HEAP8 is one of the global variables the emscripten JS always has. It's always present for code in a JS library, --pre-js, or other code that is part of the main JS output (that is all optimized together).
On Wed, Jul 8, 2020 at 6:39 PM キャロウ マーク <[email protected]> wrote: > Thanks Alon. > > > On Jul 8, 2020, at 15:59, Alon Zakai <[email protected]> wrote: > > > > Embind and the WebIDL binder are separate tools. They don't have any > special support for mixing between them. > > That’s what I had concluded. Thanks for confirming. My confusion arose > because it is not clear (to me at least) that emscripten::val is strictly > part of embind. > > > > > The WebIDL binder doesn't have direct support for copying data from JS > into wasm. You can do it manually though, without the WebIDL binder, by > malloc()ing some room, copying the data (all in JS, just a copy from the JS > data into HEAP8 for example), then you can pass the malloc()ed pointer as a > parameter to the compiled code (with the WebIDL binder, passing it as a > void* would work, or an int). > > So in JS do I create a typed array view on the right place in HEAP8 and > then copy in and out of that? How does the JS find HEAP8? I need to create > a wrapper for the zstd decoder so I need to be as efficient as possible in > moving the data. > > Regards > > -Mark > > > -- > 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/emscripten-discuss/1ECB6FF7-0049-4F3B-93AB-0CDD0879A908%40callow.im > . > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/CAEX4NpQW%3DuafqKph1dJ7S%3DiNAp3rCDY%2B_9T8oeDh0kRtk6r%3Djg%40mail.gmail.com.
