[DRAFT] Experimental shared memory support

[nidin]

Introduction

Worker based multi threading and shard memory already available in chrome canary. I managed to test it with minimal changes in binaryen and assembly script. We could add an experimental support to assembly script by allowing user to define main memory as shared and share memory between workers.

Requirements

• Atomic shared memory allocator (stack details must be saved in shared memory itself).
• Compiler option to enable and accept imported memory as shared memory.

[dcodeIO]

Sounds good! Could just be compiler flag --sharedMemory for now that tells asc to make the main memory shared. Once we have that, we can take a look at allocators. Might be useful to have atomic ops for locking and/or a distinction between a global and a thread-local allocator.

[nidin]

I will work on it. Need to check if binaryen already have atomic operations support. If not it need to be added first in binaryen.

[MaxGraey]

@nidin Can confirm, binaryen support atomics and binaryen.js api.

[nidin]

@MaxGraey Perfect. I am on it.

[dcodeIO]

Closing in favor of the related PRs :)