/usr/include/uhd/property_tree.ipp is in libuhd-dev 3.10.3.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Copyright 2011,2014-2016 Ettus Research
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#ifndef INCLUDED_UHD_PROPERTY_TREE_IPP
#define INCLUDED_UHD_PROPERTY_TREE_IPP
#include <uhd/exception.hpp>
#include <boost/foreach.hpp>
#include <boost/scoped_ptr.hpp>
#include <vector>
/***********************************************************************
* Implement templated property impl
**********************************************************************/
namespace uhd{ namespace /*anon*/{
template <typename T> class property_impl : public property<T>{
public:
property_impl<T>(property_tree::coerce_mode_t mode) : _coerce_mode(mode){
if (_coerce_mode == property_tree::AUTO_COERCE) {
_coercer = DEFAULT_COERCER;
}
}
~property_impl<T>(void){
/* NOP */
}
property<T> &set_coercer(const typename property<T>::coercer_type &coercer){
if (not _coercer.empty()) uhd::assertion_error("cannot register more than one coercer for a property");
if (_coerce_mode == property_tree::MANUAL_COERCE) uhd::assertion_error("cannot register coercer for a manually coerced property");
_coercer = coercer;
return *this;
}
property<T> &set_publisher(const typename property<T>::publisher_type &publisher){
if (not _publisher.empty()) uhd::assertion_error("cannot register more than one publisher for a property");
_publisher = publisher;
return *this;
}
property<T> &add_desired_subscriber(const typename property<T>::subscriber_type &subscriber){
_desired_subscribers.push_back(subscriber);
return *this;
}
property<T> &add_coerced_subscriber(const typename property<T>::subscriber_type &subscriber){
_coerced_subscribers.push_back(subscriber);
return *this;
}
property<T> &update(void){
this->set(this->get());
return *this;
}
void _set_coerced(const T &value){
init_or_set_value(_coerced_value, value);
BOOST_FOREACH(typename property<T>::subscriber_type &csub, _coerced_subscribers){
csub(get_value_ref(_coerced_value)); //let errors propagate
}
}
property<T> &set(const T &value){
init_or_set_value(_value, value);
BOOST_FOREACH(typename property<T>::subscriber_type &dsub, _desired_subscribers){
dsub(get_value_ref(_value)); //let errors propagate
}
if (not _coercer.empty()) {
_set_coerced(_coercer(get_value_ref(_value)));
} else {
if (_coerce_mode == property_tree::AUTO_COERCE) uhd::assertion_error("coercer missing for an auto coerced property");
}
return *this;
}
property<T> &set_coerced(const T &value){
if (_coerce_mode == property_tree::AUTO_COERCE) uhd::assertion_error("cannot set coerced value an auto coerced property");
_set_coerced(value);
return *this;
}
const T get(void) const{
if (empty()) {
throw uhd::runtime_error("Cannot get() on an uninitialized (empty) property");
}
if (not _publisher.empty()) {
return _publisher();
} else {
if (_coerced_value.get() == NULL and _coerce_mode == property_tree::MANUAL_COERCE)
throw uhd::runtime_error("uninitialized coerced value for manually coerced attribute");
return get_value_ref(_coerced_value);
}
}
const T get_desired(void) const{
if (_value.get() == NULL) throw uhd::runtime_error("Cannot get_desired() on an uninitialized (empty) property");
return get_value_ref(_value);
}
bool empty(void) const{
return _publisher.empty() and _value.get() == NULL;
}
private:
static T DEFAULT_COERCER(const T& value) {
return value;
}
static void init_or_set_value(boost::scoped_ptr<T>& scoped_value, const T& init_val) {
if (scoped_value.get() == NULL) {
scoped_value.reset(new T(init_val));
} else {
*scoped_value = init_val;
}
}
static const T& get_value_ref(const boost::scoped_ptr<T>& scoped_value) {
if (scoped_value.get() == NULL) throw uhd::assertion_error("Cannot use uninitialized property data");
return *scoped_value.get();
}
const property_tree::coerce_mode_t _coerce_mode;
std::vector<typename property<T>::subscriber_type> _desired_subscribers;
std::vector<typename property<T>::subscriber_type> _coerced_subscribers;
typename property<T>::publisher_type _publisher;
typename property<T>::coercer_type _coercer;
boost::scoped_ptr<T> _value;
boost::scoped_ptr<T> _coerced_value;
};
}} //namespace uhd::/*anon*/
/***********************************************************************
* Implement templated methods for the property tree
**********************************************************************/
namespace uhd{
template <typename T> property<T> &property_tree::create(const fs_path &path, coerce_mode_t coerce_mode){
this->_create(path, typename boost::shared_ptr<property<T> >(new property_impl<T>(coerce_mode)));
return this->access<T>(path);
}
template <typename T> property<T> &property_tree::access(const fs_path &path){
return *boost::static_pointer_cast<property<T> >(this->_access(path));
}
} //namespace uhd
#endif /* INCLUDED_UHD_PROPERTY_TREE_IPP */
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