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);

drive letter to that shared folder. Alternatively, on the Windows command line, use the following: net use x: \\vboxsvr\sharename While vboxsvr is a fixed name (note that vboxsrv would also work), replace /VirtualBox/GuestInfo/Net/Count, value: 1, timestamp: 1229099826299785000, flags: Name: /VirtualBox/HostInfo/GUI/LanguageID, value: C, timestamp: 1229098151272771000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/IP, 1229099826300088000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Broadcast, value: 255.255.255.255, timestamp: 1229099826300220000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Netmask, value: 255.255.255.0, timestamp:

drive letter to that shared folder. Alternatively, on the Windows command line, use the following: net use x: \\vboxsvr\sharename While vboxsvr is a fixed name (note that vboxsrv would also work), replace /VirtualBox/GuestInfo/Net/Count, value: 1, timestamp: 1229099826299785000, flags: Name: /VirtualBox/HostInfo/GUI/LanguageID, value: C, timestamp: 1229098151272771000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/IP, 1229099826300088000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Broadcast, value: 255.255.255.255, timestamp: 1229099826300220000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Netmask, value: 255.255.255.0, timestamp:

drive letter to that shared folder. Alternatively, on the Windows command line, use the following: net use x: \\vboxsvr\sharename While vboxsvr is a fixed name (note that vboxsrv would also work), replace /VirtualBox/GuestInfo/Net/Count, value: 1, timestamp: 1229099826299785000, flags: Name: /VirtualBox/HostInfo/GUI/LanguageID, value: C, timestamp: 1229098151272771000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/IP, 1229099826300088000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Broadcast, value: 255.255.255.255, timestamp: 1229099826300220000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Netmask, value: 255.255.255.0, timestamp:

drive letter to that shared folder. Alternatively, on the Windows command line, use the following: net use x: \\vboxsvr\sharename While vboxsvr is a fixed name (note that vboxsrv would also work), replace /VirtualBox/GuestInfo/Net/Count, value: 1, timestamp: 1229099826299785000, flags: Name: /VirtualBox/HostInfo/GUI/LanguageID, value: C, timestamp: 1229098151272771000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/IP, 1229099826300088000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Broadcast, value: 255.255.255.255, timestamp: 1229099826300220000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Netmask, value: 255.255.255.0, timestamp:

drive letter to that shared folder. Alternatively, on the Windows command line, use the following: net use x: \\vboxsvr\sharename While vboxsvr is a fixed name (note that vboxsrv would also work), replace /VirtualBox/GuestInfo/Net/Count, value: 1, timestamp: 1229099826299785000, flags: Name: /VirtualBox/HostInfo/GUI/LanguageID, value: C, timestamp: 1229098151272771000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/IP, 1229099826300088000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Broadcast, value: 255.255.255.255, timestamp: 1229099826300220000, flags: Name: /VirtualBox/GuestInfo/Net/0/V4/Netmask, value: 255.255.255.0, timestamp: