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PATH: opt / cpanel / ea-ruby27 / src / passenger-release-6.1.2 / src / cxx_supportlib / vendor-modified / boost / core

/*
Copyright 2019 Glen Joseph Fernandes
(glenjofe@gmail.com)

Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_CORE_DEFAULT_ALLOCATOR_HPP
#define BOOST_CORE_DEFAULT_ALLOCATOR_HPP

#include <boost/config.hpp>
#include <new>
#include <cstddef>

namespace boost {

#if defined(BOOST_NO_EXCEPTIONS)
BOOST_NORETURN void throw_exception(const std::exception&);
#endif

namespace default_ {

template<bool V>
struct bool_constant {
    typedef bool value_type;
    typedef bool_constant type;

static const bool value = V;

operator bool() const BOOST_NOEXCEPT {
        return V;
    }

bool operator()() const BOOST_NOEXCEPT {
        return V;
    }
};

template<bool V>
const bool bool_constant<V>::value;

template<class T>
struct add_reference {
    typedef T& type;
};

template<>
struct add_reference<void> {
    typedef void type;
};

template<>
struct add_reference<const void> {
    typedef const void type;
};

template<class T>
struct default_allocator {
    typedef T value_type;
    typedef T* pointer;
    typedef const T* const_pointer;
    typedef typename add_reference<T>::type reference;
    typedef typename add_reference<const T>::type const_reference;
    typedef std::size_t size_type;
    typedef std::ptrdiff_t difference_type;
    typedef bool_constant<true> propagate_on_container_move_assignment;
    typedef bool_constant<true> is_always_equal;

template<class U>
    struct rebind {
        typedef default_allocator<U> other;
    };

#if !defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS)
    default_allocator() = default;
#else
    BOOST_CONSTEXPR default_allocator() BOOST_NOEXCEPT { }
#endif

template<class U>
    BOOST_CONSTEXPR default_allocator(const default_allocator<U>&)
        BOOST_NOEXCEPT { }

BOOST_CONSTEXPR std::size_t max_size() const BOOST_NOEXCEPT {
        return static_cast<std::size_t>(-1) / (2 < sizeof(T) ? sizeof(T) : 2);
    }

#if !defined(BOOST_NO_EXCEPTIONS)
    T* allocate(std::size_t n) {
        if (n > max_size()) {
            throw std::bad_alloc();
        }
        return static_cast<T*>(::operator new(sizeof(T) * n));
    }

void deallocate(T* p, std::size_t) {
        ::operator delete(p);
    }
#else
    T* allocate(std::size_t n) {
        if (n > max_size()) {
            boost::throw_exception(std::bad_alloc());
        }
        void* p = ::operator new(sizeof(T) * n, std::nothrow);
        if (!p) {
            boost::throw_exception(std::bad_alloc());
        }
        return static_cast<T*>(p);
    }

void deallocate(T* p, std::size_t) {
        ::operator delete(p, std::nothrow);
    }
#endif

#if defined(BOOST_NO_CXX11_ALLOCATOR)
    T* allocate(std::size_t n, const void*) {
        return allocate(n);
    }
#endif

#if (defined(BOOST_LIBSTDCXX_VERSION) && BOOST_LIBSTDCXX_VERSION < 60000) || \
    defined(BOOST_NO_CXX11_ALLOCATOR)
    template<class U, class V>
    void construct(U* p, const V& v) {
        ::new(p) U(v);
    }

template<class U>
    void destroy(U* p) {
        p->~U();
        (void)p;
    }
#endif
};

template<class T, class U>
BOOST_CONSTEXPR inline bool
operator==(const default_allocator<T>&,
    const default_allocator<U>&) BOOST_NOEXCEPT
{
    return true;
}

template<class T, class U>
BOOST_CONSTEXPR inline bool
operator!=(const default_allocator<T>&,
    const default_allocator<U>&) BOOST_NOEXCEPT
{
    return false;
}

} /* default_ */

using default_::default_allocator;

} /* boost */

#endif

[-] ref.hpp [edit]
[-] default_allocator.hpp [edit]
[-] allocator_access.hpp [edit]
[-] no_exceptions_support.hpp [edit]
[-] uncaught_exceptions.hpp [edit]
[-] invoke_swap.hpp [edit]
[-] quick_exit.hpp [edit]
[-] launder.hpp [edit]
[-] swap.hpp [edit]
[-] enable_if.hpp [edit]
[-] first_scalar.hpp [edit]
[-] memory_resource.hpp [edit]
[-] make_span.hpp [edit]
[-] scoped_enum.hpp [edit]
[-] exchange.hpp [edit]
[-] cmath.hpp [edit]
[-] lightweight_test_trait.hpp [edit]
[-] max_align.hpp [edit]
[-] demangle.hpp [edit]
[-] noinit_adaptor.hpp [edit]
[-] empty_value.hpp [edit]
[+] ..
[-] underlying_type.hpp [edit]
[-] null_deleter.hpp [edit]
[-] data.hpp [edit]
[-] allocator_traits.hpp [edit]
[-] is_same.hpp [edit]
[-] verbose_terminate_handler.hpp [edit]
[-] fclose_deleter.hpp [edit]
[-] span.hpp [edit]
[-] lightweight_test.hpp [edit]
[-] use_default.hpp [edit]
[-] alignof.hpp [edit]
[-] size.hpp [edit]
[-] checked_delete.hpp [edit]
[-] typeinfo.hpp [edit]
[-] nvp.hpp [edit]
[-] serialization.hpp [edit]
[-] snprintf.hpp [edit]
[-] type_name.hpp [edit]
[-] addressof.hpp [edit]
[-] explicit_operator_bool.hpp [edit]
[-] yield_primitives.hpp [edit]
[-] pointer_in_range.hpp [edit]
[+] detail
[-] pointer_traits.hpp [edit]
[-] identity.hpp [edit]
[-] alloc_construct.hpp [edit]
[-] ignore_unused.hpp [edit]
[-] bit.hpp [edit]
[-] noncopyable.hpp [edit]
[-] functor.hpp [edit]