53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
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//
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// allocator.hpp
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// ~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ALLOCATOR_HPP
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#define ALLOCATOR_HPP
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#include <boost/aligned_storage.hpp>
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// Represents a single connection from a client.
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class allocator
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{
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public:
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allocator()
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: in_use_(false)
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{
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}
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void* allocate(std::size_t n)
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{
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if (in_use_ || n >= 1024)
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return ::operator new(n);
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in_use_ = true;
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return static_cast<void*>(&space_);
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}
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void deallocate(void* p)
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{
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if (p != static_cast<void*>(&space_))
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::operator delete(p);
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else
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in_use_ = false;
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}
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private:
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allocator(const allocator&);
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allocator& operator=(const allocator&);
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// Whether the reusable memory space is currently in use.
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bool in_use_;
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// The reusable memory space made available by the allocator.
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boost::aligned_storage<1024>::type space_;
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};
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#endif // ALLOCATOR_HPP
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