add request/reply example

examples/req-rep/client.winxed

@@ -0,0 +1,18 @@
+$include_const 'ZeroMQ/Constants.pasm';
+
+function main[main](var argv) {
+  load_bytecode('ZeroMQ.pbc');
+
+  var ctx  = new ZeroMQ.Context();
+  var sock = ctx.socket(ZMQ_REQ);
+  sock.connect("tcp://127.0.0.1:2468");
+
+  for (int i = 0; i < 10; i++) {
+    var req = new ZeroMQ.Message(string(i));
+    sock.send(req);
+
+    var rep = new ZeroMQ.Message();
+    sock.recv(rep);
+    say(string(rep));
+  }
+}

examples/req-rep/server.winxed

@@ -0,0 +1,16 @@
+$include_const 'ZeroMQ/Constants.pasm';
+
+function main[main](var argv) {
+  load_bytecode('ZeroMQ.pbc');
+
+  var ctx  = new ZeroMQ.Context();
+  var sock = ctx.socket(ZMQ_REP);
+  sock.bind("tcp://127.0.0.1:2468");
+
+  for (;;) {
+    var msg = new ZeroMQ.Message();
+    sock.recv(msg);
+    msg = new ZeroMQ.Message(string(msg) + " confirmed");
+    sock.send(msg);
+  }
+}