I am too dumb that i thought it was a slice. Thanks a lot : )
On Fri, Aug 17, 2018 at 11:01 PM Ian Lance Taylor <i...@golang.org> wrote:
> On Fri, Aug 17, 2018 at 3:28 AM, <xiaoxub...@gmail.com> wrote:
> >
> > I am new to golang source code, and recently met a problem about
> > understanding golang gc.
> >
> > In runtime/mgcwork.go: 114
> >
> > func (w *gcWork) put(obj uintptr) {
> > flushed := false
> > wbuf := w.wbuf1
> > if wbuf == nil {
> > w.init()
> > wbuf = w.wbuf1
> > // wbuf is empty at this point.
> > } else if wbuf.nobj == len(wbuf.obj) { // why is this the condition
> that
> > wbuf is full?
> > ...
> > }
> >
> >
> >
> >
> > I don't understand why wbuf.nobj == len(wbuf.obj) is the condition that
> wbuf
> > is full. Any help makes sense to me.
>
> If you look at the definition of the workbuf type, you will see that
> the obj field is an array. The nobj field counts the number of
> elements that have been put in the array. When nobj is the length of
> the array, there is no room for any more elements.
>
> Ian
>
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