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// Copyright (c) 2023 Klemens D. Morgenstern
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_SQLITE_MEMORY_HPP
#define BOOST_SQLITE_MEMORY_HPP
#include <boost/sqlite/detail/config.hpp>
#include <memory>
BOOST_SQLITE_BEGIN_NAMESPACE
/// A tag to allow `operator new`
/// @ingroup reference
struct memory_tag {};
BOOST_SQLITE_END_NAMESPACE
inline void *operator new ( std::size_t size, boost::sqlite::memory_tag) noexcept
{
using namespace boost::sqlite;
return sqlite3_malloc64(size);
}
inline void *operator new[]( std::size_t size, boost::sqlite::memory_tag) noexcept
{
using namespace boost::sqlite;
return sqlite3_malloc64(size);
}
inline void operator delete ( void* ptr, boost::sqlite::memory_tag) noexcept
{
using namespace boost::sqlite;
return sqlite3_free(ptr);
}
BOOST_SQLITE_BEGIN_NAMESPACE
template<typename T>
void delete_(T * t)
{
struct scoped_free
{
void * p;
~scoped_free()
{
sqlite3_free(p);
}
};
scoped_free _{t};
t->~T();
}
namespace detail
{
template<typename T>
struct deleter
{
void operator()(T* t)
{
delete_(t);
}
};
template<typename T>
struct deleter<T[]>
{
static_assert(std::is_trivially_destructible<T>::value, "T[] needs to be trivially destructible");
void operator()(T* t)
{
sqlite3_free(t);
}
};
template<>
struct deleter<void>
{
void operator()(void* t)
{
sqlite3_free(t);
}
};
}
template<typename T>
using unique_ptr = std::unique_ptr<T, detail::deleter<T>>;
template<typename T>
inline std::size_t msize(const unique_ptr<T> & ptr)
{
return sqlite3_msize(ptr.get());
}
template<typename T, typename ... Args>
unique_ptr<T> make_unique(Args && ... args)
{
unique_ptr<void> up{sqlite3_malloc64(sizeof(T))};
unique_ptr<T> res{new (up.get()) T(std::forward<Args>(args)...)};
up.release();
return res;
}
BOOST_SQLITE_END_NAMESPACE
#endif //BOOST_SQLITE_MEMORY_HPP
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