No. It's not true that all sleeps might return spuriously (it might have been true in Unix, I can't remember). It's not true in Plan 9.
On 23 August 2012 12:24, erik quanstrom <[email protected]> wrote: > > sleep(&up->waitr, haswaitq, up); > > > > lock(&up->exl); > > wq = up->waitq; > > up->waitq = wq->next; <-- wq == nil, boom! its gone! > > up->nwait--; > > unlock(&up->exl); > > > > > > if sleep returns or is spuriously woken up even tho up->waitq == nil. > > ah, right. looks like a bug. > > - erik > >
