u043d\u044b\u0435 \u0441\u0441\u044b\u043b\u043a\u0438\r\n\r\n- \u0414\u043e\u043a\u043b\u0430\u0434 \u0410\u043b\u0435\u043a\u0441\u0435\u044f \u0428\u0438\u043f\u0438\u043b\u0451\u0432\u0430 \u043f\u0440\u043e Java Memory Model \r\n[ https:\/\/www.youtube.com\/watch?v=iB2N8aqwtxc ] \r\n- \u0414\u043e\u043a\u043b\u0430\u0434 \u0410\u043b\u0435\u043a\u0441\u0435\u044f \u0428\u0438\u043f\u0438\u043b\u0451\u0432\u0430 \u00ab\u0411\u043b\u0438\u0437\u043a\u0438\u0435 \u043a\u043e\u043d\u0442\u0430\u043a\u0442\u044b \r\nJMM-\u0441\u0442\u0435\u043f\u0435\u043d\u0438\u00bb [ https:\/\/www.youtube.com\/watch?v=C6b_dFtujKo&list=PLecCTjz_4ylyyvYExhPAzB4Mqn3Q_kEj6 ] \r\n- \u00abJava Concurrency \u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435 [ https:\/\/www.piter.com\/collection\/all\/product\/java-concurrency-na-praktike?ysclid=ln1hku5g47984729844 ] \r\n\u00bb, \u0413\u0435\u0442\u0446 \u0411., \u041f\u0430\u0439\u0435\u0440\u043b\u0441 \u0422., \u041b\u0438 \u0414.\u0421\u043b\u0443\u0448\u0430\u0439\u0442\u0435 \u041c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c: \u043d\u0435\u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0441\u0442\u044c, \u0434\u0435\u0434\u043b\u043e\u043a\u0438, \u043b\u0430\u0439\u0432\u043b\u043e\u043a\u0438, callback hell \u0438 \u0434\u0440\u0443\u0433\u0438\u0435 \u0443\u0436\u0430\u0441\u0442\u0438\u043a\u0438 \u043d\u0430 \u042f\u043d\u0434\u0435\u043a\u0441 \u041c\u0443\u0437\u044b\u043a\u0435\r\n\r\n\r\n\r\n\u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u0442\u044c \u0442\u0435\u043c\u0443, \u0441\u0442\u0430\u0442\u044c \u0433\u043e\u0441\u0442\u0435\u043c \u043f\u043e\u0434\u043a\u0430\u0441\u0442\u0430, \r\n\u043f\u043e\u0445\u0432\u0430\u043b\u0438\u0442\u044c \u0438\u043b\u0438 \u043f\u043e\u0440\u0443\u0433\u0430\u0442\u044c \u0432\u044b\u043f\u0443\u0441\u043a: code.media@skillbox.ru [ mailto:code.media@skillbox.ru ] , t.me\/antoxa_s95 \u0421\u043b\u0443\u0448\u0430\u0442\u044c \u0432\u044b\u043f\u0443\u0441\u043a\r\n\r\n\r\n\r\n- mave \r\n- \u00ab\u042f\u043d\u0434\u0435\u043a\u0441 \u041c\u0443\u0437\u044b\u043a\u0430 \r\n\u00bb\r\n- Apple Podcasts [ https:\/\/podcasts.apple.com\/us\/podcast\/%D0%BC%D0%BD%D0%BE%D0%B3%D0%BE%D0%BF%D0%BE%D1%82%D0%BE%D1%87%D0%BD%D0%BE%D1%81%D1%82%D1%8C-%D0%BD%D0%B5%D0%BE%D0%BF%D1%80%D0%B5%D0%B4%D0%B5%D0%BB%D1%91%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D1%8C-%D0%B4%D0%B5%D0%B4%D0%BB%D0%BE%D0%BA%D0%B8-%D0%BB%D0%B0%D0%B9%D0%B2%D0%BB%D0%BE%D0%BA%D0%B8-callback\/id1604736632?i=1000629385789 ]\r\n \r\n- Castbox [ https:\/\/castbox.fm\/episode\/%D0%9C%D0%BD%D0%BE%D0%B3%D0%BE%D0%BF%D0%BE%D1%82%D0%BE%D1%87%D0%BD%D0%BE%D1%81%D1%82%D1%8C%3A-%D0%BD%D0%B5%D0%BE%D0%BF%D1%80%D0%B5%D0%B4%D0%B5%D0%BB%D1%91%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D1%8C%2C-%D0%B4%D0%B5%D0%B4%D0%BB%D0%BE%D0%BA%D0%B8%2C-%D0%BB%D0%B0%D0%B9%D0%B2%D0%BB%D0%BE%D0%BA%D0%B8%2C-callback-hell-%D0%B8-%D0%B4%D1%80%D1%83%D0%B3%D0%B8%D0%B5-%D1%83%D0%B6%D0%B0%D1%81%D1%82%D0%B8%D0%BA%D0%B8-id4744119-id635617244?country=ru ]\r\n \r\n\r\n\r\n- YouTube [ https:\/\/youtu.be\/TInMd7osc2s?si=sDk4ApKsANLf8HT2 ] \r\n- Google [ https:\/\/podcasts.google.com\/feed\/aHR0cHM6Ly9jbG91ZC5tYXZlLmRpZ2l0YWwvMzQ5Mzc\/episode\/MTVkZWRmZGUtMjExYi00NGM4LWI4NjItMmZiNDEzMDk0MzM1?sa=X&ved=0CAUQkfYCahcKEwjYpqPvv8yBAxUAAAAAHQAAAAAQAQ ]\r\n \r\n- VK \r\n\r\n\r\n\r\n \r\n\r\n\r\n\u041d\u0430\u0448 \u043f\u043e\u0434\u043a\u0430\u0441\u0442 \u0443\u0434\u043e\u0431\u043d\u043e \u0441\u043b\u0443\u0448\u0430\u0442\u044c \u043d\u0430 \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u044b\u0445 \r\n\u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\u0445:\r\n\r\n- Castbox \r\n- \u00ab\u042f\u043d\u0434\u0435\u043a\u0441 \u041c\u0443\u0437\u044b\u043a\u0430 \u00bb\r\n- Apple Podcasts \r\n- Google Podcasts \r\n\r\n\u041f\u043e\u0434\u043f\u0438\u0441\u044b\u0432\u0430\u0439\u0442\u0435\u0441\u044c, \u0441\u0442\u0430\u0432\u044c\u0442\u0435 \u043b\u0430\u0439\u043a\u0438, \u0434\u0435\u043b\u0438\u0442\u0435\u0441\u044c \r\n\u0441 \u0434\u0440\u0443\u0437\u044c\u044f\u043c\u0438 \u0438 \u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0439\u0442\u0435 \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0438!\r\n\r\n \r\n\r\n \r\n\r\n\r\n\u0411\u043e\u043b\u044c\u0448\u0435 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e\u0433\u043e \u043f\u0440\u043e \u043a\u043e\u0434 \u2014 \u0432 \u043d\u0430\u0448\u0435\u043c \r\n\u0442\u0435\u043b\u0435\u0433\u0440\u0430\u043c-\u043a\u0430\u043d\u0430\u043b\u0435 . \u041f\u043e\u0434\u043f\u0438\u0441\u044b\u0432\u0430\u0439\u0442\u0435\u0441\u044c!","author":{"@type":"Person","name":"\u0410\u043d\u0442\u043e\u043d \u0421\u0451\u043c\u0438\u043d","url":"https:\/\/skillbox.ru\/media\/authors\/anton-semin\/"},"publisher":{"@type":"Organization","name":"Skillbox","logo":{"@type":"ImageObject","url":"https:\/\/skillbox.ru\/static\/images\/skillbox.png"}},"mainEntityOfPage":{"@type":"WebPage","url":"https:\/\/skillbox.ru\/media\/code\/mnogopotochnost-neopredelyennost-dedloki-layvloki-callback-hell-i-drugie-uzhastiki\/"},"datePublished":"2023-09-28T07:10:00Z","dateModified":"2023-09-28T07:11:56Z","image":{"@type":"ImageObject","url":["https:\/\/248006.selcdn.ru\/main\/iblock\/058\/058a9e68ca5b8732e79f89ed24dcfedd\/9ce4f41cacaa932ba35e609c40db9522.png"]},"description":"\u041f\u043e\u0434\u043a\u0430\u0441\u0442 \u00ab\u041b\u044e\u0434\u0438 \u0438 \u043a\u043e\u0434\u00bb, \u0432\u044b\u043f\u0443\u0441\u043a \u2116 88: \u0410\u043b\u0435\u043a\u0441\u0435\u0439 \u0423\u0448\u0430\u0440\u043e\u0432\u0441\u043a\u0438\u0439."}
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