GNU Radio block for interfacing with various radio hardware
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gr-osmosdr/include/osmosdr/pimpl.h

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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_OSMOSDR_PIMPL_H
#define INCLUDED_OSMOSDR_PIMPL_H
#include <memory>
/*! \file pimpl.h
* "Pimpl idiom" (pointer to implementation idiom).
* The OSMOSDR_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: OSMOSDR_PIMPL_DECL(impl) _impl;
* \param _name the name of the pimpl class
*/
#define OSMOSDR_PIMPL_DECL(_name) \
struct _name; std::shared_ptr<_name>
/*!
* Make an instance of a pimpl in a source file.
* - Usage: _impl = OSMOSDR_PIMPL_MAKE(impl, ());
* - Usage: _impl = OSMOSDR_PIMPL_MAKE(impl, (a0, a1));
* \param _name the name of the pimpl class
* \param _args the constructor args for the pimpl
*/
#define OSMOSDR_PIMPL_MAKE(_name, _args) \
std::shared_ptr<_name>(new _name _args)
#endif /* INCLUDED_OSMOSDR_PIMPL_H */