I can understand using Javascript generators, but how would c++ lambdas help? On Mar 16, 2014 3:47 PM, "Alon Zakai" <[email protected]> wrote:
> Currently not. It would require a very different code generation approach > than we currently have. > > In theory something similar could be done using generators, in very recent > versions of firefox and chrome. But even with the help of generators, this > is not easy to do, and it is not clear how it would affect performance - > likely very adversely. > > One similar thing you can do is manage your own code using c++11 lambdas. > You could write a little system that continues to run the current function > once a callback triggers that. > > - Alon > > > > On Sun, Mar 16, 2014 at 1:43 AM, Joel Croteau <[email protected]> wrote: > >> I would like to have a function that makes an async call, and returns >> control to the browser during the call, then resumes once the async call is >> complete. However, I would like this to appear to the calling code to be a >> synchronous call. So for instance, I could do something like this: >> >> struct FileInfo >> { >> void* buffer; >> unsigned size; >> }; >> >> FileInfo loadUrl(const char* url) >> { >> FileInfo info; >> emscripten_async_wget2_data(url, "GET", "", &info, false, onload, >> onerror, onprogress); >> emscripten_pause(); // Blocks until emscripten_resume() is called >> return info; >> } >> >> void onerror(void* ptr, int code, const char* desc) >> { >> // Handle not found, etc. >> } >> >> void onprogress(void* ptr, int loaded, int total) >> { >> // Update progress bar >> } >> >> void onload(void* ptr, void* buffer, unsigned size) >> { >> static_cast<FileInfo*>(ptr)->buffer = buffer; >> static_cast<FileInfo*>(ptr)->size = size; >> >> emscripten_resume(); // Now loadUrl resumes and returns FileInfo. >> } >> >> Is there any way to do this? >> >> -- >> 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]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > You received this message because you are subscribed to a topic in the > Google Groups "emscripten-discuss" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/emscripten-discuss/Op5ifeMjauA/unsubscribe > . > To unsubscribe from this group and all its topics, send an email to > [email protected]. > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
