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Glas :Re: [glas] Reference counting? |
From: Russell Smiley (smiley_at_[hidden])
Date: 2007-10-12 10:34:45
> -----Original Message-----
> From: Russell Smiley
> Subject: Re: [glas] Reference counting?
>
> > -----Original Message-----
> > From: Karl Meerbergen
> > Subject: Re: [glas] Reference counting?
> >
> > * if v and w are two vectors (or vector views), what does the
> > operation
> > w = v do ?
> >
>
> In my implementation of a reference counted object w=v means that w
> drops the reference to its current storage (with a resulting decrement
> to the reference count for that object) and then picks up the
> reference
> to the storage in v with a resulting increment to that
> reference count.
> I think this is the most useful for general application.
>
> If you want to copy values from the v storage into the w storage then
> there are two separate methods:
>
> w.value_copy(v) - copies values from v, but w dereferences current
> storage and creates a new 'blank' storage before the copy.
>
> w.value_copy_this_reference(v) - copies values from v into the current
> storage of w.
>
I forgot there is a third method:
w.value_copy() which tells w to start a reference to new storage copying
the values from the old storage.
Russell.