/usr/include/spatialindex/tools/PointerPool.h is in libspatialindex-dev 1.8.5-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Project: libspatialindex - A C++ library for spatial indexing
* Author: Marios Hadjieleftheriou, mhadji@gmail.com
******************************************************************************
* Copyright (c) 2004, Marios Hadjieleftheriou
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* 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.
******************************************************************************/
#pragma once
#include "PoolPointer.h"
namespace Tools
{
template <class X> class PointerPool
{
public:
explicit PointerPool(uint32_t capacity) : m_capacity(capacity)
{
#ifndef NDEBUG
m_hits = 0;
m_misses = 0;
m_pointerCount = 0;
#endif
}
~PointerPool()
{
assert(m_pool.size() <= m_capacity);
while (! m_pool.empty())
{
X* x = m_pool.top(); m_pool.pop();
#ifndef NDEBUG
--m_pointerCount;
#endif
delete x;
}
#ifndef NDEBUG
std::cerr << "Lost pointers: " << m_pointerCount << std::endl;
#endif
}
PoolPointer<X> acquire()
{
X* p = 0;
if (! m_pool.empty())
{
p = m_pool.top(); m_pool.pop();
#ifndef NDEBUG
m_hits++;
#endif
}
else
{
p = new X();
#ifndef NDEBUG
m_pointerCount++;
m_misses++;
#endif
}
return PoolPointer<X>(p, this);
}
void release(X* p)
{
if (m_pool.size() < m_capacity)
{
m_pool.push(p);
}
else
{
#ifndef NDEBUG
--m_pointerCount;
#endif
delete p;
}
assert(m_pool.size() <= m_capacity);
}
uint32_t getCapacity() const { return m_capacity; }
void setCapacity(uint32_t c)
{
assert (c >= 0);
m_capacity = c;
}
private:
uint32_t m_capacity;
std::stack<X*> m_pool;
#ifndef NDEBUG
public:
uint64_t m_hits;
uint64_t m_misses;
uint64_t m_pointerCount;
#endif
};
}
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