Michael Davidsaver
111 lines
2.7 KiB
C++
111 lines
2.7 KiB
C++
/**
|
|
* Copyright - See the COPYRIGHT that is included with this distribution.
|
|
* pvxs is distributed subject to a Software License Agreement found
|
|
* in file LICENSE that is included with this distribution.
|
|
*/
|
|
/**
|
|
* Serves a single integer PV which increments at a pre-defined rate.
|
|
*/
|
|
|
|
#include <iostream>
|
|
|
|
#include <epicsTime.h>
|
|
#include <epicsStdlib.h>
|
|
#include <epicsEvent.h>
|
|
|
|
#include <pvxs/sharedpv.h>
|
|
#include <pvxs/server.h>
|
|
#include <pvxs/nt.h>
|
|
#include <pvxs/log.h>
|
|
#include <pvxs/util.h>
|
|
|
|
using namespace pvxs;
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
double delay = 1.0;
|
|
|
|
if(argc<=1) {
|
|
std::cerr<<"Usage: "<<argv[0]<<" <pvname> [rateHz]\n";
|
|
return 1;
|
|
}
|
|
|
|
if(argc>=3) {
|
|
double rate = 0.0;
|
|
|
|
if(epicsParseDouble(argv[2], &rate, nullptr) || rate<=0.0) {
|
|
std::cerr<<"Rate must be a positive number, not "<<argv[2]<<"\n";
|
|
return 1;
|
|
}
|
|
|
|
delay = 1.0/rate;
|
|
}
|
|
|
|
// Read $PVXS_LOG from process environment and update
|
|
// logging configuration. eg.
|
|
// export PVXS_LOG=*=DEBUG
|
|
// makes a lot of noise.
|
|
logger_config_env();
|
|
|
|
// Must provide a data type for the mailbox.
|
|
// Use pre-canned definition of scalar with meta-data
|
|
Value initial = nt::NTScalar{TypeCode::UInt32}.create();
|
|
|
|
// (optional) Provide an initial value
|
|
initial["value"] = 0u;
|
|
initial["alarm.severity"] = 0;
|
|
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::buildReadonly());
|
|
|
|
// Associate a data type (and maybe initial value) with this PV
|
|
pv.open(initial);
|
|
|
|
// Build server which will server this PV
|
|
// Configure using process environment.
|
|
server::Server serv = server::Config::from_env()
|
|
.build()
|
|
.addPV(argv[1], pv);
|
|
|
|
// (optional) Print the configuration this server is using
|
|
// with any auto-address list expanded.
|
|
std::cout<<"Effective config\n"<<serv.config();
|
|
|
|
// event used to signal exit, and for delay timer
|
|
epicsEvent done;
|
|
|
|
// connect to SIGINT/SIGTERM to break from main loop
|
|
SigInt handle([&done]() {
|
|
done.trigger();
|
|
});
|
|
|
|
// Start server in background
|
|
serv.start();
|
|
|
|
std::cout<<"Running\n";
|
|
|
|
uint32_t count = 0u;
|
|
|
|
while(!done.wait(delay)) {
|
|
auto val = initial.cloneEmpty();
|
|
|
|
val["value"] = count++;
|
|
|
|
pv.post(std::move(val));
|
|
|
|
std::cout<<"Count "<<count<<"\n";
|
|
}
|
|
|
|
// (optional) explicitly stop server.
|
|
// Implied when 'serv' goes out of scope
|
|
serv.stop();
|
|
|
|
std::cout<<"Done\n";
|
|
|
|
return 0;
|
|
}
|