.

lsldert/Makefile

 LSLBASE=../labstreaminglayer/build/install
 CPPFLAGS+=-Wall -Wno-sign-compare -I$(LSLBASE)/include
-LDFLAGS+=-L$(LSLBASE)/lib -llsl32 -lboost_system -lpthread
-LDFLAGS+=-lpigpio
+LDFLAGS+=-L$(LSLBASE)/lib
 CXX=g++
 CC=gcc
 
 
-LDLIBS+=-lzmq -lpthread -lboost_system -lboost_regex  -lboost_program_options
+LDLIBS+=-lzmq -lboost_program_options -lpigpio -llsl32
+#LDLIBS+=-lzmq -lpthread -lboost_system -lboost_regex  -lboost_program_options
 #INCLUDE+=RS-232
 CXXFLAGS+=-Wall -std=c++11
 
-all: zmq_trigger playtone msgqueue_pubsub zmq_trigger_subscriber playsound
+all: zmq_trigger playtone msgqueue_pubsub zmq_trigger_subscriber playsound lsldertc hwserver hwserver2 hwserver3
 
+lsldertc: lsldertc.c
+hwserver: hwserver.c
+hwserver2: hwserver2.c
+hwserver3: hwserver3.cc
 pcm_min playsound: LDLIBS+=-lm -lasound
 playsound: playsound.c
 pcm_min: pcm_min.c

lsldert/hwserver3.cc

+
+//
+//  Hello World server in C++
+//  Binds REP socket to tcp://*:5555
+//  Expects "Hello" from client, replies with "World"
+//
+#include <zmq.hpp>
+#include <string>
+#include <iostream>
+#ifndef _WIN32
+#include <unistd.h>
+#else
+#include <windows.h>
+
+#define sleep(n)	Sleep(n)
+#endif
+
+int main () {
+    //  Prepare our context and socket
+    zmq::context_t context (1);
+    zmq::socket_t socket (context, ZMQ_REP);
+    socket.bind ("tcp://*:5555");
+
+    zmq::socket_t ssub(context, ZMQ_SUB);
+    ssub.connect("tcp://lsldert00.local:5557");
+    ssub.setsockopt(ZMQ_SUBSCRIBE, "", 0);
+
+    while (true) {
+        zmq::message_t request;
+
+        //  Wait for next request from client
+        socket.recv (&request);
+        std::cout << "Received Hello" << std::endl;
+
+        //  Do some 'work'
+
+        //  Send reply back to client
+        zmq::message_t reply (5);
+        memcpy (reply.data (), "World", 5);
+        socket.send (reply);
+    	//sleep(1);
+    }
+    return 0;
+}

lsldert/zmq_trigger_subscriber.cc

@@ -40,6 +40,7 @@ volatile int run=1 ;
 
 void stop(int signum)
 {
+   printf("\nSignal %d caught. Stopping. Please wait...\n", signum);
    run = 0;
 }
 
@@ -272,66 +273,72 @@ int zmq_recv_multi(zmq::socket_t &socket, zmq::message_t parts[], int nmax)
     int64_t more;
     size_t more_size = sizeof more;
     int n = 0;
-    do {
-        if (n < nmax) {
-            socket.recv(&parts[n]);
-            if (verbose)
-               cout << "recv part " << n << endl;
-            n++;
-        }
-        else {
-            zmq::message_t discard;
-            socket.recv(&discard);
-            if (verbose)
-               cout << "recv part " << n  << " (discarded)." << endl;
-        }
-        socket.getsockopt(ZMQ_RCVMORE, &more, &more_size);
-    } while (more);
+    try {
+       do {
+           if (n < nmax) {
+               socket.recv(&parts[n]);
+               if (verbose)
+                  cout << "recv part " << n << endl;
+               n++;
+           }
+           else {
+               zmq::message_t discard;
+               socket.recv(&discard);
+               if (verbose)
+                  cout << "recv part " << n  << " (discarded)." << endl;
+           }
+           socket.getsockopt(ZMQ_RCVMORE, &more, &more_size);
+       } while (more);
+    }
+    catch (std::exception& error) {
+       cout << "zmq_rev_multi while receiving frame " << n << ": " << error.what() << endl;
+    }
     return n;
 }
 
 int main(int argc, const char* argv[])
 {
-    parse_options(argc, argv);
-
-    if (rtpriority(sched_priority) < 0) {
-       perror("rtpriority");
-       return 1;
-    }
-
-    if(initialize_gpio() < 0)
-    {
-       return 1;
-    }
-
-    //  Prepare our context and socket
-    zmq::context_t context(1);
-    zmq::socket_t srep(context, ZMQ_REP);
-    srep.bind("tcp://*:5555");       
-
-    zmq::socket_t ssub(context, ZMQ_SUB);
-    ssub.connect("tcp://lsldert00.local:5557");
-    ssub.setsockopt(ZMQ_SUBSCRIBE, "", 0);
-
-    zmq::pollitem_t items [] = {
-        { static_cast<void*>(srep), 0, ZMQ_POLLIN, 0 },
-        { static_cast<void*>(ssub), 0, ZMQ_POLLIN, 0 }
-    };
-
-    // make a new stream_info and open an outlet with it
-    stream_info info(
-       info_name.c_str(),
-       info_type.c_str(),
-       1,
-       lsl::IRREGULAR_RATE,
-       lsl::cf_string,
-       info_sourceid.c_str()
-    );
-    outlet = new stream_outlet(info);
-
-    // try {
-       while (run)
+    try {
+       parse_options(argc, argv);
+   
+       if (rtpriority(sched_priority) < 0) {
+          perror("rtpriority");
+          return 1;
+       }
+   
+       if(initialize_gpio() < 0)
        {
+          return 1;
+       }
+   
+       //  Prepare our context and socket
+       zmq::context_t context(1);
+
+       zmq::socket_t ssub(context, ZMQ_SUB);
+       ssub.connect("tcp://lsldert00.local:5557");
+       ssub.setsockopt(ZMQ_SUBSCRIBE, "", 0);
+   
+       zmq::socket_t srep(context, ZMQ_REP);
+       srep.bind("tcp://*:5555");       
+   
+       zmq::pollitem_t items [] = {
+           { static_cast<void*>(srep), 0, ZMQ_POLLIN, 0 },
+           { static_cast<void*>(ssub), 0, ZMQ_POLLIN, 0 }
+       };
+   
+       // make a new stream_info and open an outlet with it
+       stream_info info(
+          info_name.c_str(),
+          info_type.c_str(),
+          1,
+          lsl::IRREGULAR_RATE,
+          lsl::cf_string,
+          info_sourceid.c_str()
+       );
+      outlet = new stream_outlet(info);
+
+      while (run)
+      {
            const int maxmsg=3;
            zmq::message_t msg[maxmsg];
            zmq::message_t& request=msg[0];
@@ -339,21 +346,11 @@ int main(int argc, const char* argv[])
 
            if (verbose)
               cout << "polling" << endl;
-#if 0
-
-          srep.recv(&request);
-          nmsg=1;
-          const char* rep = "OK\0";
-          srep.send(rep, 3);
-#else
-           zmq::poll(items, 2, -1);
-           if (verbose)
-              cout << "done" << endl;
 
+           while (true) {
+           zmq::poll(items, 2, 1);
            if (items [0].revents & ZMQ_POLLIN) {
-              //nmsg=zmq_recv_multi(srep, msg, maxmsg);
-              nmsg=1;
-              srep.recv(&request);
+              nmsg=zmq_recv_multi(srep, msg, maxmsg);
               const char* rep = "OK\0";
               srep.send(rep, 3);
               if (verbose)
@@ -364,9 +361,15 @@ int main(int argc, const char* argv[])
               nmsg=zmq_recv_multi(ssub, msg, maxmsg);
               //ssub.recv(&request);
            }
-           else
-              cout << "zmq::poll: unexpected event" << endl;
-#endif
+           else {
+              //cout << "zmq::poll: unexpected event" << endl;
+              continue;
+           }
+
+           if (verbose)
+              cout << "done" << endl;
+           break;
+           }
 
            std::string str((char*)request.data());
            if (verbose) {
@@ -434,14 +437,13 @@ int main(int argc, const char* argv[])
            }
 
        }
-   // }
-   // catch (boost::system::system_error &e)
-   // {
-   //   error_code ec = e.code();
-   //   std::cerr << ec.value() << '\n';
-   //   std::cerr << ec.category().name() << '\n';
-   // }
-
+    }
+    catch (zmq::error_t& error) {
+       cout << "error: " << error.what() << endl;
+    }
+    catch (std::exception& error) {
+       cout << "error: " << error.what() << endl;
+    }
 
     printf("\nmopping up\n");
     int r=gpioHardwarePWM(pwmpin, 0, 0);