feat: support SharedArrayBuffer sharing between workers (#11040)

This commit adds support for sharing SABs between workers.

cli/main.rs

@@ -123,6 +123,9 @@ fn create_web_worker_callback(
       get_error_class_fn: Some(&crate::errors::get_error_class_name),
       blob_store: program_state.blob_store.clone(),
       broadcast_channel: program_state.broadcast_channel.clone(),
+      shared_array_buffer_store: Some(
+        program_state.shared_array_buffer_store.clone(),
+      ),
     };
 
     let (mut worker, external_handle) = WebWorker::from_options(
@@ -209,6 +212,9 @@ pub fn create_main_worker(
     }),
     blob_store: program_state.blob_store.clone(),
     broadcast_channel: program_state.broadcast_channel.clone(),
+    shared_array_buffer_store: Some(
+      program_state.shared_array_buffer_store.clone(),
+    ),
   };
 
   let mut worker = MainWorker::from_options(main_module, permissions, &options);

cli/program_state.rs

@@ -15,6 +15,7 @@ use crate::module_graph::TypeLib;
 use crate::source_maps::SourceMapGetter;
 use crate::specifier_handler::FetchHandler;
 use crate::version;
+use deno_core::SharedArrayBufferStore;
 use deno_runtime::deno_broadcast_channel::InMemoryBroadcastChannel;
 use deno_runtime::deno_web::BlobStore;
 use deno_runtime::inspector_server::InspectorServer;
@@ -55,6 +56,7 @@ pub struct ProgramState {
   pub ca_data: Option<Vec<u8>>,
   pub blob_store: BlobStore,
   pub broadcast_channel: InMemoryBroadcastChannel,
+  pub shared_array_buffer_store: SharedArrayBufferStore,
 }
 
 impl ProgramState {
@@ -81,6 +83,7 @@ impl ProgramState {
 
     let blob_store = BlobStore::default();
     let broadcast_channel = InMemoryBroadcastChannel::default();
+    let shared_array_buffer_store = SharedArrayBufferStore::default();
 
     let file_fetcher = FileFetcher::new(
       http_cache,
@@ -148,6 +151,7 @@ impl ProgramState {
       ca_data,
       blob_store,
       broadcast_channel,
+      shared_array_buffer_store,
     };
     Ok(Arc::new(program_state))
   }

cli/standalone.rs

@@ -248,6 +248,7 @@ pub async fn run(
     origin_storage_dir: None,
     blob_store,
     broadcast_channel,
+    shared_array_buffer_store: None,
   };
   let mut worker =
     MainWorker::from_options(main_module.clone(), permissions, &options);

cli/tests/workers/shared_array_buffer.ts

@@ -0,0 +1,9 @@
+self.postMessage("ready");
+
+globalThis.addEventListener("message", (e) => {
+  const bytes1 = new Uint8Array(e.data[0]);
+  const bytes2 = new Uint8Array(e.data[1]);
+  bytes1[0] = 1;
+  bytes2[0] = 2;
+  self.postMessage("done");
+});

cli/tests/workers/test.ts

@@ -789,6 +789,34 @@ Deno.test({
   },
 });
 
+Deno.test({
+  name: "worker SharedArrayBuffer",
+  fn: async function (): Promise<void> {
+    const promise = deferred();
+    const workerOptions: WorkerOptions = { type: "module" };
+    const w = new Worker(
+      new URL("shared_array_buffer.ts", import.meta.url).href,
+      workerOptions,
+    );
+    const sab1 = new SharedArrayBuffer(1);
+    const sab2 = new SharedArrayBuffer(1);
+    const bytes1 = new Uint8Array(sab1);
+    const bytes2 = new Uint8Array(sab2);
+    assertEquals(bytes1[0], 0);
+    assertEquals(bytes2[0], 0);
+    w.onmessage = (): void => {
+      w.postMessage([sab1, sab2]);
+      w.onmessage = (): void => {
+        assertEquals(bytes1[0], 1);
+        assertEquals(bytes2[0], 2);
+        promise.resolve();
+      };
+    };
+    await promise;
+    w.terminate();
+  },
+});
+
 Deno.test({
   name: "Send MessagePorts from / to workers",
   fn: async function (): Promise<void> {