/usr/include/utilspp/singleton/SingletonHolder.inl is in libcurlpp-dev 0.7.3-6.
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* Copyright (c) <2002-2005> <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_INL
#define SINGLETON_HOLDER_INL
template
<
class T,
template <class> class CreationPolicy,
template <class> class LifetimePolicy,
template <class> class ThreadingModel
>
T&
utilspp::SingletonHolder
<
T,
CreationPolicy,
LifetimePolicy,
ThreadingModel
>
::instance()
{
if (mInstance == NULL)
{
makeInstance();
}
return (*mInstance);
};
template
<
class T,
template <class> class CreationPolicy,
template <class> class LifetimePolicy,
template <class> class ThreadingModel
>
void
utilspp::SingletonHolder
<
T,
CreationPolicy,
LifetimePolicy,
ThreadingModel
>::makeInstance()
{
if (mInstance == NULL)
{
typename ThreadingModel<T>::lock guard;
(void)guard;
if (mInstance == NULL) {
if (mDestroyed)
{
LifetimePolicy<T>::onDeadReference();
mDestroyed = false;
}
mInstance = CreationPolicy<T>::create();
LifetimePolicy<T>::scheduleDestruction(mInstance, & destroySingleton);
}
}
}
template
<
class T,
template <class> class CreationPolicy,
template <class> class LifetimePolicy,
template <class> class ThreadingModel
>
void
utilspp::SingletonHolder
<
T,
CreationPolicy,
LifetimePolicy,
ThreadingModel
>
::destroySingleton()
{
assert(!mDestroyed);
CreationPolicy<T>::destroy(mInstance);
mInstance = NULL;
mDestroyed = true;
}
template <class T,
template <class> class C,
template <class> class L,
template <class> class M
>
typename utilspp::SingletonHolder<T, C, L, M>::InstanceType
utilspp::SingletonHolder<T, C, L, M>::mInstance;
template
<
class T,
template <class> class C,
template <class> class L,
template <class> class M
>
bool utilspp::SingletonHolder<T, C, L, M>::mDestroyed;
#endif
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