Ah, ok. I also just realized (necessity being the mother of and all that) that I can probably be storing these on the scheme side too, as the actual function object is stored there anyway in a hash-table.
Related: in Max they recommend using sysmem_newptr instead of malloc, is there a recommended cross-platform Pd replacement for malloc I should be using? thanks! iain On Sun, Jun 6, 2021 at 6:52 PM Miller Puckette <[email protected]> wrote: > Well, Pd's own scheduler for clocks keeps them in a linked list and chases > down it to set and unset them. So if you did anything smart for the > scheme callbacks Pd would see to it that it's still linear time in the > number of active callbacks. > > cheers > M > > On Sun, Jun 06, 2021 at 06:22:41PM -0700, Iain Duncan wrote: > > Thanks Miller. That brings up one more question.. ;-) > > > > In Scheme for Max, the way I do it is I keep a hash-table in C going > > with keys that are created on Scheme delay calls, so that one can cancel > > clocks by fetching them from the hashtable. In Max, there's a > > cross-platform hash-table implementation that I'm using. Is there > something > > similar for Pd, or if not, is there an approach you would recommend for > > keeping a key-value store in C for the clocks by a symbolic key? I guess > a > > good question might be if this is even necessary, given there can't be > > *that* many clocks scheduled for the future. And association list type > > thing might do just as well. > > > > thanks for the help, it's going well, now that I can finally work on it! > > ought to have a first alpha folks can play with in the next couple of > weeks. > > iain > > > > > > > > On Sun, Jun 6, 2021 at 5:36 PM Miller Puckette <[email protected]> wrote: > > > > > clock() is the only mechanism - for repeats, the easiest thing is often > > > to just re-use a clock() and re-set it each time it goes off (as in > > > the metro obejct). You can indeed create clock obejcts on the fly - > > > that's what pipe does. But you'll want to keep track of them so you > can > > > cancel them if the owning object goes away. > > > > > > cheers > > > M > > > > > > On Sun, Jun 06, 2021 at 05:16:09PM -0700, Iain Duncan wrote: > > > > Ah fantastic, thanks. I was looking in pipe and not seeing it, but > was > > > > probably just lost in other new details and not seeing the forest > for the > > > > trees. :-) > > > > > > > > Couple of follow ups: > > > > - is there a separate facility for making a repeated callback (ie not > > > > one-shot), or does one just do both with clock? > > > > - is it safe to make clocks as we need them (ie during a method > call, not > > > > necessarily at object instantiation time), or is this the kind of > thing > > > > where for real time use one needs to make a clock pool and a pool > manager > > > > and all that? > > > > > > > > thanks! > > > > iain > > > > > > > > On Sun, Jun 6, 2021 at 5:12 PM Miller Puckette <[email protected]> wrote: > > > > > > > > > Yep, clock_delay() . Simples example is in Pd's "delay" object, > > > x_time.c > > > > > > > > > > cheers > > > > > Miller > > > > > > > > > > On Sun, Jun 06, 2021 at 04:21:46PM -0700, Iain Duncan wrote: > > > > > > Hi folks, I'm hoping someone can point me in the right direction > > > here. > > > > > I'm > > > > > > porting Scheme for Max to pure data and I'm stuck figuring out > how > > > to get > > > > > > delayed functions going. In Max, the SDK has a facility to make > > > register > > > > > a > > > > > > callback to executed at some point in the future, a few different > > > ways. > > > > > Is > > > > > > there a Pd equivalent, and if so, could anyone point me at > resources > > > or > > > > > > code for it? I basically just need to be able to have a callback > > > fire > > > > > off > > > > > > at the right time with one argument, which can be void pointer > to the > > > > > rest > > > > > > of the stuff i want to get. > > > > > > > > > > > > thanks! > > > > > > iain > > > > > > > > > > > _______________________________________________ > > > > > > Pd-dev mailing list > > > > > > [email protected] > > > > > > > > > > > > > > > https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.puredata.info_listinfo_pd-2Ddev&d=DwICAg&c=-35OiAkTchMrZOngvJPOeA&r=XprZV3Fxus2L1LCw80hE4Q&m=uekrR-wLMB9CDNku0beRkRmoSJoExinRbBSlb0UQknQ&s=98jkGlO1FFE0Ea5fhSopCbZt6bmZH580Y0IUfgX4Rwk&e= > > > > > > > > > > > > > > > -- > > > > > > > > > > > -- > > > > > -- >
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