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This commit is contained in:
Michael Davidsaver
2021-01-26 21:58:14 -08:00
parent d50c63cbb6
commit ecafd9b89c
1 changed files with 45 additions and 36 deletions
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example/mailbox.cpp
+45 -36
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@@ -23,7 +23,7 @@ using namespace pvxs;
int main(int argc, char* argv[])
{
if(argc<=1) {
std::cerr<<"Usage: "<<argv[0]<<" <pvname>\n";
std::cerr<<"Usage: "<<argv[0]<<" <pvname> [pvname1 [...]]\n";
return 1;
}
@@ -43,51 +43,60 @@ int main(int argc, char* argv[])
initial["alarm.status"] = 0;
initial["alarm.message"] = "";
// Actually creating the mailbox PV.
// buildMailbox() installs a default onPut() handler which
// stores whatever a client sends (subject to our data type).
server::SharedPV pv(server::SharedPV::buildMailbox());
std::vector<server::SharedPV> pvs(argc-1u);
// (optional) Replace the default PUT handler to do a range check
pv.onPut([](server::SharedPV& pv,
std::unique_ptr<server::ExecOp>&& op,
Value&& top)
{
for(size_t i=0ul; i<pvs.size(); i++) {
// Actually creating a mailbox PV.
// buildMailbox() installs a default onPut() handler which
// stores whatever a client sends (subject to our data type).
server::SharedPV pv(server::SharedPV::buildMailbox());
// (optional) arbitrarily clip value to [-100.0, 100.0]
double val(top["value"].as<double>());
if(val<-100.0)
top["value"] = -100.0;
else if(val>100.0)
top["value"] = 100.0;
// (optional) Replace the default PUT handler to do a range check
pv.onPut([](server::SharedPV& pv,
std::unique_ptr<server::ExecOp>&& op,
Value&& top)
{
// (optional) Provide a timestamp if the client has not (common)
Value ts(top["timeStamp"]);
if(!ts.isMarked(true, true)) {
// use current time
epicsTimeStamp now;
if(!epicsTimeGetCurrent(&now)) {
ts["secondsPastEpoch"] = now.secPastEpoch + POSIX_TIME_AT_EPICS_EPOCH;
ts["nanoseconds"] = now.nsec;
}
}
// (optional) arbitrarily clip value to [-100.0, 100.0]
double val(top["value"].as<double>());
if(val<-100.0)
top["value"] = -100.0;
else if(val>100.0)
top["value"] = 100.0;
// (optional) update the SharedPV cache and send
// a update to any subscribers
pv.post(top);
// (optional) Provide a timestamp if the client has not (common)
Value ts(top["timeStamp"]);
if(!ts.isMarked(true, true)) {
// use current time
epicsTimeStamp now;
if(!epicsTimeGetCurrent(&now)) {
ts["secondsPastEpoch"] = now.secPastEpoch + POSIX_TIME_AT_EPICS_EPOCH;
ts["nanoseconds"] = now.nsec;
}
}
// Required. Inform client that PUT operation is complete.
op->reply();
});
// (optional) update the SharedPV cache and send
// a update to any subscribers
pv.post(top);
// Associate a data type (and maybe initial value) with this PV
pv.open(initial);
// Required. Inform client that PUT operation is complete.
op->reply();
});
// Associate a data type (and maybe initial value) with this PV
pv.open(initial);
pvs[i] = std::move(pv);
}
// Build server which will serve this PV
// Configure using process environment.
server::Server serv = server::Config::fromEnv()
.build()
.addPV(argv[1], pv);
.build();
for(size_t i=0ul; i<pvs.size(); i++) {
serv.addPV(argv[i+1], pvs[i]);
}
// (optional) Print the configuration this server is using
// with any auto-address list expanded.