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create second dbChannel for DBE_PROPERTY

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Create second channel, and second set of filter states,
for subscription to DBE_PROPERTY.  Accommodate filters
which drop events.
This commit is contained in:
Michael Davidsaver
2020-07-02 22:44:28 -07:00
parent e843db5d27
commit 4559f483bf
2 changed files with 8 additions and 1 deletions
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7
pdbApp/pdbsingle.cpp
View File

@ -103,6 +103,10 @@ PDBSinglePV::PDBSinglePV(DBCH& chan,
,hadevent_VALUE(false)
,hadevent_PROPERTY(false)
{
if(ellCount(&chan.chan->pre_chain) || ellCount(&chan.chan->post_chain)) {
DBCH temp(dbChannelName(chan.chan));
this->chan2.swap(temp);
}
this->chan.swap(chan);
fielddesc = std::tr1::static_pointer_cast<const pvd::Structure>(builder->dtype(this->chan));
@ -120,8 +124,9 @@ PDBSinglePV::~PDBSinglePV()
void PDBSinglePV::activate()
{
dbChannel *pchan = this->chan2.chan ? this->chan2.chan : this->chan.chan;
evt_VALUE.create(provider->event_context, this->chan, &pdb_single_event, DBE_VALUE|DBE_ALARM);
evt_PROPERTY.create(provider->event_context, this->chan, &pdb_single_event, DBE_PROPERTY);
evt_PROPERTY.create(provider->event_context, pchan, &pdb_single_event, DBE_PROPERTY);
}
pva::Channel::shared_pointer

2
pdbApp/pdbsingle.h
View File

@ -30,6 +30,8 @@ struct QSRV_API PDBSinglePV : public PDBPV
* is locked.
*/
DBCH chan;
// used for DBE_PROPERTY subscription when chan has filters
DBCH chan2;
PDBProvider::shared_pointer provider;
// only for use in pdb_single_event()