Haven't tried out Edge at all with asm.js SharedArrayBuffer yet. I wonder if it fails in smaller test cases already of this pattern?
2017-03-10 5:37 GMT+02:00 Brion Vibber <br...@pobox.com>: > Whoops, forgot my sample URL to reproduce: > > https://brionv.com/misc/ogv.js/demo-mt/#file=Knowledge_ > for_Everyone_(short_cut).webm&player=js-mt&size=480p.vp9. > webm&source=shortlist-vp9 > > (Only the VP9 decoder has the multithread mode and I'm seeing good > results, though it currently blocks the main thread during decoding I can > easily fix that. And it's a little... hang-y sometimes, possibly due to not > waiting on thread creation if the thread pool fills up.) > > -- brion > > On Thu, Mar 9, 2017 at 7:29 PM, Brion Vibber <br...@pobox.com> wrote: > >> Is Edge known to be working (or broken) with emscripten's pthreads mode? >> >> I've got libvpx running multithreaded in ogv.js on Safari Tech Preview >> and Firefox Dev Edition, but am having some trouble with Edge in the >> current Windows Insider build (15048). (Have to enable 'Experimental JS >> features' in about:flags to get Atomics and SharedArrayBuffer.) >> >> It's throwing an error "SCRIPT5664: The operation is not supported on >> this typed array type" in the initMainThreadBlock function from >> library_pthread.js, on this line: >> >> Atomics.store(HEAPU32, (PThread.mainThreadBlock + {{{ >> C_STRUCTS.pthread.tsd }}} ) >> 2, tlsMemory); // Init thread-local-storage >> memory array. >> >> As far as I can tell it should be working; HEAPU32 is a Uint32Array, its >> buffer is a SharedArrayBuffer instance, and the memory locations seem in >> line with what's expected. >> >> The Atomics implementation in Edge's JS engine is at >> https://github.com/Microsoft/ChakraCore/blob/master/lib/Runt >> ime/Library/AtomicsObject.cpp and I don't see anything obviously >> surprising in the source, though it could conceivably be out of sync. Nor >> do I encounter the error if I just instantiate a SharedArrayBuffer and a >> Uint32Array and call Atomics.store on it. >> >> It's possible I've broken something in my modularization fixes that >> doesn't break in the other browsers... >> >> Thanks! >> >> -- brion >> > > -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to emscripten-discuss+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to emscripten-discuss+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
