On Fri, Jun 27, 2014 at 06:09:31PM +0530, Varka Bhadram wrote:
> On 06/27/2014 06:07 PM, Alexander Aring wrote:
> >On Fri, Jun 27, 2014 at 06:00:58PM +0530, Varka Bhadram wrote:
> >>On 06/27/2014 05:52 PM, Alexander Aring wrote:
> >>>On Fri, Jun 27, 2014 at 05:35:00PM +0530, Varka Bhadram wrote:
> >>>>Hi Alex,
> >>>>
> >>>>
> >>>>On 06/27/2014 04:16 PM, Alexander Aring wrote:
> >>>>>+
> >>>>>+static void
> >>>>>+at86rf230_rx(struct at86rf230_local *lp,
> >>>>>+ const u8 *data, u8 len)
> >>>>const u8 len ?
> >>>>
> >>>len will be changed during runtime above, because the transceiver
> >>>doesn't filter if len > IEEE802154_MTU, then I will change it to
> >>>IEEE802154_MTU. See above.
> >>at86rf230_rx_read_frame_complete(void *context)
> >>{
> >> struct at86rf230_state_change *ctx = context;
> >> struct at86rf230_local *lp = ctx->lp;
> >> const u8 *buf = lp->irq.buf;
> >> const u8 len = buf[1];
> >>
> >> at86rf230_rx(lp, buf + 2, len);
> >>}
> >>
> >>const u8 len = buf[1] ?... :-)
> >What you mean here? In this local context of this function len should be
> >const.
>
> len is not changing at runtime ?
>
Of course in the at86rf230_rx function.
Each function has his own stack for a local context and in at86rf230_rx
len is not a pointer as parameter.
In at86rf230_rx_read_frame_complete the local context is const for len,
because we don't change it.
In at86rf230_rx the local context is not const but len is not the same len
like the len in at86rf230_rx_read_frame_complete, because we put it on
the stack.
In at86rf230_rx len will be changed at runtime for the local context of
at86rf230_rx.
- Alex
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