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
This commit is contained in:
Bartek Iwańczuk 2020-02-11 10:04:59 +01:00 committed by GitHub
parent 81905a867e
commit 79b3bc05d6
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26 changed files with 779 additions and 517 deletions

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@ -118,7 +118,6 @@ declare global {
var bootstrapWorkerRuntime:
| ((name: string) => Promise<void> | void)
| undefined;
var runWorkerMessageLoop: (() => Promise<void> | void) | undefined;
var onerror:
| ((
msg: string,