64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
#ifndef BOOST_SMART_PTR_DETAIL_QUICK_ALLOCATOR_HPP_INCLUDED
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#define BOOST_SMART_PTR_DETAIL_QUICK_ALLOCATOR_HPP_INCLUDED
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// Copyright 2003 David Abrahams
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// Copyright 2003, 2025 Peter Dimov
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#include <boost/config/header_deprecated.hpp>
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#include <memory>
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#include <cstddef>
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BOOST_HEADER_DEPRECATED("std::allocator or std::pmr::synchronized_pool_resource")
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namespace boost
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{
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namespace detail
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{
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template<class T> struct quick_allocator
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{
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static void* alloc()
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{
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return std::allocator<T>().allocate( 1 );
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}
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static void* alloc( std::size_t n )
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{
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if( n != sizeof(T) ) // class-specific delete called for a derived object
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{
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return ::operator new( n );
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}
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else
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{
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return alloc();
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}
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}
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static void dealloc( void* p )
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{
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if( p != 0 ) // 18.4.1.1/13
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{
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std::allocator<T>().deallocate( static_cast<T*>( p ), 1 );
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}
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}
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static void dealloc( void* p, std::size_t n )
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{
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if( n != sizeof(T) ) // class-specific delete called for a derived object
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{
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::operator delete( p );
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}
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else
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{
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dealloc( p );
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}
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}
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};
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} // namespace detail
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} // namespace boost
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#endif // #ifndef BOOST_SMART_PTR_DETAIL_QUICK_ALLOCATOR_HPP_INCLUDED
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