pthread sigmask/atfork no-op when using NNG

[aliasdevelopment]

I am trying to port an existing application which is using nng.

At runtime I get no-op errors relating to sigmask and atfork

Is it technically possible to support pthread_sigmask and pthread_atfork in emscripten?

[aliasdevelopment]

I found "The Emscripten implementation does also not support multiprocessing via fork() and join()." on https://emscripten.org/docs/porting/pthreads.html.

Is this statement valid as a 'not support yet' statement or a 'is not possible' statement?

[aliasdevelopment]

Both #7670 and #7672 are hinting changes allowing full posix sockets and multithreading aware websockets

[aliasdevelopment]

The initial issue has been seen on emscripten branch master and incoming.

Tried juj:full_posix_sockets branch described in #7672 and is still getting the no-op

Using: -lwebsocket.js -s PROXY_POSIX_SOCKETS=1 -s USE_PTHREADS=1 -s PROXY_TO_PTHREAD=1
Using: firefox setting javascript.options.shared_memory = true

Firefox 65.0.1 and Firefox Nightly 68.0a1 (2019-05-03) produce the following when using emscripten juj:full_posix_sockets:

Preallocating 1 workers for a pthread spawn pool. app_one.html:1237:13
Network - Starting app_one.html:1237:13
Network - Call resolve app_one.html:1237:13
Network - Resolve start: ws://127.0.0.1:9999 app_one.html:1237:13
Preallocating 1 workers for a pthread spawn pool. app_one.html:1237:13
fork() is not supported: pthread_atfork is a no-op. app_one.js:9328:7
Preallocating 1 workers for a pthread spawn pool. app_one.html:1237:13
pthread_sigmask() is not supported: this is a no-op. app_one.js:9611:7
Preallocating 1 workers for a pthread spawn pool. app_one.html:1237:13
pthread_sigmask() is not supported: this is a no-op. app_one.js:9611:7
Preallocating 1 workers for a pthread spawn pool. app_one.html:1237:13
pthread_sigmask() is not supported: this is a no-op.
ReferenceError: WS is not defined

[femski]

I have installed and activated latest 1.39.8 build (also tried "master" build) and I still see:

fork() is not supported: pthread_atfork is a no-op

Also, pthread_sigmask throws exception.

I am trying to use libuv (posix only) to work under emscripten

Issue #7672 and Issue #7670 are both supposed to have been merged to "incoming" which I thought was now "master". Any idea when we can use pthread_sigmast/pthread_atfork in emscripten ?

cc: @juj

[stale]

This issue has been automatically marked as stale because there has been no activity in the past year. It will be closed automatically if no further activity occurs in the next 30 days. Feel free to re-open at any time if this issue is still relevant.