rpcSquare/rpcSquare.cpp

This example shows an PVAction node used for RPC-like functionality.

#include <nds3/nds.h>

class RPCSquare
{
public:
  RPCSquare(nds::Factory& factory, const std::string& device,
            const nds::namedParameters_t& parameters);


  void square(const timespec& timestamp, const std::int32_t& value);

  void init(timespec* timestamp, std::int32_t* value);

private:

  nds::PVAction squarePV;
};

RPCSquare::RPCSquare(nds::Factory& factory, const std::string& device,
                     const nds::namedParameters_t& parameters)
{
  nds::Port rootNode(device);

  squarePV = nds::PVAction(
    "Square", std::bind(&RPCSquare::square, this,
                             std::placeholders::_1, std::placeholders::_2),
    std::bind(&RPCSquare::init, this, std::placeholders::_1,
              std::placeholders::_2));
  squarePV.setDescription("Square any integer");
  rootNode.addChild(squarePV);

  rootNode.initialize(this, factory);
}

void
RPCSquare::square(const timespec& timestamp, const std::int32_t& value)
{
  squarePV.setValueBack(timestamp, value*value);
}

void
RPCSquare::init(timespec* timestamp, std::int32_t* value)
{
  *value = 0;
}

NDS_DEFINE_DRIVER(RPCSquare, RPCSquare)