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