Allow a single-threaded server handling multiple clients. • Use the sender/receiver asynchronous framework. • Use a minimalistic sender/receiver networking interface ObjectiveTechAtBloomberg.com © 2024 reserved. • std::execution (sender/receiver): http://wg21.link/p2300 • https://github.com/NVIDIA/stdexec.git • https://github.com/beman-project/execution26 • Sender/receiver networking: http://wg21

Sender Patterns to Wrangle Sender Patterns to Wrangle Concurrency in Embedded Devices Concurrency in Embedded Devices Michael Caisse Michael Caisse michael.caisse@intel.com michael.caisse@intel.com Timer 1 Timer 2 I2C DMA Half-Duplex Serial core 9Sender World View 10Sender 11Composition 12Potential Energy 13Do Something 14Sender Chain Contains State 15The Players 16Intel Baremetal Senders just_error_result_of just_stopped Sender Factories Functions that return senders. auto sndr = async::just(42, 17); 1 18just just_result_of just_error just_error_result_of just_stopped Sender Factories Functions

represent: • A handle to a compute resource (aka, scheduler) • A unit of lazy async work (aka, sender) • A completion handler (aka, receiver) • A small, initial set of generic async algorithms: • { unifex::static_thread_pool pool{8}; ex::scheduler auto sched = pool.get_scheduler(); ex::sender auto work = ex::when_all( ex::then(ex::schedule(sched), [] { return compute_intensive(0); { unifex::static_thread_pool pool{8}; ex::scheduler auto sched = pool.get_scheduler(); ex::sender auto work = ex::when_all( ex::then(ex::schedule(sched), [] { return compute_intensive(0);

emo/libunifex/include/unifex/task.hpp:824 frame #5 : 0x000055555557add3 in unifex::_await::_sender_tasksender_tasksender::type:: frame #13: 0x000055555557dc9c in unifex::_await::_sender_tas

purpose of the email is to inform the recipient of a bug in the contact form on their website. The sender also mentions that they enjoy reading the website and that they are leaving the bug in place for the credibility of the sender.** The sender of the email claims to be a hacker named Harry. However, there is no way to verify the sender’s identity. It is possible that the sender is a legitimate hacker hacker who is trying to help the recipient, but it is also possible that the sender is a malicious actor who is trying to trick the recipient into clicking on a malicious link or downloading a malicious

� � �� � � � � � 59.1 Senders � Receivers � � � � � � � � Rust � � � � � � � � � � � � � � � : SenderSender and SyncSender implement Clone (so you can make multiple producers) but Receiver does not . • send() and recv() return Result. If they return Err, it means the counterpart Sender or Receiver < : � � � � � � � � � � � � � � � � � � � � � � � � � atomic reference � � thread-safe . • mpsc::Sender

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хвилини Зав'язані канали 10 хвилин 58.1 Відправники та отримувачі Канали Rust мають дві частини: Sender і Receiver. Дві частини з’єднані через канал, але ви бачите лише кінцеві точки. use std::sync::mpsc; rx.recv()); } • mpsc означає багато виробників, один споживач (Multi-Producer, Single-Consumer). Sender і SyncSender реалізують Clone (тобто ви можете створити кілька виробників), а Receiver — ні. • send() send() і recv() повертають Result. Якщо вони повертають Err, це означає, що відповідний Sender або Receiver видалено, а канал закрито. 341 58.2 Незав'язані канали Ви отримуєте необмежений і асинхронний

Receive(ActorId sender, Message message, void* arguments) override { switch (message) { case MESSAGE_FOO_REQUEST: auto* request = (FooRequest*) arguments; ... Send(sender, MESSAGE_FOO_RESPONSE Receive(ActorId sender, Message message, void* arguments) override { switch (message) { case MESSAGE_FOO_REQUEST: auto* request = (FooRequest*) arguments; ... Send(sender, MESSAGE_FOO_RESPONSE Receive(ActorId sender, Message message, void* arguments) override { switch (message) { case MESSAGE_FOO_REQUEST: auto* request = (FooRequest*) arguments; ... Send(sender, MESSAGE_FOO_RESPONSE

此时须遵守常规 Rust 借用规则：你可以通过一个线程以可变的方式借用，也可以通过任意数量的 线程以不可变的方式借用。 309 第 59 部分 通道 Rust 通道（Channel）包含两个部分：Sender 和 Receiver。这两个部分通过通道进行连接， 但你只能看到端点。 use std::sync::mpsc; fn main() { let (tx, rx) = mpsc::channel(); }", rx.recv()); } • mpsc 代表多个生产方，单个使用方。Sender 和 SyncSender 会实现 Clone（因此，你可以设 置多个生产方），但 Receiver 不会实现。 • send() 和 recv() 会返回 Result。如果它们返回 Err，则表示对应的 Sender 或 Receiver 已被丢弃，且通道已关闭。 59.1 无界通道 你可以使用 }… • String、Option、Vec、Box… • Arc：明确通过原子引用计数实现线程安全。 • Mutex：明确通过内部锁定实现线程安全。 • mpsc::Sender: As of 1.72.0. • AtomicBool、AtomicU8…：使用特殊的原子指令。 当类型参数为 Send + Sync 时，泛型类型通常 为 Send + Sync。

minutes Bounded Channels 10 minutes 58.1 Senders and Receivers Rust channels have two parts: a Sender and a Receiver. The two parts are connected via the channel, but you only see the end-points Single-Consumer. Sender and SyncSender implement Clone (so you can make multiple producers) but Receiver does not. • send() and recv() return Result. If they return Err, it means the counterpart Sender or Receiver thread-safe via atomic reference count. • Mutex: Explicitly thread-safe via internal locking. • mpsc::Sender: As of 1.72.0. • AtomicBool, AtomicU8, ...: Uses special atomic instructions. The generic types