On Wed, Feb 10, 2021 at 3:53 AM Kalle Huttunen <[email protected]> wrote:
> What about worker threads? If `emscripten_set_timeout` is called in a > thread other than main, the thread might be blocking somewhere when the > timer triggers, no? It might also be that I'm misunderstanding some > fundamental concept here... :) > > In that case the JS timer will never fire. All events (including timers) require you to return to the event loop before they fire. Actually blocking also blocks all events. -- > Kalle > > On Wed, 10 Feb 2021 at 04:50, 'Sam Clegg' via emscripten-discuss < > [email protected]> wrote: > >> >> >> On Tue, Feb 9, 2021 at 6:50 AM Kalle Huttunen <[email protected]> wrote: >> >>> Came back to this after a while, and it seems that >>> using `emscripten_set_interval` and `emscripten_set_timeout` would not be a >>> good option for a general solution after all, as they will try to invoke >>> the callback in the calling thread, and there's no guarantees what the >>> calling thread will be doing when the timer triggers. So it seems to me >>> that some kind of timer specific thread would be needed. >>> >>> >> JavaScript is single threaded, and handlers have to run to completion >> before another even can fire. So when timers fire there is, by defintion, >> nothing else going on the calling thread. The exception to this is >> ASYNCIFY which can make it appear that events occur mid-function. If you >> are not using ASYNCIFY you don't need to worry about that. >> >> >>> -- >>> Kalle >>> >>> On Tue, 1 Sept 2020 at 10:21, Kalle Huttunen <[email protected]> wrote: >>> >>>> Ok, thanks for the answer. I started experimenting implementing the >>>> timers in my code with `emscripten_set_interval` and >>>> `emscripten_set_timeout` in the web build. Do you think this could be the >>>> approach also for implementing them in library_syscalls.js? >>>> >>>> -- >>>> Kalle >>>> >>>> On Thursday, 27 August 2020 at 22:26:32 UTC+3 [email protected] wrote: >>>> >>>>> It looks like we do not support that today. `timer_create.c` is >>>>> excluded from the musl build in system_libs.py. >>>>> >>>>> If you'd like to add it that would be most welcome. It looks like >>>>> you'd need to enable that `.c` file and then implement the time_create >>>>> syscall in library_syscalls.js. >>>>> >>>>> cheers, >>>>> sam >>>>> >>>>> On Thu, Aug 27, 2020 at 10:45 AM Kalle Huttunen <[email protected]> >>>>> wrote: >>>>> >>>>>> Does Emscripten support POSIX timers? My code using them compiles, >>>>>> but fails to link with undefined references to timer_create() and >>>>>> friends. >>>>>> I'm wondering am I missing some linker flag etc or are they just not >>>>>> supported. >>>>>> >>>>>> -- >>>>>> Kalle >>>>>> >>>>>> -- >>>>>> 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/b6b76dd4-90ea-453a-ae4a-56355075d061n%40googlegroups.com >>>>>> <https://groups.google.com/d/msgid/emscripten-discuss/b6b76dd4-90ea-453a-ae4a-56355075d061n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>> . >>>>>> >>>>> -- >>>> 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/RDb4CfuoSpA/unsubscribe >>>> . >>>> To unsubscribe from this group and all its topics, send an email to >>>> [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/emscripten-discuss/fa5a792f-b10c-4477-9572-8f8f3ab72c4en%40googlegroups.com >>>> <https://groups.google.com/d/msgid/emscripten-discuss/fa5a792f-b10c-4477-9572-8f8f3ab72c4en%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >>> 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/CACrvwwt3aC7i%2Bm-cPXB8tSgusB2Nt_3-nr3H2c%3DU0YaZnjVQRA%40mail.gmail.com >>> <https://groups.google.com/d/msgid/emscripten-discuss/CACrvwwt3aC7i%2Bm-cPXB8tSgusB2Nt_3-nr3H2c%3DU0YaZnjVQRA%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> 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/RDb4CfuoSpA/unsubscribe >> . >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/emscripten-discuss/CAL_va288_z-gkAip5h7mkou0oCczfi5BuQ581WR3hBQJv_CBjg%40mail.gmail.com >> <https://groups.google.com/d/msgid/emscripten-discuss/CAL_va288_z-gkAip5h7mkou0oCczfi5BuQ581WR3hBQJv_CBjg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > 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/CACrvwwvG1i39cn6eTYOSvBY-Q4Nu9aa_qNCzJxj0Kn85s%2BOFdw%40mail.gmail.com > <https://groups.google.com/d/msgid/emscripten-discuss/CACrvwwvG1i39cn6eTYOSvBY-Q4Nu9aa_qNCzJxj0Kn85s%2BOFdw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. 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