On Thu, Apr 27, 2017, 05:03 Géza Búza <bgh...@gmail.com> wrote: > Hi Philip, > > Thanks for the quick response. > > So it's single threaded, what a pity. The long running operation is IO and > I already refactored my code to use async functions of GIO. I used > *Promise* objects to handle the IO operations from JavaScript. The > problem is that I need to wait for all IO calls to be completed before I > can process the output and I done it with *Promise.all()* which waits for > all Promises to be fulfilled. But that makes the code synchronous again. I > could chain the IO calls, but that would require more refactoring. > > Regards, > Geza >
Hi Geza, Promise.all should not make the code synchronous. I wonder if you are maybe using the synchronous Gio APIs inside your Promise wrapping code. Check wrapPromise() in the top half of [1] for an example. Regards, Philip C [1] https://gist.github.com/ptomato/4973bb71c153c9109774b2392e8d22c3 > > <philip.chime...@gmail.com> ezt írta (időpont: 2017. ápr. 27., Cs, 2:41): > >> >> >> On Wed, Apr 26, 2017, 15:08 Géza Búza <bgh...@gmail.com> wrote: >> >>> Hi everybody, >>> >>> I run into an issue while developing an extension for Gnome Shell. >>> Long running Javascript code can make the whole Gnome Shell unresponsive >>> for a second. Since I cannot reduce the execution time of the long running >>> code, I want to move it out of the main loop's thread to a new one to make >>> the UI update independent. I found that the best way would be to create a >>> GTask <https://developer.gnome.org/gio/unstable/GTask.html> to run my >>> synchronous JS code asynchronously. >>> >> Hi Geza, >> >> GJS is single-threaded; you can't run JS code from a separate thread. GTask, >> as you have noticed, is not usable from GJS and this is one of the reasons >> why. >> >> However, if your long-running operation is I/O, then you can simply use >> Gio's asynchronous operations and not worry about blocking the UI. >> Effectively Gio will decide whether to run the C code in a thread or not. >> >> If it is a long-running calculation or something like that, then you will >> have to iterate the main loop yourself often enough during the calculation >> so that the UI doesn't block. >> >> Regards, >> Philip C >> >>> -- > Üdvözlettel, > Búza Géza >
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