386 lines
20 KiB
C++
386 lines
20 KiB
C++
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// (C) Copyright Pablo Halpern 2009. 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)
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// (C) Copyright Ion Gaztanaga 2011-2012. 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)
|
|
//
|
|
// See http://www.boost.org/libs/container for documentation.
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef BOOST_CONTAINER_ALLOCATOR_ALLOCATOR_TRAITS_HPP
|
|
#define BOOST_CONTAINER_ALLOCATOR_ALLOCATOR_TRAITS_HPP
|
|
|
|
#if (defined _MSC_VER) && (_MSC_VER >= 1200)
|
|
# pragma once
|
|
#endif
|
|
|
|
#include <boost/container/detail/config_begin.hpp>
|
|
#include <boost/container/detail/workaround.hpp>
|
|
#include <boost/intrusive/pointer_traits.hpp>
|
|
#include <boost/intrusive/detail/memory_util.hpp>
|
|
#include <boost/container/detail/memory_util.hpp>
|
|
#include <boost/type_traits/integral_constant.hpp>
|
|
#include <boost/container/detail/mpl.hpp>
|
|
#include <boost/move/utility.hpp>
|
|
#include <limits> //numeric_limits<>::max()
|
|
#include <new> //placement new
|
|
#include <memory> //std::allocator
|
|
#include <boost/container/detail/preprocessor.hpp>
|
|
|
|
///@cond
|
|
|
|
namespace boost {
|
|
namespace container {
|
|
namespace container_detail {
|
|
|
|
//workaround needed for C++03 compilers with no construct()
|
|
//supporting rvalue references
|
|
template<class A>
|
|
struct is_std_allocator
|
|
{ static const bool value = false; };
|
|
|
|
template<class T>
|
|
struct is_std_allocator< std::allocator<T> >
|
|
{ static const bool value = true; };
|
|
|
|
} //namespace container_detail {
|
|
|
|
///@endcond
|
|
|
|
//! The class template allocator_traits supplies a uniform interface to all allocator types.
|
|
//! This class is a C++03-compatible implementation of std::allocator_traits
|
|
template <typename Alloc>
|
|
struct allocator_traits
|
|
{
|
|
//allocator_type
|
|
typedef Alloc allocator_type;
|
|
//value_type
|
|
typedef typename Alloc::value_type value_type;
|
|
|
|
#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
|
|
//! Alloc::pointer if such a type exists; otherwise, value_type*
|
|
//!
|
|
typedef unspecified pointer;
|
|
//! Alloc::const_pointer if such a type exists ; otherwise, pointer_traits<pointer>::rebind<const
|
|
//!
|
|
typedef see_documentation const_pointer;
|
|
//! Non-standard extension
|
|
//! Alloc::reference if such a type exists; otherwise, value_type&
|
|
typedef see_documentation reference;
|
|
//! Non-standard extension
|
|
//! Alloc::const_reference if such a type exists ; otherwise, const value_type&
|
|
typedef see_documentation const_reference;
|
|
//! Alloc::void_pointer if such a type exists ; otherwise, pointer_traits<pointer>::rebind<void>.
|
|
//!
|
|
typedef see_documentation void_pointer;
|
|
//! Alloc::const_void_pointer if such a type exists ; otherwis e, pointer_traits<pointer>::rebind<const
|
|
//!
|
|
typedef see_documentation const_void_pointer;
|
|
//! Alloc::difference_type if such a type exists ; otherwise, pointer_traits<pointer>::difference_type.
|
|
//!
|
|
typedef see_documentation difference_type;
|
|
//! Alloc::size_type if such a type exists ; otherwise, make_unsigned<difference_type>::type
|
|
//!
|
|
typedef see_documentation size_type;
|
|
//! Alloc::propagate_on_container_copy_assignment if such a type exists, otherwise an integral_constant
|
|
//! type with internal constant static member `value` == false.
|
|
typedef see_documentation propagate_on_container_copy_assignment;
|
|
//! Alloc::propagate_on_container_move_assignment if such a type exists, otherwise an integral_constant
|
|
//! type with internal constant static member `value` == false.
|
|
typedef see_documentation propagate_on_container_move_assignment;
|
|
//! Alloc::propagate_on_container_swap if such a type exists, otherwise an integral_constant
|
|
//! type with internal constant static member `value` == false.
|
|
typedef see_documentation propagate_on_container_swap;
|
|
//! Defines an allocator: Alloc::rebind<T>::other if such a type exists; otherwise, Alloc<T, Args>
|
|
//! if Alloc is a class template instantiation of the form Alloc<U, Args>, where Args is zero or
|
|
//! more type arguments ; otherwise, the instantiation of rebind_alloc is ill-formed.
|
|
//!
|
|
//! In C++03 compilers `rebind_alloc` is a struct derived from an allocator
|
|
//! deduced by previously detailed rules.
|
|
template <class T> using rebind_alloc = see_documentation;
|
|
|
|
//! In C++03 compilers `rebind_traits` is a struct derived from
|
|
//! `allocator_traits<OtherAlloc>`, where `OtherAlloc` is
|
|
//! the allocator deduced by rules explained in `rebind_alloc`.
|
|
template <class T> using rebind_traits = allocator_traits<rebind_alloc<T> >;
|
|
|
|
//! Non-standard extension: Portable allocator rebind for C++03 and C++11 compilers.
|
|
//! `type` is an allocator related to Alloc deduced deduced by rules explained in `rebind_alloc`.
|
|
template <class T>
|
|
struct portable_rebind_alloc
|
|
{ typedef see_documentation type; };
|
|
#else
|
|
//pointer
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(boost::container::container_detail::, Alloc,
|
|
pointer, value_type*)
|
|
pointer;
|
|
//const_pointer
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_EVAL_DEFAULT(boost::container::container_detail::, Alloc,
|
|
const_pointer, typename boost::intrusive::pointer_traits<pointer>::template
|
|
rebind_pointer<const value_type>)
|
|
const_pointer;
|
|
//reference
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(boost::container::container_detail::, Alloc,
|
|
reference, typename container_detail::unvoid<value_type>::type&)
|
|
reference;
|
|
//const_reference
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(boost::container::container_detail::, Alloc,
|
|
const_reference, const typename container_detail::unvoid<value_type>::type&)
|
|
const_reference;
|
|
//void_pointer
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_EVAL_DEFAULT(boost::container::container_detail::, Alloc,
|
|
void_pointer, typename boost::intrusive::pointer_traits<pointer>::template
|
|
rebind_pointer<void>)
|
|
void_pointer;
|
|
//const_void_pointer
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_EVAL_DEFAULT(boost::container::container_detail::, Alloc,
|
|
const_void_pointer, typename boost::intrusive::pointer_traits<pointer>::template
|
|
rebind_pointer<const void>)
|
|
const_void_pointer;
|
|
//difference_type
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(boost::container::container_detail::, Alloc,
|
|
difference_type, std::ptrdiff_t)
|
|
difference_type;
|
|
//size_type
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(boost::container::container_detail::, Alloc,
|
|
size_type, std::size_t)
|
|
size_type;
|
|
//propagate_on_container_copy_assignment
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(boost::container::container_detail::, Alloc,
|
|
propagate_on_container_copy_assignment, boost::false_type)
|
|
propagate_on_container_copy_assignment;
|
|
//propagate_on_container_move_assignment
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(boost::container::container_detail::, Alloc,
|
|
propagate_on_container_move_assignment, boost::false_type)
|
|
propagate_on_container_move_assignment;
|
|
//propagate_on_container_swap
|
|
typedef BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(boost::container::container_detail::, Alloc,
|
|
propagate_on_container_swap, boost::false_type)
|
|
propagate_on_container_swap;
|
|
|
|
#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
|
|
//C++11
|
|
template <typename T> using rebind_alloc = typename boost::intrusive::detail::type_rebinder<Alloc, T>::type;
|
|
template <typename T> using rebind_traits = allocator_traits< rebind_alloc<T> >;
|
|
#else // #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
|
|
//Some workaround for C++03 or C++11 compilers with no template aliases
|
|
template <typename T>
|
|
struct rebind_alloc : boost::intrusive::detail::type_rebinder<Alloc,T>::type
|
|
{
|
|
typedef typename boost::intrusive::detail::type_rebinder<Alloc,T>::type Base;
|
|
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
|
|
template <typename... Args>
|
|
rebind_alloc(BOOST_FWD_REF(Args)... args)
|
|
: Base(boost::forward<Args>(args)...)
|
|
{}
|
|
#else // #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
|
|
#define BOOST_PP_LOCAL_MACRO(n) \
|
|
BOOST_PP_EXPR_IF(n, template<) BOOST_PP_ENUM_PARAMS(n, class P) BOOST_PP_EXPR_IF(n, >) \
|
|
rebind_alloc(BOOST_PP_ENUM(n, BOOST_CONTAINER_PP_PARAM_LIST, _)) \
|
|
: Base(BOOST_PP_ENUM(n, BOOST_CONTAINER_PP_PARAM_FORWARD, _)) \
|
|
{} \
|
|
//
|
|
#define BOOST_PP_LOCAL_LIMITS (0, BOOST_CONTAINER_MAX_CONSTRUCTOR_PARAMETERS)
|
|
#include BOOST_PP_LOCAL_ITERATE()
|
|
#endif // #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
|
|
};
|
|
|
|
template <typename T>
|
|
struct rebind_traits
|
|
: allocator_traits<typename boost::intrusive::detail::type_rebinder<Alloc, T>::type>
|
|
{};
|
|
#endif // #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
|
|
template <class T>
|
|
struct portable_rebind_alloc
|
|
{ typedef typename boost::intrusive::detail::type_rebinder<Alloc, T>::type type; };
|
|
#endif //BOOST_CONTAINER_DOXYGEN_INVOKED
|
|
|
|
//! <b>Returns</b>: `a.allocate(n)`
|
|
//!
|
|
static pointer allocate(Alloc &a, size_type n)
|
|
{ return a.allocate(n); }
|
|
|
|
//! <b>Returns</b>: `a.deallocate(p, n)`
|
|
//!
|
|
//! <b>Throws</b>: Nothing
|
|
static void deallocate(Alloc &a, pointer p, size_type n)
|
|
{ return a.deallocate(p, n); }
|
|
|
|
//! <b>Effects</b>: calls `a.allocate(n, p)` if that call is well-formed;
|
|
//! otherwise, invokes `a.allocate(n)`
|
|
static pointer allocate(Alloc &a, size_type n, const_void_pointer p)
|
|
{
|
|
const bool value = boost::container::container_detail::
|
|
has_member_function_callable_with_allocate
|
|
<Alloc, const size_type, const const_void_pointer>::value;
|
|
::boost::integral_constant<bool, value> flag;
|
|
return allocator_traits::priv_allocate(flag, a, n, p);
|
|
}
|
|
|
|
//! <b>Effects</b>: calls `a.destroy(p)` if that call is well-formed;
|
|
//! otherwise, invokes `p->~T()`.
|
|
template<class T>
|
|
static void destroy(Alloc &a, T*p)
|
|
{
|
|
typedef T* destroy_pointer;
|
|
const bool value = boost::container::container_detail::
|
|
has_member_function_callable_with_destroy
|
|
<Alloc, const destroy_pointer>::value;
|
|
::boost::integral_constant<bool, value> flag;
|
|
allocator_traits::priv_destroy(flag, a, p);
|
|
}
|
|
|
|
//! <b>Returns</b>: `a.max_size()` if that expression is well-formed; otherwise,
|
|
//! `numeric_limits<size_type>::max()`.
|
|
static size_type max_size(const Alloc &a)
|
|
{
|
|
const bool value = boost::container::container_detail::
|
|
has_member_function_callable_with_max_size
|
|
<const Alloc>::value;
|
|
::boost::integral_constant<bool, value> flag;
|
|
return allocator_traits::priv_max_size(flag, a);
|
|
}
|
|
|
|
//! <b>Returns</b>: `a.select_on_container_copy_construction()` if that expression is well-formed;
|
|
//! otherwise, a.
|
|
static Alloc select_on_container_copy_construction(const Alloc &a)
|
|
{
|
|
const bool value = boost::container::container_detail::
|
|
has_member_function_callable_with_select_on_container_copy_construction
|
|
<const Alloc>::value;
|
|
::boost::integral_constant<bool, value> flag;
|
|
return allocator_traits::priv_select_on_container_copy_construction(flag, a);
|
|
}
|
|
|
|
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
|
|
//! <b>Effects</b>: calls `a.construct(p, std::forward<Args>(args)...)` if that call is well-formed;
|
|
//! otherwise, invokes `::new (static_cast<void*>(p)) T(std::forward<Args>(args)...)`
|
|
template <class T, class ...Args>
|
|
static void construct(Alloc & a, T* p, BOOST_FWD_REF(Args)... args)
|
|
{
|
|
::boost::integral_constant<bool, container_detail::is_std_allocator<Alloc>::value> flag;
|
|
allocator_traits::priv_construct(flag, a, p, ::boost::forward<Args>(args)...);
|
|
}
|
|
#endif
|
|
///@cond
|
|
#if !defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
|
|
private:
|
|
static pointer priv_allocate(boost::true_type, Alloc &a, size_type n, const_void_pointer p)
|
|
{ return a.allocate(n, p); }
|
|
|
|
static pointer priv_allocate(boost::false_type, Alloc &a, size_type n, const_void_pointer)
|
|
{ return allocator_traits::allocate(a, n); }
|
|
|
|
template<class T>
|
|
static void priv_destroy(boost::true_type, Alloc &a, T* p)
|
|
{ a.destroy(p); }
|
|
|
|
template<class T>
|
|
static void priv_destroy(boost::false_type, Alloc &, T* p)
|
|
{ p->~T(); (void)p; }
|
|
|
|
static size_type priv_max_size(boost::true_type, const Alloc &a)
|
|
{ return a.max_size(); }
|
|
|
|
static size_type priv_max_size(boost::false_type, const Alloc &)
|
|
{ return (std::numeric_limits<size_type>::max)(); }
|
|
|
|
static Alloc priv_select_on_container_copy_construction(boost::true_type, const Alloc &a)
|
|
{ return a.select_on_container_copy_construction(); }
|
|
|
|
static Alloc priv_select_on_container_copy_construction(boost::false_type, const Alloc &a)
|
|
{ return a; }
|
|
|
|
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
|
|
template<class T, class ...Args>
|
|
static void priv_construct(boost::false_type, Alloc &a, T *p, BOOST_FWD_REF(Args) ...args)
|
|
{
|
|
const bool value = boost::container::container_detail::
|
|
has_member_function_callable_with_construct
|
|
< Alloc, T*, Args... >::value;
|
|
::boost::integral_constant<bool, value> flag;
|
|
priv_construct_dispatch2(flag, a, p, ::boost::forward<Args>(args)...);
|
|
}
|
|
|
|
template<class T, class ...Args>
|
|
static void priv_construct(boost::true_type, Alloc &a, T *p, BOOST_FWD_REF(Args) ...args)
|
|
{
|
|
priv_construct_dispatch2(boost::false_type(), a, p, ::boost::forward<Args>(args)...);
|
|
}
|
|
|
|
template<class T, class ...Args>
|
|
static void priv_construct_dispatch2(boost::true_type, Alloc &a, T *p, BOOST_FWD_REF(Args) ...args)
|
|
{ a.construct( p, ::boost::forward<Args>(args)...); }
|
|
|
|
template<class T, class ...Args>
|
|
static void priv_construct_dispatch2(boost::false_type, Alloc &, T *p, BOOST_FWD_REF(Args) ...args)
|
|
{ ::new((void*)p) T(::boost::forward<Args>(args)...); }
|
|
#else // #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
|
|
public:
|
|
#define BOOST_PP_LOCAL_MACRO(n) \
|
|
template<class T BOOST_PP_ENUM_TRAILING_PARAMS(n, class P) > \
|
|
static void construct(Alloc &a, T *p \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_LIST, _)) \
|
|
{ \
|
|
::boost::integral_constant<bool, container_detail::is_std_allocator<Alloc>::value> flag; \
|
|
allocator_traits::priv_construct(flag, a, p \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_FORWARD, _)); \
|
|
} \
|
|
//
|
|
#define BOOST_PP_LOCAL_LIMITS (0, BOOST_CONTAINER_MAX_CONSTRUCTOR_PARAMETERS)
|
|
#include BOOST_PP_LOCAL_ITERATE()
|
|
|
|
private:
|
|
#define BOOST_PP_LOCAL_MACRO(n) \
|
|
template<class T BOOST_PP_ENUM_TRAILING_PARAMS(n, class P) > \
|
|
static void priv_construct(boost::false_type, Alloc &a, T *p \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_LIST,_)) \
|
|
{ \
|
|
const bool value = \
|
|
boost::container::container_detail::has_member_function_callable_with_construct \
|
|
< Alloc, T* BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_FWD_TYPE, _) >::value; \
|
|
::boost::integral_constant<bool, value> flag; \
|
|
priv_construct_dispatch2(flag, a, p \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_FORWARD, _) ); \
|
|
} \
|
|
\
|
|
template<class T BOOST_PP_ENUM_TRAILING_PARAMS(n, class P) > \
|
|
static void priv_construct(boost::true_type, Alloc &a, T *p \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_LIST,_)) \
|
|
{ \
|
|
priv_construct_dispatch2(boost::false_type(), a, p \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_FORWARD, _) ); \
|
|
} \
|
|
\
|
|
template<class T BOOST_PP_ENUM_TRAILING_PARAMS(n, class P) > \
|
|
static void priv_construct_dispatch2(boost::true_type, Alloc &a, T *p \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_LIST,_)) \
|
|
{ a.construct( p BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_FORWARD, _) ); } \
|
|
\
|
|
template<class T BOOST_PP_ENUM_TRAILING_PARAMS(n, class P) > \
|
|
static void priv_construct_dispatch2(boost::false_type, Alloc &, T *p \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_LIST, _) ) \
|
|
{ ::new((void*)p) T(BOOST_PP_ENUM(n, BOOST_CONTAINER_PP_PARAM_FORWARD, _)); } \
|
|
//
|
|
#define BOOST_PP_LOCAL_LIMITS (0, BOOST_CONTAINER_MAX_CONSTRUCTOR_PARAMETERS)
|
|
#include BOOST_PP_LOCAL_ITERATE()
|
|
#endif // #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
|
|
#endif //#if defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
|
|
|
|
///@endcond
|
|
};
|
|
|
|
} //namespace container {
|
|
} //namespace boost {
|
|
|
|
#include <boost/container/detail/config_end.hpp>
|
|
|
|
#endif // ! defined(BOOST_CONTAINER_ALLOCATOR_ALLOCATOR_TRAITS_HPP)
|