mirror of
https://github.com/matrix-construct/construct
synced 2024-11-14 14:01:08 +01:00
162 lines
3.2 KiB
C++
162 lines
3.2 KiB
C++
// The Construct
|
|
//
|
|
// Copyright (C) The Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_SPIRIT_BOOST_FUNCTION_H
|
|
|
|
#if !defined(__clang__)
|
|
#pragma GCC visibility push (internal)
|
|
namespace boost::spirit
|
|
{
|
|
// Spirit uses `boost::function` by default, but since it's in boost:: it
|
|
// simply declares as `function`. We can do a lot better by dropping in
|
|
// `std::function` instead.
|
|
using std::function;
|
|
}
|
|
#pragma GCC visibility pop
|
|
#endif
|
|
|
|
#if defined(__clang__)
|
|
#pragma GCC visibility push (internal)
|
|
namespace boost::spirit
|
|
{
|
|
template<class prototype>
|
|
struct function;
|
|
|
|
template<class R,
|
|
class... args>
|
|
struct function<R (args...)>;
|
|
}
|
|
|
|
template<class R,
|
|
class... args>
|
|
class [[clang::internal_linkage]]
|
|
boost::spirit::function<R (args...)>
|
|
{
|
|
size_t s
|
|
{
|
|
0UL
|
|
};
|
|
|
|
R (*f)(const void *const &, args...)
|
|
{
|
|
nullptr
|
|
};
|
|
|
|
std::unique_ptr<char, decltype(&std::free)> o
|
|
{
|
|
nullptr, std::free
|
|
};
|
|
|
|
public:
|
|
explicit operator bool() const noexcept
|
|
{
|
|
assert(f);
|
|
assert(o);
|
|
return true;
|
|
}
|
|
|
|
decltype(auto) operator()(args&&...) const;
|
|
decltype(auto) operator()(args&&...);
|
|
|
|
template<class binder>
|
|
[[clang::internal_linkage]]
|
|
function &operator=(binder) noexcept;
|
|
|
|
function() = default;
|
|
function(const function &);
|
|
function(function &&) noexcept = default;
|
|
~function() noexcept = default;
|
|
};
|
|
|
|
template<class R,
|
|
class... args>
|
|
boost::spirit::function<R (args...)>::function(const function &o)
|
|
:s{o.s}
|
|
,f{o.f}
|
|
,o
|
|
{
|
|
this->s?
|
|
ircd::aligned_alloc(64, this->s):
|
|
std::unique_ptr<char, decltype(&std::free)>
|
|
{
|
|
nullptr, std::free
|
|
}
|
|
}
|
|
{
|
|
memcpy(this->o.get(), o.o.get(), this->s);
|
|
}
|
|
|
|
template<class R,
|
|
class... args>
|
|
template<class binder>
|
|
[[clang::reinitializes]]
|
|
boost::spirit::function<R (args...)> &
|
|
boost::spirit::function<R (args...)>::operator=(binder o)
|
|
noexcept
|
|
{
|
|
constexpr auto alignment
|
|
{
|
|
std::max(std::alignment_of<binder>::value, 64UL)
|
|
};
|
|
|
|
this->s = sizeof(binder);
|
|
this->o = ircd::aligned_alloc(alignment, this->s);
|
|
this->f = [](const void *const &o, args&&... a)
|
|
{
|
|
const auto &object
|
|
{
|
|
*reinterpret_cast<const binder *>(o)
|
|
};
|
|
|
|
return object(std::forward<args>(a)...);
|
|
};
|
|
|
|
new (this->o.get()) binder
|
|
{
|
|
std::move(o)
|
|
};
|
|
|
|
return *this;
|
|
}
|
|
|
|
template<class R,
|
|
class... args>
|
|
[[gnu::always_inline, gnu::artificial]]
|
|
inline decltype(auto)
|
|
boost::spirit::function<R (args...)>::operator()(args&&... a)
|
|
{
|
|
assert(bool(*this));
|
|
const auto o
|
|
{
|
|
std::addressof(*this->o)
|
|
};
|
|
|
|
return this->f(o, std::forward<args>(a)...);
|
|
}
|
|
|
|
template<class R,
|
|
class... args>
|
|
[[gnu::always_inline, gnu::artificial]]
|
|
inline decltype(auto)
|
|
boost::spirit::function<R (args...)>::operator()(args&&... a)
|
|
const
|
|
{
|
|
assert(bool(*this));
|
|
const auto o
|
|
{
|
|
std::addressof(*this->o)
|
|
};
|
|
|
|
return this->f(o, std::forward<args>(a)...);
|
|
}
|
|
|
|
#pragma GCC visibility pop
|
|
#endif
|