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

#ifndef BOOST_CORE_MEMORY_RESOURCE_HPP_INCLUDED
#define BOOST_CORE_MEMORY_RESOURCE_HPP_INCLUDED

// MS compatible compilers support #pragma once

#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif

//  Copyright 2023 Peter Dimov
//  Distributed under the Boost Software License, Version 1.0.
//  https://www.boost.org/LICENSE_1_0.txt

#include <boost/core/max_align.hpp>
#include <boost/config.hpp>
#include <boost/config/workaround.hpp>
#include <cstddef>

// Define our own placement new to avoid the inclusion of <new>
// (~9K extra lines) at Ion Gaztanhaga's request.
//
// We can use our own because [intro.object] p13 says:
//
// Any implicit or explicit invocation of a function named `operator new`
// or `operator new[]` implicitly creates objects in the returned region of
// storage and returns a pointer to a suitable created object.

namespace boost
{
namespace core
{
namespace detail
{

struct placement_new_tag {};

} // namespace detail
} // namespace core
} // namespace boost

inline void* operator new( std::size_t, void* p, boost::core::detail::placement_new_tag )
{
    return p;
}

inline void operator delete( void*, void*, boost::core::detail::placement_new_tag )
{
}

namespace boost
{
namespace core
{

class memory_resource
{
public:

#if defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || BOOST_WORKAROUND(BOOST_GCC, < 40700)

virtual ~memory_resource() {}

#else

virtual ~memory_resource() = default;

#endif

BOOST_ATTRIBUTE_NODISCARD void* allocate( std::size_t bytes, std::size_t alignment = max_align )
    {
        // https://github.com/boostorg/container/issues/199
        // https://cplusplus.github.io/LWG/issue3471

return ::operator new( bytes, do_allocate( bytes, alignment ), core::detail::placement_new_tag() );
    }

void deallocate( void* p, std::size_t bytes, std::size_t alignment = max_align )
    {
        do_deallocate( p, bytes, alignment );
    }

bool is_equal( memory_resource const & other ) const BOOST_NOEXCEPT
    {
        return do_is_equal( other );
    }

private:

virtual void* do_allocate( std::size_t bytes, std::size_t alignment ) = 0;
    virtual void do_deallocate( void* p, std::size_t bytes, std::size_t alignment ) = 0;

virtual bool do_is_equal( memory_resource const & other ) const BOOST_NOEXCEPT = 0;
};

inline bool operator==( memory_resource const& a, memory_resource const& b ) BOOST_NOEXCEPT
{
    return &a == &b || a.is_equal( b );
}

inline bool operator!=( memory_resource const& a, memory_resource const& b ) BOOST_NOEXCEPT
{
    return !( a == b );
}

} // namespace core
} // namespace boost

#endif  // #ifndef BOOST_CORE_MEMORY_RESOURCE_HPP_INCLUDED

[-] 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]