Could JavaScript have synchronous await?(2ality.com)

4 pointsby Kerrickปีที่แล้ว1 comments

Could JavaScript have synchronous await?

https://2ality.com/2025/03/sync-await.html

1 comments

starmoleปีที่แล้ว

You can emulate synchronous await by using a worker thread, marshal your async operation to the main thread, then in the worker use Atomics.wait() to blocking wait on a SharedArrayBuffer variable. Once the async operation completes on main, write back the result to the SharedArrayBuffer and wake up the waiting variable. I believe that's also what emscripten uses to emulate synchronous posix calls.