Commit c99003a
More thread ideas
Changed files (15)
modifiedexamples/threads/src/thread.rsaddedexamples/threads2/Cargo.lockaddedexamples/threads2/Cargo.tomladdedexamples/threads2/LICENSE-APACHEaddedexamples/threads2/README.mdaddedexamples/threads2/build.shaddedexamples/threads2/run.shaddedexamples/threads2/rust-toolchain.tomladdedexamples/threads2/server.pyaddedexamples/threads2/src/lib.rsaddedexamples/threads2/src/main_component.rsaddedexamples/threads2/src/thread.rsaddedexamples/threads2/static/index.htmladdedexamples/threads2/static/index.jsaddedexamples/threads2/static/worker.js
Diff
@@ -15,7 +15,7 @@ struct Work { fn spawn_worker() -> Result<Worker, JsValue> { let worker = Worker::new("./worker.js")?; - // A worker spun up send it the module and memory so it can start+ // When a worker is spun up send it the module and memory so it can start // instantiating the Wasm module. let array = js_sys::Array::new();new file mode 100644@@ -0,0 +1,960 @@+# This file is automatically @generated by Cargo.+# It is not intended for manual editing.+version = 4++[[package]]+name = "arc-swap"+version = "1.9.2"+source = "registry+https://github.com/rust-lang/crates.io-index"+checksum = "c049c0be4daef0b145cb3555416b3b8ef5b7888a38aea1a3a155801fe7b0810b"+dependencies = [+ "rustversion",+]++[[package]]+name = "async-channel"+version = "2.5.0"+source = "registry+https://github.com/rust-lang/crates.io-index"+checksum = "924ed96dd52d1b75e9c1a3e6275715fd320f5f9439fb5a4a11fa51f4221158d2"+dependencies = [+ "concurrent-queue",+ "event-listener-strategy",+ "futures-core",+ 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"registry+https://github.com/rust-lang/crates.io-index"+checksum = "df79d97927682d2fd8adb29682d1140b343be4ac0f08fd68b7765d9c059d3945"+dependencies = [+ "memchr",+]++[[package]]+name = "zmij"+version = "1.0.21"+source = "registry+https://github.com/rust-lang/crates.io-index"+checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"new file mode 100644@@ -0,0 +1,44 @@+[package]+authors = ["The wasm-bindgen Developers"]+edition = "2021"+name = "raytrace-parallel"+publish = false+version = "0.0.0"++[lib]+crate-type = ["cdylib"]++[dependencies]+console_error_panic_hook = "0.1"+futures-channel-preview = "0.3.0-alpha.18"+js-sys = "0.3.103"+serde-wasm-bindgen = "0.6"+wasm-bindgen = "0.2.126"+wasm-bindgen-futures = "0.4.76"++web-sys = { version = "0.3.103", features = [+ "ErrorEvent",+ "Event",+ "Navigator",+ "Window",+ "Worker",+ "DedicatedWorkerGlobalScope",+ "MessageEvent",+ "Element",+ "HtmlElement",+ "NodeList",+ "CustomElementRegistry",+ "ElementDefinitionOptions"+] }++kaja-web = { path = "../.." }+kaja-web-component = { path = "../../../kaja-web-component" }+gloo = { version = "0.12", features = ["futures"] }+kaja-html-macro = "1.0.4"+serde = { version = "1.0.228", features = ["derive"] }+serde_json = "1.0.150"+uuid = { version = "1.23.2", features = ["js", "v4"] }+inventory = "0.3.24"+gloo-timers = { version = "0.4.0", features = ["futures"] }+async-channel = "2"+arc-swap = "1.9.2"new file mode 100644@@ -0,0 +1,201 @@+ Apache License+ Version 2.0, January 2004+ http://www.apache.org/licenses/++TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION++1. Definitions.++ "License" shall mean the terms and conditions for use, reproduction,+ and distribution as defined by Sections 1 through 9 of this document.++ "Licensor" shall mean the copyright owner or entity authorized by+ the copyright owner that is granting the License.++ "Legal Entity" shall mean the union of the acting entity and all+ other entities that control, are controlled by, or are under common+ control with that entity. 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In no event and under no legal theory,+ whether in tort (including negligence), contract, or otherwise,+ unless required by applicable law (such as deliberate and grossly+ negligent acts) or agreed to in writing, shall any Contributor be+ liable to You for damages, including any direct, indirect, special,+ incidental, or consequential damages of any character arising as a+ result of this License or out of the use or inability to use the+ Work (including but not limited to damages for loss of goodwill,+ work stoppage, computer failure or malfunction, or any and all+ other commercial damages or losses), even if such Contributor+ has been advised of the possibility of such damages.++9. Accepting Warranty or Additional Liability. While redistributing+ the Work or Derivative Works thereof, You may choose to offer,+ and charge a fee for, acceptance of support, warranty, indemnity,+ or other liability obligations and/or rights consistent with this+ License. However, in accepting such obligations, You may act only+ on Your own behalf and on Your sole responsibility, not on behalf+ of any other Contributor, and only if You agree to indemnify,+ defend, and hold each Contributor harmless for any liability+ incurred by, or claims asserted against, such Contributor by reason+ of your accepting any such warranty or additional liability.++END OF TERMS AND CONDITIONS++APPENDIX: How to apply the Apache License to your work.++ To apply the Apache License to your work, attach the following+ boilerplate notice, with the fields enclosed by brackets "[]"+ replaced with your own identifying information. (Don't include+ the brackets!) The text should be enclosed in the appropriate+ comment syntax for the file format. We also recommend that a+ file or class name and description of purpose be included on the+ same "printed page" as the copyright notice for easier+ identification within third-party archives.++Copyright [yyyy] [name of copyright owner]++Licensed under the Apache License, Version 2.0 (the "License");+you may not use this file except in compliance with the License.+You may obtain a copy of the License at++ http://www.apache.org/licenses/LICENSE-2.0++Unless required by applicable law or agreed to in writing, software+distributed under the License is distributed on an "AS IS" BASIS,+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.+See the License for the specific language governing permissions and+limitations under the License.new file mode 100644@@ -0,0 +1,20 @@+# Example++Run build.sh to build the example.++This example requires the nightly version of Rust. See rust-toolchain.toml++The more common way to do parallel work in the browser is to use async/await+style code with++```+use wasm_bindgen_futures::spawn_local;++spawn_local(async {+ // your async work here+});+```++See the async example.++The code is based on the raytrace example in the wasm-bindgen crate. License: Apache-2.0. Original author: Alex Crichton et. al.new file mode 100755@@ -0,0 +1,11 @@+#!/bin/sh+set -eu++mkdir -p pkg++CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUSTFLAGS="-Ctarget-feature=+atomics -Clink-args=--shared-memory -Clink-args=--max-memory=1073741824 -Clink-args=--import-memory -Clink-args=--export=__heap_base -Clink-args=--export=__wasm_init_tls -Clink-args=--export=__tls_size -Clink-args=--export=__tls_align -Clink-args=--export=__tls_base" cargo +nightly build -Zbuild-std=std,panic_abort --target wasm32-unknown-unknown+wasm-bindgen target/wasm32-unknown-unknown/debug/raytrace_parallel.wasm --target no-modules --out-dir ./pkg++cp static/index.html ./pkg/+cp static/worker.js ./pkg/+cp static/index.js ./pkg/new file mode 100755@@ -0,0 +1,6 @@+#!/bin/sh+set -eu++./build.sh++python3 server.pynew file mode 100644@@ -0,0 +1,5 @@+[toolchain]+channel = "nightly"+components = ["rust-src"]+profile = "minimal"+targets = ["wasm32-unknown-unknown"]new file mode 100755@@ -0,0 +1,20 @@+#!/usr/bin/env python3+from http.server import HTTPServer, SimpleHTTPRequestHandler, test+from pathlib import Path+import sys++PKG_DIR = Path(__file__).resolve().parent / 'pkg'++class RequestHandler(SimpleHTTPRequestHandler):+ def __init__(self, *args, **kwargs):+ super().__init__(*args, directory=str(PKG_DIR), **kwargs)++ def end_headers(self):+ self.send_header('Cross-Origin-Opener-Policy', 'same-origin')+ self.send_header('Cross-Origin-Embedder-Policy', 'require-corp')+ SimpleHTTPRequestHandler.end_headers(self)++if __name__ == '__main__':+ port=int(sys.argv[1]) if len(sys.argv) > 1 else 8000+ print(f"Serving {PKG_DIR} at http://localhost:{port}/")+ test(RequestHandler, HTTPServer, port=port, bind='127.0.0.1')new file mode 100644@@ -0,0 +1,24 @@+use kaja_web::prelude::*;+use wasm_bindgen::{JsValue, prelude::wasm_bindgen};++macro_rules! console_log {+ ($($t:tt)*) => (crate::log(&format_args!($($t)*).to_string()))+}++#[wasm_bindgen]+extern "C" {+ #[wasm_bindgen(js_namespace = console)]+ pub(crate) fn log(s: &str);+ #[wasm_bindgen(js_namespace = console, js_name = log)]+ pub(crate) fn logv(x: &JsValue);+}++mod main_component;+mod thread;++#[wasm_bindgen(start)]+pub fn init() {+ std::panic::set_hook(Box::new(console_error_panic_hook::hook));+ console_error_panic_hook::set_once();+ init_callbacks();+}new file mode 100644@@ -0,0 +1,109 @@+use arc_swap::ArcSwap;+use kaja_web::prelude::*;+use std::sync::Arc;+use std::sync::RwLock;+use std::time::Duration;++static THREAD_ID: std::sync::atomic::AtomicU32 = std::sync::atomic::AtomicU32::new(0);++struct ThreadComponent {+ id: u32,+ ui: Arc<ArcSwap<Main>>, // read only for foreground+ bg: Arc<RwLock<Main>>, // read/write in background with mutex+}++impl ThreadComponent {+ fn shallow_clone(&self) -> Self {+ Self {+ id: THREAD_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed),+ ui: self.ui.clone(),+ bg: self.bg.clone(),+ }+ }++ fn new(component: Main) -> Self {+ let bg = component.clone();++ Self {+ id: THREAD_ID.fetch_add(1, std::sync::atomic::Ordering::Relaxed),+ ui: Arc::new(ArcSwap::from_pointee(component)),+ bg: Arc::new(RwLock::new(bg)),+ }+ }++ fn lock_component<F>(&self, f: F)+ where+ F: FnOnce(&mut Main),+ {+ let mut bg = self.bg.write().unwrap();+ f(&mut bg);+ self.ui.store(Arc::new((*bg).clone()));+ }+}++fn start_background_threads(id: &str) {+ let handle = Main::get_component(id).expect("Component not found");+ let component = handle.lock().unwrap().clone();++ let thread_component = ThreadComponent::new(component);++ start_background_thread(thread_component.shallow_clone(), id.to_string());+ start_background_thread(thread_component.shallow_clone(), id.to_string());+}++fn start_background_thread(thread_component: ThreadComponent, component_id: String) {+ let _ = crate::thread::spawn(move || {+ loop {+ thread_component.lock_component(|component| {+ component.test = !component.test;+ log!("bg test:", component.test, thread_component.id);+ });++ let ui = thread_component.ui.load();+ log!("ui test:", ui.test, thread_component.id);++ Main::post_ui_thread_update(component_id.as_str());++ let sleep_ms = (js_sys::Math::random() * 1000.0) as u64;+ std::thread::sleep(Duration::from_millis(sleep_ms));+ }+ });+}++#[derive(Clone)]+#[component("main-component")]+struct Main {+ test: bool,+}++impl Component for Main {+ fn connected(id: &str) {+ start_background_threads(&id);+ }++ fn update(id: &str) {+ log!(+ "Update from background thread, running on the UI thread:",+ id+ );++ let Some(handle) = Self::get_component(id) else {+ error!("Main component not found:", id);+ return;+ };++ let Some(element) = get_element_by_id(id) else {+ error!("Element not found:", id);+ return;+ };++ let component = handle.lock().unwrap();+ component.render(&element);+ }+}++impl Main {+ fn render(&self, element: &HtmlElement) {+ element.set_inner_text(&self.test.to_string());+ }+}new file mode 100644@@ -0,0 +1,81 @@+// Silences warnings from the compiler about Work.func and child_entry_point+// being unused when the target is not wasm.+#![cfg_attr(not(target_arch = "wasm32"), allow(dead_code))]++use std::cell::RefCell;+use std::rc::Rc;+use wasm_bindgen::prelude::*;+use web_sys::{DedicatedWorkerGlobalScope, MessageEvent};+use web_sys::{ErrorEvent, Event, Worker};++struct Work {+ func: Box<dyn FnOnce() + Send>,+}++fn spawn_worker() -> Result<Worker, JsValue> {+ let worker = Worker::new("./worker.js")?;++ // When a worker is spun up send it the module and memory so it can start+ // instantiating the Wasm module.++ let array = js_sys::Array::new();+ array.push(&wasm_bindgen::module());+ array.push(&wasm_bindgen::memory());+ worker.post_message(&array)?;++ Ok(worker)+}++/// Spawns a single standalone worker and runs `f` on it.+pub fn spawn(f: impl FnOnce() + Send + 'static) -> Result<(), JsValue> {+ let worker = spawn_worker()?;++ let worker2 = worker.clone();+ let completion_slot = Rc::new(RefCell::new(None));+ let slot2 = completion_slot.clone();++ let completion = Closure::<dyn FnMut(_)>::new(move |event: Event| {+ if let Some(error) = event.dyn_ref::<ErrorEvent>() {+ console_log!("error in standalone worker: {}", error.message());+ } else if event.dyn_ref::<MessageEvent>().is_none() {+ console_log!("unhandled event: {}", event.type_());+ crate::logv(&event);+ }++ worker2.terminate();+ worker2.set_onmessage(None);+ worker2.set_onerror(None);+ *slot2.borrow_mut() = None;+ });++ worker.set_onmessage(Some(completion.as_ref().unchecked_ref()));+ worker.set_onerror(Some(completion.as_ref().unchecked_ref()));+ *completion_slot.borrow_mut() = Some(completion);++ let work = Box::new(Work { func: Box::new(f) });+ let ptr = Box::into_raw(work);++ match worker.post_message(&JsValue::from(ptr as u32)) {+ Ok(()) => Ok(()),+ Err(e) => {+ unsafe {+ drop(Box::from_raw(ptr));+ }+ worker.terminate();+ worker.set_onmessage(None);+ worker.set_onerror(None);+ *completion_slot.borrow_mut() = None;+ Err(e)+ }+ }+}++/// Entry point invoked by `worker.js`+#[wasm_bindgen]+pub fn init_thread_runner(ptr: u32) -> Result<(), JsValue> {+ let ptr = unsafe { Box::from_raw(ptr as *mut Work) };+ let global = js_sys::global().unchecked_into::<DedicatedWorkerGlobalScope>();+ (ptr.func)();+ global.post_message(&JsValue::undefined())?;+ Ok(())+}new file mode 100644@@ -0,0 +1,10 @@+<html>+ <head>+ <title>Wasm Threads</title>+ </head>+ <body>+ Known: <main-component></main-component>+ <script src='raytrace_parallel.js'></script>+ <script src='index.js'></script>+ </body>+</html>new file mode 100644@@ -0,0 +1,28 @@+function loadWasm() {+ if (typeof SharedArrayBuffer !== "function") {+ console.error(+ "this browser does not have SharedArrayBuffer support enabled" ++ "\n\n" ++ msg,+ );+ return;+ }+ // Test for bulk memory operations with passive data segments+ // (module (memory 1) (data passive ""))+ const buf = new Uint8Array([+ 0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x05, 0x03, 0x01, 0x00,+ 0x01, 0x0b, 0x03, 0x01, 0x01, 0x00,+ ]);+ if (!WebAssembly.validate(buf)) {+ console.error(+ "This browser does not support passive Wasm memory, Background threads will not work" ++ "\n\n" ++ msg,+ );+ return;+ }++ wasm_bindgen().catch(console.error);+}++loadWasm();new file mode 100644@@ -0,0 +1,25 @@+// synchronously, using the browser, import out shim JS scripts+importScripts("raytrace_parallel.js");++// Wait for the main thread to send us the shared module/memory. Once we've got+// it, initialize it all with the `wasm_bindgen` global we imported via+// `importScripts`.+//+// After our first message all subsequent messages are an entry point to run,+// so we just do that.+self.onmessage = (event) => {+ let initialised = wasm_bindgen(...event.data).catch((err) => {+ // Propagate to main `onerror`:+ setTimeout(() => {+ throw err;+ });+ // Rethrow to keep promise rejected and prevent execution of further commands:+ throw err;+ });++ self.onmessage = async (event) => {+ // This will queue further commands up until the module is fully initialised:+ await initialised;+ wasm_bindgen.init_thread_runner(event.data);+ };+};