Am 17.03.2014 um 00:59 schrieb John Kasunich <[email protected]>:
> Implementation of the "copy dummy to signal" fix would look
> something like:
>
>
> 1093 /* everything is OK, make the new link */
> 1094 data_ptr_addr = SHMPTR(pin->data_ptr_addr);
> 1095 comp = SHMPTR(pin->owner_ptr);
> 1096 data_addr = comp->shmem_base + sig->data_ptr;
> 1097 *data_ptr_addr = data_addr;
> new if (( sig->readers == 0 ) && ( sig->writers == 0 ) && ( sig->bidirs
> == 0 )) {
> new /* this is the first pin for this signal, copy value from pin's
> "dummy" field */
> new memcpy(data_addr, &pin->dummysig, sizeof(hal_data_u));
> 1098 /* update the signal's reader/writer/bidir counts */
that assumes: 'copy value on first link ever'
a more robust interpretation would be:
'copy value on link to first pin which is HAL_OUT or HAL_IO'
you could shuffle .hal lines (assuming a HAL_OUT, not HAL_IO) and still get the
same result
not sure it's a valuable distinction, probably 'inherit value from first linked
pin in a .hal file' is the more easily remembered semantics
- Michael
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