Replace boost features with C++11 equivalents (#58)

* Replace boost features with C++11 equivalents

Signed-off-by: Jacob Perron <jacob@openrobotics.org>

* Include <cmath> in util.h

Needed for std::abs

Signed-off-by: Jacob Perron <jacob@openrobotics.org>

include/create/create.h

@@ -32,9 +32,9 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef CREATE_H
 #define CREATE_H
 
-#include <boost/shared_ptr.hpp>
 #include <boost/numeric/ublas/matrix.hpp>
 #include <chrono>
+#include <memory>
 #include <string>
 #include <unistd.h>
 
@@ -96,8 +96,8 @@ namespace create {
       bool updateLEDs();
 
     protected:
-      boost::shared_ptr<create::Data> data;
-      boost::shared_ptr<create::Serial> serial;
+      std::shared_ptr<create::Data> data;
+      std::shared_ptr<create::Serial> serial;
 
     public:
       /**

include/create/data.h

@@ -32,9 +32,8 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef CREATE_DATA_H
 #define CREATE_DATA_H
 
-#include <boost/shared_ptr.hpp>
-#include <boost/make_shared.hpp>
 #include <map>
+#include <memory>
 #include <vector>
 
 #include "create/packet.h"
@@ -43,7 +42,7 @@ POSSIBILITY OF SUCH DAMAGE.
 namespace create {
   class Data {
     private:
-      std::map<uint8_t, boost::shared_ptr<Packet> > packets;
+      std::map<uint8_t, std::shared_ptr<Packet> > packets;
       uint32_t totalDataBytes;
       std::vector<uint8_t> ids;
 
@@ -52,7 +51,7 @@ namespace create {
       ~Data();
 
       bool isValidPacketID(const uint8_t id) const;
-      boost::shared_ptr<Packet> getPacket(const uint8_t id);
+      std::shared_ptr<Packet> getPacket(const uint8_t id);
       void validateAll();
       uint32_t getTotalDataBytes() const;
       uint8_t getNumPackets() const;

include/create/packet.h

@@ -31,15 +31,15 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef CREATE_PACKET_H
 #define CREATE_PACKET_H
 
-#include <boost/thread/mutex.hpp>
+#include <mutex>
 
 namespace create {
   class Packet {
     private:
       uint16_t data;
       uint16_t tmpData;
-      mutable boost::mutex dataMutex;
-      mutable boost::mutex tmpDataMutex;
+      mutable std::mutex dataMutex;
+      mutable std::mutex tmpDataMutex;
 
     protected:
       // Thread safe

include/create/serial.h

@@ -35,19 +35,20 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef CREATE_SERIAL_H
 #define CREATE_SERIAL_H
 
+#include <condition_variable>
+#include <functional>
+#include <memory>
+#include <mutex>
+#include <thread>
+
 #include <boost/asio.hpp>
-#include <boost/thread.hpp>
-#include <boost/thread/condition_variable.hpp>
-#include <boost/function.hpp>
-#include <boost/shared_ptr.hpp>
-#include <boost/enable_shared_from_this.hpp>
 
 #include "create/data.h"
 #include "create/types.h"
 #include "create/util.h"
 
 namespace create {
-  class Serial : public boost::enable_shared_from_this<Serial> {
+  class Serial : public std::enable_shared_from_this<Serial> {
 
     protected:
       boost::asio::io_service io;
@@ -55,9 +56,9 @@ namespace create {
       boost::asio::serial_port port;
 
     private:
-      boost::thread ioThread;
-      boost::condition_variable dataReadyCond;
-      boost::mutex dataReadyMut;
+      std::thread ioThread;
+      std::condition_variable dataReadyCond;
+      std::mutex dataReadyMut;
       bool dataReady;
       bool isReading;
       bool firstRead;
@@ -66,13 +67,13 @@ namespace create {
       // Callback executed when data arrives from Create
       void onData(const boost::system::error_code& e, const std::size_t& size);
       // Callback to execute once data arrives
-      boost::function<void()> callback;
+      std::function<void()> callback;
       // Start and stop reading data from Create
       bool startReading();
       void stopReading();
 
     protected:
-      boost::shared_ptr<Data> data;
+      std::shared_ptr<Data> data;
       // These are for possible diagnostics
       uint64_t corruptPackets;
       uint64_t totalPackets;
@@ -85,9 +86,9 @@ namespace create {
       void notifyDataReady();
 
     public:
-      Serial(boost::shared_ptr<Data> data);
+      Serial(std::shared_ptr<Data> data);
       ~Serial();
-      bool connect(const std::string& port, const int& baud = 115200, boost::function<void()> cb = 0);
+      bool connect(const std::string& port, const int& baud = 115200, std::function<void()> cb = 0);
       void disconnect();
       inline bool connected() const { return port.is_open(); };
       bool send(const uint8_t* bytes, const uint32_t numBytes);

include/create/serial_query.h

@@ -36,11 +36,9 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef CREATE_SERIAL_QUERY_H
 #define CREATE_SERIAL_QUERY_H
 
+#include <memory>
+
 #include <boost/asio.hpp>
-#include <boost/thread.hpp>
-#include <boost/thread/condition_variable.hpp>
-#include <boost/function.hpp>
-#include <boost/shared_ptr.hpp>
 
 #include "create/data.h"
 #include "create/types.h"
@@ -69,7 +67,7 @@ namespace create {
       void processByte(uint8_t byteRead);
 
     public:
-      SerialQuery(boost::shared_ptr<Data> data);
+      SerialQuery(std::shared_ptr<Data> data);
   };
 }  // namespace create
 

include/create/serial_stream.h

@@ -35,11 +35,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef CREATE_SERIAL_STREAM_H
 #define CREATE_SERIAL_STREAM_H
 
-#include <boost/asio.hpp>
-#include <boost/thread.hpp>
-#include <boost/thread/condition_variable.hpp>
-#include <boost/function.hpp>
-#include <boost/shared_ptr.hpp>
+#include <memory>
 
 #include "create/data.h"
 #include "create/types.h"
@@ -73,7 +69,7 @@ namespace create {
       void processByte(uint8_t byteRead);
 
     public:
-      SerialStream(boost::shared_ptr<Data> data, const uint8_t& header = create::util::STREAM_HEADER);
+      SerialStream(std::shared_ptr<Data> data, const uint8_t& header = create::util::STREAM_HEADER);
 
   };
 }  // namespace create

include/create/util.h

@@ -32,6 +32,8 @@ POSSIBILITY OF SUCH DAMAGE.
 #ifndef CREATE_UTIL_H
 #define CREATE_UTIL_H
 
+#include <cmath>
+
 #define COUT(prefix,msg) (std::cout<<prefix<<msg<<std::endl)
 #define CERR(prefix,msg) (std::cerr<<prefix<<msg<<std::endl)
 

src/create.cpp

@@ -1,8 +1,7 @@
-#include <boost/bind.hpp>
-#include <boost/make_shared.hpp>
 #include <iostream>
 #include <cmath>
 #include <ctime>
+#include <memory>
 #include <assert.h>
 
 #include "create/create.h"
@@ -42,11 +41,11 @@ namespace create {
     poseCovar = Matrix(3, 3, 0.0);
     requestedLeftVel = 0;
     requestedRightVel = 0;
-    data = boost::shared_ptr<Data>(new Data(model.getVersion()));
+    data = std::shared_ptr<Data>(new Data(model.getVersion()));
     if (model.getVersion() == V_1) {
-      serial = boost::make_shared<SerialQuery>(data);
+      serial = std::make_shared<SerialQuery>(data);
     } else {
-      serial = boost::make_shared<SerialStream>(data);
+      serial = std::make_shared<SerialStream>(data);
     }
   }
 
@@ -273,7 +272,7 @@ namespace create {
     float maxWait = 30; // seconds
     float retryInterval = 5; //seconds
     time(&start);
-    while (!serial->connect(port, baud, boost::bind(&Create::onData, this)) && !timeout) {
+    while (!serial->connect(port, baud, std::bind(&Create::onData, this)) && !timeout) {
       time(&now);
       if (difftime(now, start) > maxWait) {
         timeout = true;

src/data.cpp

@@ -1,6 +1,6 @@
 #include "create/data.h"
 
-#define ADD_PACKET(id,nbytes,info,enabledVersion) if ((enabledVersion) & version) packets[id]=boost::make_shared<Packet>(nbytes,info)
+#define ADD_PACKET(id,nbytes,info,enabledVersion) if ((enabledVersion) & version) packets[id]=std::make_shared<Packet>(nbytes,info)
 
 namespace create {
 
@@ -45,7 +45,7 @@ namespace create {
     ADD_PACKET(ID_STASIS, 1, "stasis", V_3);
 
     totalDataBytes = 0;
-    for (std::map<uint8_t, boost::shared_ptr<Packet> >::iterator it = packets.begin();
+    for (std::map<uint8_t, std::shared_ptr<Packet> >::iterator it = packets.begin();
          it != packets.end();
          ++it) {
       ids.push_back(it->first);
@@ -62,15 +62,15 @@ namespace create {
     return false;
   }
 
-  boost::shared_ptr<Packet> Data::getPacket(uint8_t id) {
+  std::shared_ptr<Packet> Data::getPacket(uint8_t id) {
     if (isValidPacketID(id)) {
       return packets[id];
     }
-    return boost::shared_ptr<Packet>();
+    return std::shared_ptr<Packet>();
   }
 
   void Data::validateAll() {
-    for (std::map<uint8_t, boost::shared_ptr<Packet> >::iterator it = packets.begin();
+    for (std::map<uint8_t, std::shared_ptr<Packet> >::iterator it = packets.begin();
          it != packets.end();
          ++it) {
       it->second->validate();

src/packet.cpp

@@ -1,3 +1,5 @@
+#include <memory>
+
 #include "create/packet.h"
 
 namespace create {
@@ -11,22 +13,22 @@ namespace create {
   Packet::~Packet() { }
 
   void Packet::setDataToValidate(const uint16_t& tmp) {
-    boost::mutex::scoped_lock lock(tmpDataMutex);
+    std::lock_guard<std::mutex> lock(tmpDataMutex);
     tmpData = tmp;
   }
 
   void Packet::validate() {
-    boost::mutex::scoped_lock lock(tmpDataMutex);
+    std::lock_guard<std::mutex> lock(tmpDataMutex);
     setData(tmpData);
   }
 
   void Packet::setData(const uint16_t& d) {
-    boost::mutex::scoped_lock lock(dataMutex);
+    std::lock_guard<std::mutex> lock(dataMutex);
     data = d;
   }
 
   uint16_t Packet::getData() const {
-    boost::mutex::scoped_lock lock(dataMutex);
+    std::lock_guard<std::mutex> lock(dataMutex);
     return data;
   }
 

src/serial.cpp

@@ -1,3 +1,5 @@
+#include <chrono>
+#include <functional>
 #include <iostream>
 
 #include "create/serial.h"
@@ -5,7 +7,7 @@
 
 namespace create {
 
-  Serial::Serial(boost::shared_ptr<Data> d) :
+  Serial::Serial(std::shared_ptr<Data> d) :
     signals(io, SIGINT, SIGTERM),
     port(io),
     dataReady(false),
@@ -31,7 +33,7 @@ namespace create {
     }
   }
 
-  bool Serial::connect(const std::string& portName, const int& baud, boost::function<void()> cb) {
+  bool Serial::connect(const std::string& portName, const int& baud, std::function<void()> cb) {
     using namespace boost::asio;
     port.open(portName);
     port.set_option(serial_port::baud_rate(baud));
@@ -40,7 +42,7 @@ namespace create {
     port.set_option(serial_port::stop_bits(serial_port::stop_bits::one));
     port.set_option(serial_port::flow_control(serial_port::flow_control::none));
 
-    signals.async_wait(boost::bind(&Serial::signalHandler, this, _1, _2));
+    signals.async_wait(std::bind(&Serial::signalHandler, this, std::placeholders::_1, std::placeholders::_2));
 
     usleep(1000000);
 
@@ -90,17 +92,22 @@ namespace create {
     // Start continuously reading one byte at a time
     boost::asio::async_read(port,
                             boost::asio::buffer(&byteRead, 1),
-                            boost::bind(&Serial::onData, shared_from_this(), _1, _2));
+                            std::bind(&Serial::onData,
+                                      shared_from_this(),
+                                      std::placeholders::_1,
+                                      std::placeholders::_2));
 
-    ioThread = boost::thread(boost::bind(&boost::asio::io_service::run, &io));
+    ioThread = std::thread(std::bind(
+        static_cast<std::size_t(boost::asio::io_service::*)(void)>(
+          &boost::asio::io_service::run), &io));
 
     // Wait for first complete read to finish
-    boost::unique_lock<boost::mutex> lock(dataReadyMut);
+    std::unique_lock<std::mutex> lock(dataReadyMut);
 
     int attempts = 1;
     int maxAttempts = 10;
     while (!dataReady) {
-      if (!dataReadyCond.timed_wait(lock, boost::get_system_time() + boost::posix_time::milliseconds(500))) {
+      if (dataReadyCond.wait_for(lock, std::chrono::milliseconds(500)) == std::cv_status::timeout) {
         if (attempts >= maxAttempts) {
           CERR("[create::Serial] ", "failed to receive data from Create. Check if robot is powered!");
           io.stop();
@@ -125,7 +132,7 @@ namespace create {
       ioThread.join();
       isReading = false;
       {
-        boost::lock_guard<boost::mutex> lock(dataReadyMut);
+        std::lock_guard<std::mutex> lock(dataReadyMut);
         dataReady = false;
       }
     }
@@ -138,7 +145,7 @@ namespace create {
 
     // Notify first data packets ready
     {
-      boost::lock_guard<boost::mutex> lock(dataReadyMut);
+      std::lock_guard<std::mutex> lock(dataReadyMut);
       if (!dataReady) {
         dataReady = true;
         dataReadyCond.notify_one();
@@ -163,7 +170,10 @@ namespace create {
     // Read the next byte
     boost::asio::async_read(port,
                             boost::asio::buffer(&byteRead, 1),
-                            boost::bind(&Serial::onData, shared_from_this(), _1, _2));
+                            std::bind(&Serial::onData,
+                                      shared_from_this(),
+                                      std::placeholders::_1,
+                                      std::placeholders::_2));
   }
 
   bool Serial::send(const uint8_t* bytes, unsigned int numBytes) {

src/serial_query.cpp

@@ -1,4 +1,5 @@
 #include <iostream>
+#include <memory>
 
 #include "create/serial_query.h"
 #include "create/types.h"
@@ -7,7 +8,7 @@
 
 namespace create {
 
-  SerialQuery::SerialQuery(boost::shared_ptr<Data> d) : Serial(d),
+  SerialQuery::SerialQuery(std::shared_ptr<Data> d) : Serial(d),
     streamRecoveryTimer(io),
     packetID(ID_BUMP_WHEELDROP),
     packetByte(0),
@@ -30,7 +31,8 @@ namespace create {
     send(requestPacket, 2);
     // Automatically resend request if no response is received
     streamRecoveryTimer.expires_from_now(boost::posix_time::milliseconds(50));
-    streamRecoveryTimer.async_wait(boost::bind(&SerialQuery::restartSensorStream, this, _1));
+    streamRecoveryTimer.async_wait(
+      std::bind(&SerialQuery::restartSensorStream, this, std::placeholders::_1));
   }
 
   void SerialQuery::restartSensorStream(const boost::system::error_code& err) {

src/serial_stream.cpp

@@ -1,11 +1,12 @@
 #include <iostream>
+#include <memory>
 
 #include "create/serial_stream.h"
 #include "create/types.h"
 
 namespace create {
 
-  SerialStream::SerialStream(boost::shared_ptr<Data> d, const uint8_t& header) : Serial(d), readState(READ_HEADER), headerByte(header) {
+  SerialStream::SerialStream(std::shared_ptr<Data> d, const uint8_t& header) : Serial(d), readState(READ_HEADER), headerByte(header) {
   }
 
   bool SerialStream::startSensorStream() {

tests/test_create.cpp

@@ -33,8 +33,6 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include "gtest/gtest.h"
 
-#include <boost/shared_ptr.hpp>
-
 TEST(CreateTest, ConstructorSingleParam)
 {
   create::Create create_default;

tests/test_data.cpp

@@ -34,7 +34,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include "gtest/gtest.h"
 
-#include <boost/shared_ptr.hpp>
+#include <memory>
 
 TEST(DataTest, Constructor)
 {
@@ -76,31 +76,31 @@ TEST(DataTest, GetPacket)
 {
   // Get a packet exclusive to V_1
   create::Data data_v_1(create::V_1);
-  boost::shared_ptr<create::Packet> v_1_packet_ptr = data_v_1.getPacket(create::ID_OVERCURRENTS);
-  EXPECT_NE(v_1_packet_ptr, boost::shared_ptr<create::Packet>())
+  std::shared_ptr<create::Packet> v_1_packet_ptr = data_v_1.getPacket(create::ID_OVERCURRENTS);
+  EXPECT_NE(v_1_packet_ptr, std::shared_ptr<create::Packet>())
       << "ID_OVERCURRENTS packet not found for protocol V_1";
   EXPECT_EQ(static_cast<int>(v_1_packet_ptr->nbytes), 1);
   EXPECT_EQ(v_1_packet_ptr->info, std::string("overcurrents"));
 
   // Get a packet for V_2
   create::Data data_v_2(create::V_2);
-  boost::shared_ptr<create::Packet> v_2_packet_ptr = data_v_2.getPacket(create::ID_DISTANCE);
-  EXPECT_NE(v_2_packet_ptr, boost::shared_ptr<create::Packet>())
+  std::shared_ptr<create::Packet> v_2_packet_ptr = data_v_2.getPacket(create::ID_DISTANCE);
+  EXPECT_NE(v_2_packet_ptr, std::shared_ptr<create::Packet>())
       << "ID_DISTANCE packet not found for protocol V_2";
   EXPECT_EQ(static_cast<int>(v_2_packet_ptr->nbytes), 2);
   EXPECT_EQ(v_2_packet_ptr->info, std::string("distance"));
 
   // Get a packet exclusive to V_3
   create::Data data_v_3(create::V_3);
-  boost::shared_ptr<create::Packet> v_3_packet_ptr = data_v_3.getPacket(create::ID_LIGHT_FRONT_RIGHT);
-  EXPECT_NE(v_3_packet_ptr, boost::shared_ptr<create::Packet>())
+  std::shared_ptr<create::Packet> v_3_packet_ptr = data_v_3.getPacket(create::ID_LIGHT_FRONT_RIGHT);
+  EXPECT_NE(v_3_packet_ptr, std::shared_ptr<create::Packet>())
       << "ID_LIGHT_FRONT_RIGHT packet not found for protocol V_3";
   EXPECT_EQ(static_cast<int>(v_3_packet_ptr->nbytes), 2);
   EXPECT_EQ(v_3_packet_ptr->info, std::string("light_bumper_front_right"));
 
   // Get a non-existent packet
-  boost::shared_ptr<create::Packet> not_a_packet_ptr = data_v_3.getPacket(60);
-  EXPECT_EQ(not_a_packet_ptr, boost::shared_ptr<create::Packet>());
+  std::shared_ptr<create::Packet> not_a_packet_ptr = data_v_3.getPacket(60);
+  EXPECT_EQ(not_a_packet_ptr, std::shared_ptr<create::Packet>());
 }
 
 TEST(DataTest, GetPacketIDs)

tests/test_serial_query.cpp

@@ -33,17 +33,17 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include "gtest/gtest.h"
 
-#include <boost/shared_ptr.hpp>
+#include <memory>
 
 TEST(SerialQueryTest, Constructor)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialQuery serial_query(data_ptr);
 }
 
 TEST(SerialQueryTest, Connected)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialQuery serial_query(data_ptr);
 
   // Did not call connect and nothing to connect to, so expect false
@@ -52,7 +52,7 @@ TEST(SerialQueryTest, Connected)
 
 TEST(SerialQueryTest, Disconnect)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialQuery serial_query(data_ptr);
 
   // Not connected, but should not fail
@@ -61,7 +61,7 @@ TEST(SerialQueryTest, Disconnect)
 
 TEST(SerialQueryTest, NumPackets)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialQuery serial_query(data_ptr);
 
   // Not connected, so zero packets should have been received
@@ -71,7 +71,7 @@ TEST(SerialQueryTest, NumPackets)
 
 TEST(SerialQueryTest, Send)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialQuery serial_query(data_ptr);
 
   // Some bytes to send (to set date)
@@ -82,7 +82,7 @@ TEST(SerialQueryTest, Send)
 
 TEST(SerialQueryTest, SendOpcode)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialQuery serial_query(data_ptr);
 
   // Not connected, so failure expected

tests/test_serial_stream.cpp

@@ -33,17 +33,17 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include "gtest/gtest.h"
 
-#include <boost/shared_ptr.hpp>
+#include <memory>
 
 TEST(SerialStreamTest, Constructor)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialStream serial_stream(data_ptr);
 }
 
 TEST(SerialStreamTest, Connected)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialStream serial_stream(data_ptr);
 
   // Did not call connect and nothing to connect to, so expect false
@@ -52,7 +52,7 @@ TEST(SerialStreamTest, Connected)
 
 TEST(SerialStreamTest, Disconnect)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialStream serial_stream(data_ptr);
 
   // Not connected, but should not fail
@@ -61,7 +61,7 @@ TEST(SerialStreamTest, Disconnect)
 
 TEST(SerialStreamTest, NumPackets)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialStream serial_stream(data_ptr);
 
   // Not connected, so zero packets should have been received
@@ -71,7 +71,7 @@ TEST(SerialStreamTest, NumPackets)
 
 TEST(SerialStreamTest, Send)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialStream serial_stream(data_ptr);
 
   // Some bytes to send (to set date)
@@ -82,7 +82,7 @@ TEST(SerialStreamTest, Send)
 
 TEST(SerialStreamTest, SendOpcode)
 {
-  boost::shared_ptr<create::Data> data_ptr = boost::make_shared<create::Data>();
+  std::shared_ptr<create::Data> data_ptr = std::make_shared<create::Data>();
   create::SerialStream serial_stream(data_ptr);
 
   // Not connected, so failure expected