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// static pool class
// Copyright (C) 2009 Tim Blechmann
//
// 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 2 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; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
#ifndef UTILITIES_STATIC_POOL_HPP
#define UTILITIES_STATIC_POOL_HPP
extern "C"
{
#include "tlsf.h"
}
#include <array>
#include <boost/noncopyable.hpp>
#include <boost/static_assert.hpp>
#include <boost/mpl/arithmetic.hpp>
#include <boost/mpl/modulus.hpp>
#include "nova-tt/spin_lock.hpp"
#include "nova-tt/dummy_mutex.hpp"
#include "nova-tt/mlock.hpp"
namespace nova {
template <std::size_t bytes,
bool blocking = false>
class static_pool:
boost::noncopyable
{
BOOST_STATIC_ASSERT((boost::mpl::modulus<boost::mpl::int_<bytes>, boost::mpl::int_<sizeof(long)> >::value == 0));
static const std::size_t poolsize = bytes/sizeof(long);
typedef typename boost::mpl::if_c<blocking,
spin_lock,
dummy_mutex>::type mutex_type;
typedef typename mutex_type::scoped_lock scoped_lock;
struct data:
mutex_type
{
std::array<long, poolsize> pool;
};
void lock_memory(void)
{
mlock(data_.pool.data(), poolsize * sizeof(long));
}
public:
static_pool(bool lock = false) throw()
{
/* first lock, then assign */
if (lock)
lock_memory();
data_.pool.fill(0);
std::size_t status = init_memory_pool(bytes, data_.pool.begin());
assert(status > 0);
}
~static_pool() throw()
{
scoped_lock lock(data_);
destroy_memory_pool(data_.pool.begin());
}
void * malloc(std::size_t size)
{
scoped_lock lock(data_);
return malloc_ex(size, data_.pool.begin());
}
void free(void * p)
{
scoped_lock lock(data_);
free_ex(p, data_.pool.begin());
}
std::size_t get_max_size(void)
{
return ::get_max_size(data_.pool.begin());
}
private:
data data_;
};
} /* namespace nova */
#endif /* UTILITIES_STATIC_POOL_HPP */
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