USRPPropTree.hxx

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/*
  Copyright (c) 2015, Matthew H. Reilly (kb1vc)
  All rights reserved.
 
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
  met:
 
  Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
  Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in
  the documentation and/or other materials provided with the
  distribution.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
 
#ifndef USRP_PROP_TREE_HDR
#define USRP_PROP_TREE_HDR
 
#include <string>
#include <uhd/usrp/multi_usrp.hpp>
#include <uhd/property_tree.hpp>
#include <SoDa/Format.hxx>
#include <iostream>
 
namespace SoDa
{
class USRPPropTree
{
public:
  USRPPropTree(const uhd::usrp::multi_usrp::sptr usrp, const std::string &requester, int mb_index = 0)
  {
    client_name = requester;
    try
    {
      mb0_name = usrp->get_device()->get_tree()->list("/mboards").at(mb_index);
    }
    catch (std::runtime_error e)
    {
      complain((SoDa::Format("Exception looking for motherboard %0").addI(mb_index)).str(), e, false);
    }
 
    // the object is to create a tree rooted at the first motherboard.
    fqpn = "/mboards/" + mb0_name;
    try
    {
      tree = usrp->get_device()->get_tree()->subtree(fqpn);
    }
    catch (std::runtime_error e)
    {
      complain("Exception while creating initial motherboard property tree", fqpn, e, false);
    }
  }

  USRPPropTree(USRPPropTree *ptree, const std::string &path)
  {
    init(ptree, path);
  }

  USRPPropTree(USRPPropTree &ptree, const std::string &path)
  {
    init(&ptree, path);
  }

  bool hasProperty(const std::string &propname)
  {
    bool ret = false;
    try
    {
      std::vector<std::string> pslis = tree->list("");
      ret = std::find(pslis.begin(), pslis.end(), propname) != pslis.end();
    }
    catch (std::runtime_error e)
    {
      complain("Exception while looking for property", fqpn + "/" + propname, e, false);
    }
    return ret;
  }
 
  std::vector<std::string> getPropNames(const std::string &path = std::string(""))
  {
    return tree->list(path);
  }
 
  std::string getStringProp(const std::string &propname, const std::string defval = std::string("None"))
  {
    return getProperty<std::string>(propname, defval);
  }
 
  int getIntProp(const std::string &propname, const int defval = 0)
  {
    return getProperty<int>(propname, defval);
  }
 
  int getDoubleProp(const std::string &propname, const double defval = 0.0)
  {
    return getProperty<double>(propname, defval);
  }
 
  bool getBoolProp(const std::string &propname, const bool defval = false)
  {
    return getProperty<bool>(propname, defval);
  }
 
  void setStringProp(const std::string &propname, const std::string val = std::string("None"))
  {
    setProperty<std::string>(propname, val);
  }
 
  void setIntProp(const std::string &propname, const int val = 0)
  {
    setProperty<int>(propname, val);
  }
 
  void setDoubleProp(const std::string &propname, const double val = 0.0)
  {
    setProperty<double>(propname, val);
  }
 
  void setBoolProp(const std::string &propname, const bool val = false)
  {
    setProperty<bool>(propname, val);
  }
 
  template <typename T>
  T getProperty(const std::string &propname, const T defval)
  {
    T ret = defval;
    std::string path = fqpn + "/" + propname;
    try
    {
      ret = tree->access<T>(propname).get();
    }
    catch (std::runtime_error e)
    {
      complain("getProperty Unknown exception -- unknown property", path, e);
    }
    return ret;
  }
 
  template <typename T>
  T getProperty(const std::string &propname)
  {
    T ret;
    std::string path = fqpn + "/" + propname;
    try
    {
      ret = tree->access<T>(propname).get();
    }
    catch (std::runtime_error e)
    {
      complain("getProperty Unknown exception -- unknown property", path, e, false);
    }
    return ret;
  }
 
  template <typename T>
  void setProperty(const std::string &propname, const T val)
  {
    std::string path = fqpn + "/" + propname;
    try
    {
      tree->access<T>(propname).set(val);
    }
    catch (std::runtime_error e)
    {
      complain("setProperty Unknown exception -- unknown property", path, e);
    }
  }
 
private:
  void init(USRPPropTree *ptree, const std::string &path)
  {
    client_name = ptree->client_name;
    try
    {
      tree = ptree->tree->subtree(path);
    }
    catch (std::runtime_error e)
    {
      complain("Exception while creating a subtree", path, e, false);
    }
 
    fqpn = ptree->fqpn + "/" + path;
  }
 
  void complain(const std::string &explain_string,
                std::runtime_error &e,
                bool continue_p = true)
  {
    std::cerr << SoDa::Format("USRPPropTree encountered %0\n\tRequester: %1\n\tException: [%2]\n\t%3\n")
      .addS(explain_string)
      .addS(client_name)
      .addS(e.what())
      .addS((continue_p ? "Thread will continue" : "Thread will terminate"));
    if (!continue_p)
      exit(-1);
  }
 
  void complain(const std::string &explain_string,
                const std::string &path,
                std::runtime_error &e,
                bool continue_p = true)
  {
    std::cerr << SoDa::Format("USRPPropTree encountered %0\n\twhile looking for path [%1]\n\tRequester: %2\n\tException: [%3]\n\t%4\n")
      .addS(explain_string)
      .addS(path)
      .addS(client_name)
      .addS(e.what())
      .addS((continue_p ? "Thread will continue" : "Thread will terminate"));
 
    if (!continue_p)
      exit(-1);
  }
 
  std::string client_name; 
  std::string fqpn;
  uhd::property_tree::sptr tree;
  std::string mb0_name;
};
} // namespace SoDa
#endif