Note that uv_async_init is not thread-safe. You should initialize it from the loop thread. Only uv_async_send is thread-safe.

Ahhh interesting. That probably should be a note for that method. I'll fix that in this PR. Thanks for the heads up @saghul!

@saghul I put uv_async_init on the main loop thread but that seems to kill it in linux/osx.

I opened a new PR to show that. Note that Windows succeeds but linux and osx are throwing false positives on the tests.

@tjfontaine was saying that we should be doing something like this.

I think I'm going to merge this for right now and tackle that later.