The upcoming solution for this type of problem is the SharedArrayBuffer
specification, which allows Web Workers to share data and pointers
directly. Though emscripten_call_worker() is not designed to work with
SharedArrayBuffer. You can try creating multiple threads with the -s
USE_PTHREADS=1 build mode, and run in a browser that supports
SharedArrayBuffer, and then use the pthreads API to create multiple threads
that can access pointers to classes like native multithreading does.
perjantai 11. elokuuta 2017 Alon Zakai <alonza...@gmail.com> kirjoitti:
> Yes, objects like that won't automatically work properly with
> emscripten_call_worker. That method just receives a pointer and a size, and
> it copies those bytes. In this case, the std::vector (and maybe string)
> refer to bytes allocated on the heap, and not inside the object itself. So
> you'd need to make sure those are copied as well.
>
> On Fri, Aug 11, 2017 at 12:29 AM, <ilia.galas...@gmail.com
> <javascript:_e(%7B%7D,'cvml','ilia.galas...@gmail.com');>> wrote:
>
>> Hi,
>> I am practicing to call webworker inside C++ with
>> emscripten_call_worker() and I want to pass complext object, lile
>> class Object
>> {
>> std::vector<char> bytes;
>> std::string name;
>> cv::Mat image;
>> }:
>>
>> Before passing I use memcpy to copy memory to char and pass it, but it
>> looks like web worker loose some parts of bytes. When I try to get access
>> to them in workers. Maybe I should add some flags, or I just cannot pass
>> complex objects to worker?
>>
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