Adonis  Kerluke

Adonis Kerluke

1617412480

Crust of Rust: Atomics and Memory Ordering

In this episode of Crust of Rust, we go over Rust’s atomic types, including the mysterious Ordering enum. In particular, we explore the std::sync::atomic module, and look at how its components can be used to implement concurrency primitives like mutexes. We also investigate some of the gotchas and sometimes counter-intuitive behaviors of the atomic primitives with different memory orderings, as well as strategies for testing for and debugging errors in concurrent code.

  • 0:00:00 Introduction
  • 0:02:03 What are atomics?
  • 0:05:26 The Memory Model
  • 0:07:33 AtomicUsize
  • 0:12:23 Questions so far
  • 0:20:20 Implementing a (bad) Mutex
  • 0:27:39 Our Mutex works!
  • 0:33:04 Pesky thread interleavings
  • 0:39:42 compare_exchange
  • 0:44:54 Mitigating compare_exchange contention
  • 0:50:43 compare_exchange_weak
  • 0:57:02 Ordering::Relaxed
  • 1:12:13 Ordering::Acquire/Release
  • 1:26:00 The fetch_ methods
  • 1:34:07 Ordering::SeqCst
  • 2:00:08 Breather
  • 2:00:40 ThreadSanitizer
  • 2:05:49 loom
  • 2:22:09 Atomic fences
  • 2:27:27 volatile
  • 2:32:18 AtomicPtr
  • 2:35:13 Atomics through FFI
  • 2:36:44 Consume ordering?
  • 2:38:08 Closing thoughts

#rust

What is GEEK

Buddha Community

Crust of Rust: Atomics and Memory Ordering

Serde Rust: Serialization Framework for Rust

Serde

*Serde is a framework for serializing and deserializing Rust data structures efficiently and generically.*

You may be looking for:

Serde in action

Click to show Cargo.toml. Run this code in the playground.

[dependencies]

# The core APIs, including the Serialize and Deserialize traits. Always
# required when using Serde. The "derive" feature is only required when
# using #[derive(Serialize, Deserialize)] to make Serde work with structs
# and enums defined in your crate.
serde = { version = "1.0", features = ["derive"] }

# Each data format lives in its own crate; the sample code below uses JSON
# but you may be using a different one.
serde_json = "1.0"

 

use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize, Debug)]
struct Point {
    x: i32,
    y: i32,
}

fn main() {
    let point = Point { x: 1, y: 2 };

    // Convert the Point to a JSON string.
    let serialized = serde_json::to_string(&point).unwrap();

    // Prints serialized = {"x":1,"y":2}
    println!("serialized = {}", serialized);

    // Convert the JSON string back to a Point.
    let deserialized: Point = serde_json::from_str(&serialized).unwrap();

    // Prints deserialized = Point { x: 1, y: 2 }
    println!("deserialized = {:?}", deserialized);
}

Getting help

Serde is one of the most widely used Rust libraries so any place that Rustaceans congregate will be able to help you out. For chat, consider trying the #rust-questions or #rust-beginners channels of the unofficial community Discord (invite: https://discord.gg/rust-lang-community), the #rust-usage or #beginners channels of the official Rust Project Discord (invite: https://discord.gg/rust-lang), or the #general stream in Zulip. For asynchronous, consider the [rust] tag on StackOverflow, the /r/rust subreddit which has a pinned weekly easy questions post, or the Rust Discourse forum. It's acceptable to file a support issue in this repo but they tend not to get as many eyes as any of the above and may get closed without a response after some time.

Download Details:
Author: serde-rs
Source Code: https://github.com/serde-rs/serde
License: View license

#rust  #rustlang 

Origin Scale

Origin Scale

1616572311

Originscale Order Management System

Originscale order management software helps to manage all your orders across channels in a single place. Originscale collects orders across multiple channels in real-time - online, offline, D2C, B2B, and more. View all your orders in one single window and process them with a simple click.

#order management system #ordering management system #order management software #free order management software #purchase order management software #best order management software

Awesome  Rust

Awesome Rust

1650488460

Atom Ide Rust: Rust IDE Support for Atom

IDE-Rust

Rust language support for Atom-IDE, powered by rust-analyzer.

Features

  • Auto-completion
  • Diagnostics (errors and warnings from rustc)
  • Document outline
  • Go to definition (ctrl or cmd click)
  • Type information and Documentation on hover (hold ctrl or cmd for more information)
  • Find references (ctrl-alt-shift-f or cmd-opt-shift-f also in context menu)
  • Format file with rustfmt (ctrl-shift-c or cmd-shift-c also in context menu)
  • Format on save (disabled by default, see atom-ide-ui settings)
  • Rustup toolchain update checking at startup & every 6 hours thereafter
  • Supports rustup override toolchains
  • Rust language snippets

Install

Install from Settings view by searching for ide-rust, or with the command line:

$ apm install ide-rust

Prerequisites

rust-analyzer must be installed manually, if possible on the PATH (otherwise configure this in the package settings). See https://rust-analyzer.github.io/manual.html#rust-analyzer-language-server-binary.

NOTE: On Windows, you can install it using choco: choco install rust-analyzer

No other packages or manual setup is required as these will be handled with user prompts after install. However, you may wish to install rustup with your OS package manager instead of following prompts to install via rustup.rs.

Configure rust-analyzer

rust-analyzer settings can be stored in a JSON file in the project directory.

It first looks for rust-analyzer.json. If the file does not exists, it then checks .config/rust-analyzer.json.

Refer to the rust-analyzer User Manual for the supported config options.

Examples

enable proc-macro support (from the User Manual)

{
    "cargo": {
        "loadOutDirsFromCheck": true,
    },
    "procMacro": {
        "enable": true,
    }
}

configure rust-fmt

{
    "rustfmt": {
        "extraArgs": ["+nightly"]
    }
}

Commands

  • ide-rust:restart-all-language-servers Restart all currently active Rls processes

Debugging IDE-Rust

If stuff isn't working you can try enabling logging to debug:

  • Open the atom console (ctrl-shift-i)
  • Enter atom.config.set('core.debugLSP', true)
  • Reload atom (ctrl-shift-F5)

This will spit out language server message logging into the atom console. Check if requests/responses are being sent or are incorrect.

RLS

RLS is no longer supported. To use RLS install a previous version of ide-rust, apm install ide-rust@0.21.2.

Screenshots

Autocomplete:

Autocomplete image

Datatips:

Datatips image

Linter:

Linter image

Outline:

Outline image

Download Details:
Author: rust-lang
Source Code: https://github.com/rust-lang/atom-ide-rust
License: MIT License

#rust  #rustlang  #ide #javascript #atom 

Adonis  Kerluke

Adonis Kerluke

1617412480

Crust of Rust: Atomics and Memory Ordering

In this episode of Crust of Rust, we go over Rust’s atomic types, including the mysterious Ordering enum. In particular, we explore the std::sync::atomic module, and look at how its components can be used to implement concurrency primitives like mutexes. We also investigate some of the gotchas and sometimes counter-intuitive behaviors of the atomic primitives with different memory orderings, as well as strategies for testing for and debugging errors in concurrent code.

  • 0:00:00 Introduction
  • 0:02:03 What are atomics?
  • 0:05:26 The Memory Model
  • 0:07:33 AtomicUsize
  • 0:12:23 Questions so far
  • 0:20:20 Implementing a (bad) Mutex
  • 0:27:39 Our Mutex works!
  • 0:33:04 Pesky thread interleavings
  • 0:39:42 compare_exchange
  • 0:44:54 Mitigating compare_exchange contention
  • 0:50:43 compare_exchange_weak
  • 0:57:02 Ordering::Relaxed
  • 1:12:13 Ordering::Acquire/Release
  • 1:26:00 The fetch_ methods
  • 1:34:07 Ordering::SeqCst
  • 2:00:08 Breather
  • 2:00:40 ThreadSanitizer
  • 2:05:49 loom
  • 2:22:09 Atomic fences
  • 2:27:27 volatile
  • 2:32:18 AtomicPtr
  • 2:35:13 Atomics through FFI
  • 2:36:44 Consume ordering?
  • 2:38:08 Closing thoughts

#rust

Rust Lang Course For Beginner In 2021: Guessing Game

 What we learn in this chapter:
- Rust number types and their default
- First exposure to #Rust modules and the std::io module to read input from the terminal
- Rust Variable Shadowing
- Rust Loop keyword
- Rust if/else
- First exposure to #Rust match keyword

=== Content:
00:00 - Intro & Setup
02:11 - The Plan
03:04 - Variable Secret
04:03 - Number Types
05:45 - Mutability recap
06:22 - Ask the user
07:45 - First intro to module std::io
08:29 - Rust naming conventions
09:22 - Read user input io:stdin().read_line(&mut guess)
12:46 - Break & Understand
14:20 - Parse string to number
17:10 - Variable Shadowing
18:46 - If / Else - You Win, You Loose
19:28 - Loop
20:38 - Match
23:19 - Random with rand
26:35 - Run it all
27:09 - Conclusion and next episode

#rust