I understand the first part, but the second? Why is the finalizer function passed a reference to the object being finalized then?
-----Original Message----- >From: Ian Lance Taylor <i...@golang.org> >Sent: Aug 21, 2019 12:06 PM >To: Robert Engels <reng...@ix.netcom.com> >Cc: zct <tangzhongch...@bytedance.com>, golang-nuts ><golang-nuts@googlegroups.com> >Subject: Re: [go-nuts] A problem about runtime.SetFinalizer > >On Wed, Aug 21, 2019 at 9:14 AM Robert Engels <reng...@ix.netcom.com> wrote: >> >> Seems like GoLint should emit an 'unused parameter' in this case. > >It's normal for a function to have an unused parameter. And in >particular it's normal for a finalizer to not refer to the object >being finalized. > >Ian > > >> -----Original Message----- >> From: zct >> Sent: Aug 21, 2019 10:50 AM >> To: golang-nuts >> Subject: Re: [go-nuts] A problem about runtime.SetFinalizer >> >> I got it.Thank you for your help >> >> 在 2019年8月21日星期三 UTC+8下午11:00:26，Ian Lance Taylor写道： >>> >>> On Wed, Aug 21, 2019 at 5:55 AM zct <tangzho...@bytedance.com> wrote: >>> > >>> > I recently had a goroutine leak problem, the code i reduced is like >>> > this: https://play.golang.org/p/YW4hWoZZ7CD. >>> > >>> > The program is long-running and the finalizer is not called >>> > >>> > The RoomObj is deleted from map， why was it not released？ Is it refereed >>> > by the asyncChan object？ >>> > >>> > I don't understand here, can somebody explain the reason >>> >>> Your finalizer itself is keeping the value alive. >>> >>> runtime.SetFinalizer(a, func(r *RoomTest) { >>> fmt.Println("SetFinalizer") >>> close(a.asyncChan.a) >>> }) >>> >>> You need to write the finalizer function to refer to r, not a. The >>> reference to a in the finalizer function ensures that a is always >>> live. >>> >>> Ian >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/906c3d64-9211-4206-a2ee-1a0d881a35b7%40googlegroups.com. >> >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/821137931.4341.1566404048080%40wamui-kitty.atl.sa.earthlink.net. > >-- >You received this message because you are subscribed to the Google Groups >"golang-nuts" group. >To unsubscribe from this group and stop receiving emails from it, send an >email to golang-nuts+unsubscr...@googlegroups.com. >To view this discussion on the web visit >https://groups.google.com/d/msgid/golang-nuts/CAOyqgcUjmy8%2BMPageq73sjWOR792mkXtLbGtwg6jfB_76R2R1Q%40mail.gmail.com. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/2086058808.5386.1566407889031%40wamui-kitty.atl.sa.earthlink.net.
