/usr/include/uhd/utils/pimpl.hpp is in libuhd-dev 3.7.3-1.
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 2010 Ettus Research LLC
//
// 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_UTILS_PIMPL_HPP
#define INCLUDED_UHD_UTILS_PIMPL_HPP
#include <uhd/config.hpp>
#include <boost/shared_ptr.hpp>
/*! \file pimpl.hpp
* "Pimpl idiom" (pointer to implementation idiom).
* The UHD_PIMPL_* macros simplify code overhead for declaring and making pimpls.
*
* Each pimpl is implemented as a shared pointer to the implementation:
* - The container class will not have to deallocate the pimpl.
* - The container class will use the pimpl as a regular pointer.
* - Usage: _impl->method(arg0, arg1)
* - Usage: _impl->member = value;
*
* \see http://en.wikipedia.org/wiki/Opaque_pointer
*/
/*!
* Make a declaration for a pimpl in a header file.
* - Usage: UHD_PIMPL_DECL(impl) _impl;
* \param _name the name of the pimpl class
*/
#define UHD_PIMPL_DECL(_name) \
struct _name; boost::shared_ptr<_name>
/*!
* Make an instance of a pimpl in a source file.
* - Usage: _impl = UHD_PIMPL_MAKE(impl, ());
* - Usage: _impl = UHD_PIMPL_MAKE(impl, (a0, a1));
* \param _name the name of the pimpl class
* \param _args the constructor args for the pimpl
*/
#define UHD_PIMPL_MAKE(_name, _args) \
boost::shared_ptr<_name>(new _name _args)
#endif /* INCLUDED_UHD_UTILS_PIMPL_HPP */
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