emscripten-core/emscripten

Make use of Asyncify for pthread_join

Open

#9,910 opened on Nov 27, 2019

View on GitHub
 (25 comments) (1 reaction) (0 assignees)C++ (3,519 forks)batch import
asyncifygood first bughelp wantedmultithreading

Repository metrics

Stars
 (27,361 stars)
PR merge metrics
 (Avg merge 19d 10h) (147 merged PRs in 30d)

Description

[Forked from discussion in #9579]

Rather than disallowing blocking on the main thread and giving an escape hatch in form of a setting that still allows it, we could transform pthread_join and friends via Asyncify instead and use Atomics.waitAsync under the hood.

This way the main browser thread wouldn't really be blocked, but the code would be still backwards-compatible and properly wait for thread to finish execution as user expects.

Contributor guide

Research direction
Investigate how to integrate Asyncify to transform pthread join and related functions, and explore the use of Atomics.waitAsync to enable asynchronous blocking on the main thread.
Tech stack
ccpp
Domain
toolingbackend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
WebAssemblyC/C++pthreadsAsyncify
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25