You original example has a problem that others have pointed out because it's possible for one goroutine to step on the part of the backing array used by others. In principle though your technique looks OK to me as long as you prevent that happening, for example by using the three-value slice operator to set the capacity as well as the length of the bucket items.
https://play.golang.org/p/vzQlULC1zs7 It's OK to read and write items of the same underlying array as long as any given element of the array is only accessed by a single goroutine (or appropriate synchronisation is used). On 23 April 2018 at 10:38, Kaveh Shahbazian <kaveh.shahbaz...@gmail.com> wrote: > Also -race does not complain about this: > https://play.golang.org/p/IeA4npcemf5 > > > On Monday, April 23, 2018 at 10:51:05 AM UTC+4:30, Kaveh Shahbazian wrote: >> >> @Silviu The code is mutating same item from two goroutines. While the >> original target is to create a buffer pool that their items is not being >> mutated from two goroutines - actually they can not do that because at a >> specific time only one goroutine has access to one buffer. >> >> @Tamas Regarding "If there's no uncoordinated write and read/write of the >> same slot, then it's race-free", is it safe to use slices with a shared >> underlying array, to be mutated from different goroutine? Every goroutine >> has access to one slice and that slice is only accessible to that one >> goroutine - until the goroutine is done and returns the slice to the pool. > > -- > 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. > For more options, visit https://groups.google.com/d/optout. -- 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. For more options, visit https://groups.google.com/d/optout.
