The read-write operations I'm protecting will have coroutines inside that need to be awaited on, so I don't think I'll be able to take advantage to that extreme.
But I think I might be able to use your point to simplify the logic a little. (To rephrase, you're reminding me that context switches can't happen at arbitrary lines of code. I only need to be prepared for the cases where there's an await / yield from.) --Chris On Sun, Jun 25, 2017 at 2:30 PM, Guido van Rossum <gvanros...@gmail.com> wrote: > The secret is that as long as you don't yield no other task will run so you > don't need locks at all. > > On Jun 25, 2017 2:24 PM, "Chris Jerdonek" <chris.jerdo...@gmail.com> wrote: >> >> Thank you. I had seen that, but it seems heavier weight than needed. >> And it also requires locking on reading. >> >> --Chris >> >> On Sun, Jun 25, 2017 at 2:16 PM, Andrew Svetlov >> <andrew.svet...@gmail.com> wrote: >> > There is https://github.com/aio-libs/aiorwlock >> > >> > On Mon, Jun 26, 2017 at 12:13 AM Chris Jerdonek >> > <chris.jerdo...@gmail.com> >> > wrote: >> >> >> >> I'm relatively new to async programming in Python and am thinking >> >> through possibilities for doing "read-write" synchronization. >> >> >> >> I'm using asyncio, and the synchronization primitives that asyncio >> >> exposes are relatively simple [1]. Have options for async read-write >> >> synchronization already been discussed in any detail? >> >> >> >> I'm interested in designs where "readers" don't need to acquire a lock >> >> -- only writers. It seems like one way to deal with the main race >> >> condition I see that comes up would be to use loop.time(). Does that >> >> ring a bell, or might there be a much simpler way? >> >> >> >> Thanks, >> >> --Chris >> >> >> >> >> >> [1] https://docs.python.org/3/library/asyncio-sync.html >> >> _______________________________________________ >> >> Async-sig mailing list >> >> Async-sig@python.org >> >> https://mail.python.org/mailman/listinfo/async-sig >> >> Code of Conduct: https://www.python.org/psf/codeofconduct/ >> > >> > -- >> > Thanks, >> > Andrew Svetlov >> _______________________________________________ >> Async-sig mailing list >> Async-sig@python.org >> https://mail.python.org/mailman/listinfo/async-sig >> Code of Conduct: https://www.python.org/psf/codeofconduct/ _______________________________________________ Async-sig mailing list Async-sig@python.org https://mail.python.org/mailman/listinfo/async-sig Code of Conduct: https://www.python.org/psf/codeofconduct/
