RACE ? auto assets = list_all_assets(); auto liabilities = list_all_liabilities(); currency_t net_worth; currency_t durable_goods; currency_t long_term_debts; std::thread goods_thread{[&durable_goods calculate_long_term_debts(liabilities); }}; net_worth = calculate_net_worth(assets, liabilities); goods_thread.join(); debts_thread.join(); create_report(net_worth, durable_goods, long_term_debts); RACE ? auto assets = list_all_assets(); auto liabilities = list_all_liabilities(); currency_t net_worth; currency_t durable_goods; currency_t long_term_debts; std::thread goods_thread{[&durable_goods

12 Daniel Anderson -- danielanderson.net Daniel Anderson Assistant Teaching Professor @ CMU danielanderson.net3 Daniel Anderson -- danielanderson.net What we’ll learn today • How shared_ptr is shared_ptr Things we won’t cover • Alias pointers, weak pointers4 Daniel Anderson -- danielanderson.net What we’ll learn today • How shared_ptr is implemented under the hood • Atomics and concurrency Daniel Anderson -- danielanderson.net Why is this important?6 Daniel Anderson -- danielanderson.net Why is this important?7 Daniel Anderson -- danielanderson.net Why is this important?8 Daniel

Copyright © 2023 Andre Kostur net> About Me 2Copyright © 2023 Andre Kostur net> Agenda ● Background ● Core Guidelines ● What is the Rule of Five ● Compiler provided functions Kostur net> C++ is a Value-Based Language 4Copyright © 2023 Andre Kostur net> C++ has a lot to think about 5Copyright © 2023 Andre Kostur net> C++ Core Guidelines Kostur net> Guideline C.21 is “The Rule of Five” 7Copyright © 2023 Andre Kostur net> Simple String 8Copyright © 2023 Andre Kostur net> Simple String - Constructor

12 Daniel Anderson Assistant Teaching Professor @ CMU danielanderson.net Daniel Anderson -- danielanderson.net3 What we’ll learn today • Very quick review of concurrency and lock-free programming danielanderson.net4 Our motivating problem • Required by std::weak_ptr::lock • Also, very useful for atomic memory management / concurrent data structures Daniel Anderson -- danielanderson.net struct “sticky counter” (it gets stuck at zero)5 Our first implementation Daniel Anderson -- danielanderson.net struct Counter { bool increment_if_not_zero() { if (counter > 0) { counter++;

asynchronous functionality within the framework of the Networking TS Examples: std::net::ip::tcp::socket std::net::steady_timer Possibilities: EFVI-based multicast socket Database access layer Printer decltype(auto) async_wait(CompletionToken&& token); }; using async_event = basic_async_eventnet::io_context:: executor_type>; 8Completion Handler Storage Asynchronous operations must store the auto ex = std::net::get_associated_executor(h, ex_); pendings_.emplace_back([h = std::forward(h), ex = std::move(ex)]() mutable { auto alloc = std::net::get_associated_allocator(h);

Who am I? Still at Microsoft, now on the .NET Core runtime team. • https://github.com/dotnet/runtimeWhat is interoperability? Enabling two or more disparate entities to work together. Don’t touch it Simplified Wrapper and Interface Generator (SWIG) – 1996 JVM – Java Native Interface (JNI) – 1997 .NET – Platform Invoke (P/Invoke), COM interop, C++/CLI – 2002, 2005 JVM – Java Native Access (JNA) – 2007 (manual or automatic – see ARC) - Swift - COM – AddRef()/Release() - Non-Reference counted - .NET - JVM - JavaScript Manual memory management is rarely advocated for anymore.Memory model – Manual

Calling source() in /Users/ruben/.conan2/p/zlib0f4e45286ecd1/s/src zlib/1.3: Sources for ['https://zlib.net/fossils/zlib-1.3.tar.gz', 'https://github.com/ ˓→madler/zlib/releases/download/v1.3/zlib-1.3.tar.gz'] artifacts (default=9) core.net.http:cacert_path: Path containing a custom Cacert file core.net.http:clean_system_proxy: If defined, the proxies system env-vars will be␣ ˓→discarded core.net.http:client_cert: Path cert (and key) core.net.http:max_retries: Maximum number of connection retries (requests library) core.net.http:no_proxy_match: List of urls to skip from proxies configuration core.net.http:proxies: Dictionary

g., JavaScript, C++, Objective-C) C++ examples CCured*, CFlat*, CNatural**, Cyclone**, D*, .NET*, Rust*… — C++11/14/17/20/23 Dart* ES 4, Python 3 TypeScript Swift ES 2-10 (except 4) C99/11/17 JavaScript, C++, Objective-C) C++ examples CCured*, CFlat*, CNatural**, Cyclone**, D*, VB.NET*, Rust*… — C++11/14/17/20/23 Dart* ES 4, Python 3 TypeScript Swift ES 2-10 (except 4) C99/11/17 JavaScript, C++, Objective-C) C++ examples CCured*, CFlat*, CNatural**, Cyclone**, D*, VB.NET*, Rust*… — C++11/14/17/20/23 Dart* ES 4, Python 3 TypeScript Swift ES 2-10 (except 4) C99/11/17

Calling source() in /Users/ruben/.conan2/p/zlib0f4e45286ecd1/s/src zlib/1.3: Sources for ['https://zlib.net/fossils/zlib-1.3.tar.gz', 'https://github.com/ ˓→madler/zlib/releases/download/v1.3/zlib-1.3.tar.gz'] artifacts (default=9) core.net.http:cacert_path: Path containing a custom Cacert file core.net.http:clean_system_proxy: If defined, the proxies system env-vars will be␣ ˓→discarded core.net.http:client_cert: Path cert (and key) core.net.http:max_retries: Maximum number of connection retries (requests library) core.net.http:no_proxy_match: List of urls to skip from proxies configuration core.net.http:proxies: Dictionary

Calling source() in /Users/ruben/.conan2/p/zlib0f4e45286ecd1/s/src zlib/1.3: Sources for ['https://zlib.net/fossils/zlib-1.3.tar.gz', 'https://github.com/ ˓→madler/zlib/releases/download/v1.3/zlib-1.3.tar.gz'] artifacts (default=9) core.net.http:cacert_path: Path containing a custom Cacert file core.net.http:clean_system_proxy: If defined, the proxies system env-vars will be␣ ˓→discarded core.net.http:client_cert: Path cert (and key) core.net.http:max_retries: Maximum number of connection retries (requests library) core.net.http:no_proxy_match: List of urls to skip from proxies configuration core.net.http:proxies: Dictionary