workers: basic event loop (#3828)

* establish basic event loop for workers
* make "self.close()" inside worker
* remove "runWorkerMessageLoop() - instead manually call global function 
  in Rust when message arrives. This is done in preparation for structured clone
* refactor "WorkerChannel" and use distinct structs for internal 
  and external channels;  "WorkerChannelsInternal" and "WorkerHandle"
* move "State.worker_channels_internal" to "Worker.internal_channels"
* add "WorkerEvent" enum for child->host communication; 
  currently "Message(Buf)" and  "Error(ErrBox)" variants are supported
* add tests for nested workers
* add tests for worker throwing error on startup

1 files changed, 1 insertions, 6 deletions

diff --git a/cli/js/compiler.ts b/cli/js/compiler.ts
index bf0287efe..4ca2887c6 100644
--- a/cli/js/compiler.ts
+++ b/cli/js/compiler.ts
@@ -40,10 +40,7 @@ import { Diagnostic } from "./diagnostics.ts";
 import { fromTypeScriptDiagnostic } from "./diagnostics_util.ts";
 import { assert } from "./util.ts";
 import * as util from "./util.ts";
-import {
-  bootstrapWorkerRuntime,
-  runWorkerMessageLoop
-} from "./runtime_worker.ts";
+import { bootstrapWorkerRuntime } from "./runtime_worker.ts";
 
 interface CompilerRequestCompile {
   type: CompilerRequestType.Compile;
@@ -340,13 +337,11 @@ async function wasmCompilerOnMessage({
 function bootstrapTsCompilerRuntime(): void {
   bootstrapWorkerRuntime("TS");
   globalThis.onmessage = tsCompilerOnMessage;
-  runWorkerMessageLoop();
 }
 
 function bootstrapWasmCompilerRuntime(): void {
   bootstrapWorkerRuntime("WASM");
   globalThis.onmessage = wasmCompilerOnMessage;
-  runWorkerMessageLoop();
 }
 
 Object.defineProperties(globalThis, {