/usr/include/utilspp/singleton/SingletonHolder.hpp is in libcurlpp-dev 0.7.3-6.
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 (c) <2002-2009> <Jean-Philippe Barrette-LaPierre>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (curlpp), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SINGLETON_HOLDER_HPP
#define SINGLETON_HOLDER_HPP
#include <cassert>
#include "CreationUsingNew.hpp"
#include "LifetimeDefault.hpp"
#include "LifetimeWithLongevity.hpp"
#include "../ThreadingSingle.hpp"
namespace utilspp
{
template
<class T,
template <class> class CreationPolicy = utilspp::CreationUsingNew,
template <class> class LifetimePolicy = utilspp::LifetimeDefault,
template <class> class ThreadingModel = utilspp::ThreadingSingle>
class SingletonHolder
{
public:
//the accessor method.
static T & instance();
static void makeInstance();
static void terminate();
protected:
//protected to be sure that nobody may create one by himself.
SingletonHolder();
private:
static void destroySingleton();
private:
typedef typename ThreadingModel<T *>::VolatileType InstanceType;
static InstanceType mInstance;
static bool mDestroyed;
};
}
//#ifdef CURLPP_INCLUDE_TEMPLATE_DEFINITIONS
#include "SingletonHolder.inl"
//#endif
#endif
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