boost/asio/execution/blocking_adaptation.hpp
//
// execution/blocking_adaptation.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2024 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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)
//
#ifndef BOOST_ASIO_EXECUTION_BLOCKING_ADAPTATION_HPP
#define BOOST_ASIO_EXECUTION_BLOCKING_ADAPTATION_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#include <boost/asio/detail/event.hpp>
#include <boost/asio/detail/mutex.hpp>
#include <boost/asio/detail/type_traits.hpp>
#include <boost/asio/execution/executor.hpp>
#include <boost/asio/is_applicable_property.hpp>
#include <boost/asio/prefer.hpp>
#include <boost/asio/query.hpp>
#include <boost/asio/require.hpp>
#include <boost/asio/traits/prefer_member.hpp>
#include <boost/asio/traits/query_free.hpp>
#include <boost/asio/traits/query_member.hpp>
#include <boost/asio/traits/query_static_constexpr_member.hpp>
#include <boost/asio/traits/require_member.hpp>
#include <boost/asio/traits/static_query.hpp>
#include <boost/asio/traits/static_require.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
#if defined(GENERATING_DOCUMENTATION)
namespace execution {
/// A property to describe whether automatic adaptation of an executor is
/// allowed in order to apply the blocking_adaptation_t::allowed_t property.
struct blocking_adaptation_t
{
/// The blocking_adaptation_t property applies to executors.
template <typename T>
static constexpr bool is_applicable_property_v = is_executor_v<T>;
/// The top-level blocking_adaptation_t property cannot be required.
static constexpr bool is_requirable = false;
/// The top-level blocking_adaptation_t property cannot be preferred.
static constexpr bool is_preferable = false;
/// The type returned by queries against an @c any_executor.
typedef blocking_adaptation_t polymorphic_query_result_type;
/// A sub-property that indicates that automatic adaptation is not allowed.
struct disallowed_t
{
/// The blocking_adaptation_t::disallowed_t property applies to executors.
template <typename T>
static constexpr bool is_applicable_property_v = is_executor_v<T>;
/// The blocking_adaptation_t::disallowed_t property can be required.
static constexpr bool is_requirable = true;
/// The blocking_adaptation_t::disallowed_t property can be preferred.
static constexpr bool is_preferable = true;
/// The type returned by queries against an @c any_executor.
typedef blocking_adaptation_t polymorphic_query_result_type;
/// Default constructor.
constexpr disallowed_t();
/// Get the value associated with a property object.
/**
* @returns disallowed_t();
*/
static constexpr blocking_adaptation_t value();
};
/// A sub-property that indicates that automatic adaptation is allowed.
struct allowed_t
{
/// The blocking_adaptation_t::allowed_t property applies to executors.
template <typename T>
static constexpr bool is_applicable_property_v = is_executor_v<T>;
/// The blocking_adaptation_t::allowed_t property can be required.
static constexpr bool is_requirable = true;
/// The blocking_adaptation_t::allowed_t property can be preferred.
static constexpr bool is_preferable = false;
/// The type returned by queries against an @c any_executor.
typedef blocking_adaptation_t polymorphic_query_result_type;
/// Default constructor.
constexpr allowed_t();
/// Get the value associated with a property object.
/**
* @returns allowed_t();
*/
static constexpr blocking_adaptation_t value();
};
/// A special value used for accessing the blocking_adaptation_t::disallowed_t
/// property.
static constexpr disallowed_t disallowed;
/// A special value used for accessing the blocking_adaptation_t::allowed_t
/// property.
static constexpr allowed_t allowed;
/// Default constructor.
constexpr blocking_adaptation_t();
/// Construct from a sub-property value.
constexpr blocking_adaptation_t(disallowed_t);
/// Construct from a sub-property value.
constexpr blocking_adaptation_t(allowed_t);
/// Compare property values for equality.
friend constexpr bool operator==(
const blocking_adaptation_t& a, const blocking_adaptation_t& b) noexcept;
/// Compare property values for inequality.
friend constexpr bool operator!=(
const blocking_adaptation_t& a, const blocking_adaptation_t& b) noexcept;
};
/// A special value used for accessing the blocking_adaptation_t property.
constexpr blocking_adaptation_t blocking_adaptation;
} // namespace execution
#else // defined(GENERATING_DOCUMENTATION)
namespace execution {
namespace detail {
namespace blocking_adaptation {
template <int I> struct disallowed_t;
template <int I> struct allowed_t;
} // namespace blocking_adaptation
template <int I = 0>
struct blocking_adaptation_t
{
#if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T>
static constexpr bool is_applicable_property_v = is_executor<T>::value;
#endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
static constexpr bool is_requirable = false;
static constexpr bool is_preferable = false;
typedef blocking_adaptation_t polymorphic_query_result_type;
typedef detail::blocking_adaptation::disallowed_t<I> disallowed_t;
typedef detail::blocking_adaptation::allowed_t<I> allowed_t;
constexpr blocking_adaptation_t()
: value_(-1)
{
}
constexpr blocking_adaptation_t(disallowed_t)
: value_(0)
{
}
constexpr blocking_adaptation_t(allowed_t)
: value_(1)
{
}
template <typename T>
struct proxy
{
#if defined(BOOST_ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
struct type
{
template <typename P>
auto query(P&& p) const
noexcept(
noexcept(
declval<conditional_t<true, T, P>>().query(static_cast<P&&>(p))
)
)
-> decltype(
declval<conditional_t<true, T, P>>().query(static_cast<P&&>(p))
);
};
#else // defined(BOOST_ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
typedef T type;
#endif // defined(BOOST_ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
};
template <typename T>
struct static_proxy
{
#if defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
struct type
{
template <typename P>
static constexpr auto query(P&& p)
noexcept(
noexcept(
conditional_t<true, T, P>::query(static_cast<P&&>(p))
)
)
-> decltype(
conditional_t<true, T, P>::query(static_cast<P&&>(p))
)
{
return T::query(static_cast<P&&>(p));
}
};
#else // defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
typedef T type;
#endif // defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
};
template <typename T>
struct query_member :
traits::query_member<typename proxy<T>::type, blocking_adaptation_t> {};
template <typename T>
struct query_static_constexpr_member :
traits::query_static_constexpr_member<
typename static_proxy<T>::type, blocking_adaptation_t> {};
#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename T>
static constexpr typename query_static_constexpr_member<T>::result_type
static_query()
noexcept(query_static_constexpr_member<T>::is_noexcept)
{
return query_static_constexpr_member<T>::value();
}
template <typename T>
static constexpr
typename traits::static_query<T, disallowed_t>::result_type
static_query(
enable_if_t<
!query_static_constexpr_member<T>::is_valid
>* = 0,
enable_if_t<
!query_member<T>::is_valid
>* = 0,
enable_if_t<
traits::static_query<T, disallowed_t>::is_valid
>* = 0) noexcept
{
return traits::static_query<T, disallowed_t>::value();
}
template <typename T>
static constexpr
typename traits::static_query<T, allowed_t>::result_type
static_query(
enable_if_t<
!query_static_constexpr_member<T>::is_valid
>* = 0,
enable_if_t<
!query_member<T>::is_valid
>* = 0,
enable_if_t<
!traits::static_query<T, disallowed_t>::is_valid
>* = 0,
enable_if_t<
traits::static_query<T, allowed_t>::is_valid
>* = 0) noexcept
{
return traits::static_query<T, allowed_t>::value();
}
template <typename E,
typename T = decltype(blocking_adaptation_t::static_query<E>())>
static constexpr const T static_query_v
= blocking_adaptation_t::static_query<E>();
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
friend constexpr bool operator==(
const blocking_adaptation_t& a, const blocking_adaptation_t& b)
{
return a.value_ == b.value_;
}
friend constexpr bool operator!=(
const blocking_adaptation_t& a, const blocking_adaptation_t& b)
{
return a.value_ != b.value_;
}
struct convertible_from_blocking_adaptation_t
{
constexpr convertible_from_blocking_adaptation_t(
blocking_adaptation_t)
{
}
};
template <typename Executor>
friend constexpr blocking_adaptation_t query(
const Executor& ex, convertible_from_blocking_adaptation_t,
enable_if_t<
can_query<const Executor&, disallowed_t>::value
>* = 0)
#if !defined(__clang__) // Clang crashes if noexcept is used here.
#if defined(BOOST_ASIO_MSVC) // Visual C++ wants the type to be qualified.
noexcept(is_nothrow_query<const Executor&,
blocking_adaptation_t<>::disallowed_t>::value)
#else // defined(BOOST_ASIO_MSVC)
noexcept(is_nothrow_query<const Executor&, disallowed_t>::value)
#endif // defined(BOOST_ASIO_MSVC)
#endif // !defined(__clang__)
{
return boost::asio::query(ex, disallowed_t());
}
template <typename Executor>
friend constexpr blocking_adaptation_t query(
const Executor& ex, convertible_from_blocking_adaptation_t,
enable_if_t<
!can_query<const Executor&, disallowed_t>::value
>* = 0,
enable_if_t<
can_query<const Executor&, allowed_t>::value
>* = 0)
#if !defined(__clang__) // Clang crashes if noexcept is used here.
#if defined(BOOST_ASIO_MSVC) // Visual C++ wants the type to be qualified.
noexcept(is_nothrow_query<const Executor&,
blocking_adaptation_t<>::allowed_t>::value)
#else // defined(BOOST_ASIO_MSVC)
noexcept(is_nothrow_query<const Executor&, allowed_t>::value)
#endif // defined(BOOST_ASIO_MSVC)
#endif // !defined(__clang__)
{
return boost::asio::query(ex, allowed_t());
}
BOOST_ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(disallowed_t, disallowed);
BOOST_ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(allowed_t, allowed);
private:
int value_;
};
#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <int I> template <typename E, typename T>
const T blocking_adaptation_t<I>::static_query_v;
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <int I>
const typename blocking_adaptation_t<I>::disallowed_t
blocking_adaptation_t<I>::disallowed;
template <int I>
const typename blocking_adaptation_t<I>::allowed_t
blocking_adaptation_t<I>::allowed;
namespace blocking_adaptation {
template <int I = 0>
struct disallowed_t
{
#if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T>
static constexpr bool is_applicable_property_v = is_executor<T>::value;
#endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
static constexpr bool is_requirable = true;
static constexpr bool is_preferable = true;
typedef blocking_adaptation_t<I> polymorphic_query_result_type;
constexpr disallowed_t()
{
}
template <typename T>
struct query_member :
traits::query_member<
typename blocking_adaptation_t<I>::template proxy<T>::type,
disallowed_t> {};
template <typename T>
struct query_static_constexpr_member :
traits::query_static_constexpr_member<
typename blocking_adaptation_t<I>::template static_proxy<T>::type,
disallowed_t> {};
#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename T>
static constexpr
typename query_static_constexpr_member<T>::result_type
static_query()
noexcept(query_static_constexpr_member<T>::is_noexcept)
{
return query_static_constexpr_member<T>::value();
}
template <typename T>
static constexpr disallowed_t static_query(
enable_if_t<
!query_static_constexpr_member<T>::is_valid
>* = 0,
enable_if_t<
!query_member<T>::is_valid
>* = 0,
enable_if_t<
!traits::query_free<T, disallowed_t>::is_valid
>* = 0,
enable_if_t<
!can_query<T, allowed_t<I>>::value
>* = 0) noexcept
{
return disallowed_t();
}
template <typename E, typename T = decltype(disallowed_t::static_query<E>())>
static constexpr const T static_query_v
= disallowed_t::static_query<E>();
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
static constexpr blocking_adaptation_t<I> value()
{
return disallowed_t();
}
friend constexpr bool operator==(const disallowed_t&, const disallowed_t&)
{
return true;
}
friend constexpr bool operator!=(const disallowed_t&, const disallowed_t&)
{
return false;
}
friend constexpr bool operator==(const disallowed_t&, const allowed_t<I>&)
{
return false;
}
friend constexpr bool operator!=(const disallowed_t&, const allowed_t<I>&)
{
return true;
}
};
#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <int I> template <typename E, typename T>
const T disallowed_t<I>::static_query_v;
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename>
struct is_blocking_adaptation_t : false_type
{
};
template <int I>
struct is_blocking_adaptation_t<blocking_adaptation_t<I>> : true_type
{
};
template <typename>
struct is_allowed_t : false_type
{
};
template <int I>
struct is_allowed_t<allowed_t<I>> : true_type
{
};
template <typename>
struct is_disallowed_t : false_type
{
};
template <int I>
struct is_disallowed_t<disallowed_t<I>> : true_type
{
};
template <typename Executor>
class adapter
{
public:
adapter(int, const Executor& e) noexcept
: executor_(e)
{
}
adapter(const adapter& other) noexcept
: executor_(other.executor_)
{
}
adapter(adapter&& other) noexcept
: executor_(static_cast<Executor&&>(other.executor_))
{
}
template <int I>
static constexpr allowed_t<I> query(blocking_adaptation_t<I>) noexcept
{
return allowed_t<I>();
}
template <int I>
static constexpr allowed_t<I> query(allowed_t<I>) noexcept
{
return allowed_t<I>();
}
template <int I>
static constexpr allowed_t<I> query(disallowed_t<I>) noexcept
{
return allowed_t<I>();
}
template <typename Property>
enable_if_t<
can_query<const Executor&, Property>::value
&& !is_blocking_adaptation_t<Property>::value
&& !is_allowed_t<Property>::value
&& !is_disallowed_t<Property>::value,
query_result_t<const Executor&, Property>
> query(const Property& p) const
noexcept(is_nothrow_query<const Executor&, Property>::value)
{
return boost::asio::query(executor_, p);
}
template <int I>
Executor require(disallowed_t<I>) const noexcept
{
return executor_;
}
template <typename Property>
enable_if_t<
can_require<const Executor&, Property>::value
&& !is_blocking_adaptation_t<Property>::value
&& !is_allowed_t<Property>::value
&& !is_disallowed_t<Property>::value,
adapter<decay_t<require_result_t<const Executor&, Property>>>
> require(const Property& p) const
noexcept(is_nothrow_require<const Executor&, Property>::value)
{
return adapter<decay_t<require_result_t<const Executor&, Property>>>(
0, boost::asio::require(executor_, p));
}
template <typename Property>
enable_if_t<
can_prefer<const Executor&, Property>::value
&& !is_blocking_adaptation_t<Property>::value
&& !is_allowed_t<Property>::value
&& !is_disallowed_t<Property>::value,
adapter<decay_t<prefer_result_t<const Executor&, Property>>>
> prefer(const Property& p) const
noexcept(is_nothrow_prefer<const Executor&, Property>::value)
{
return adapter<decay_t<prefer_result_t<const Executor&, Property>>>(
0, boost::asio::prefer(executor_, p));
}
template <typename Function>
enable_if_t<
traits::execute_member<const Executor&, Function>::is_valid
> execute(Function&& f) const
{
executor_.execute(static_cast<Function&&>(f));
}
friend bool operator==(const adapter& a, const adapter& b) noexcept
{
return a.executor_ == b.executor_;
}
friend bool operator!=(const adapter& a, const adapter& b) noexcept
{
return a.executor_ != b.executor_;
}
private:
Executor executor_;
};
template <int I = 0>
struct allowed_t
{
#if defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T>
static constexpr bool is_applicable_property_v = is_executor<T>::value;
#endif // defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
static constexpr bool is_requirable = true;
static constexpr bool is_preferable = false;
typedef blocking_adaptation_t<I> polymorphic_query_result_type;
constexpr allowed_t()
{
}
template <typename T>
struct query_member :
traits::query_member<
typename blocking_adaptation_t<I>::template proxy<T>::type,
allowed_t> {};
template <typename T>
struct query_static_constexpr_member :
traits::query_static_constexpr_member<
typename blocking_adaptation_t<I>::template static_proxy<T>::type,
allowed_t> {};
#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename T>
static constexpr typename query_static_constexpr_member<T>::result_type
static_query()
noexcept(query_static_constexpr_member<T>::is_noexcept)
{
return query_static_constexpr_member<T>::value();
}
template <typename E, typename T = decltype(allowed_t::static_query<E>())>
static constexpr const T static_query_v = allowed_t::static_query<E>();
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
static constexpr blocking_adaptation_t<I> value()
{
return allowed_t();
}
friend constexpr bool operator==(const allowed_t&, const allowed_t&)
{
return true;
}
friend constexpr bool operator!=(const allowed_t&, const allowed_t&)
{
return false;
}
friend constexpr bool operator==(const allowed_t&, const disallowed_t<I>&)
{
return false;
}
friend constexpr bool operator!=(const allowed_t&, const disallowed_t<I>&)
{
return true;
}
template <typename Executor>
friend adapter<Executor> require(
const Executor& e, const allowed_t&,
enable_if_t<
is_executor<Executor>::value
>* = 0)
{
return adapter<Executor>(0, e);
}
};
#if defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <int I> template <typename E, typename T>
const T allowed_t<I>::static_query_v;
#endif // defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename Function>
class blocking_execute_state
{
public:
template <typename F>
blocking_execute_state(F&& f)
: func_(static_cast<F&&>(f)),
is_complete_(false)
{
}
template <typename Executor>
void execute_and_wait(Executor&& ex)
{
handler h = { this };
ex.execute(h);
boost::asio::detail::mutex::scoped_lock lock(mutex_);
while (!is_complete_)
event_.wait(lock);
}
struct cleanup
{
~cleanup()
{
boost::asio::detail::mutex::scoped_lock lock(state_->mutex_);
state_->is_complete_ = true;
state_->event_.unlock_and_signal_one_for_destruction(lock);
}
blocking_execute_state* state_;
};
struct handler
{
void operator()()
{
cleanup c = { state_ };
state_->func_();
}
blocking_execute_state* state_;
};
Function func_;
boost::asio::detail::mutex mutex_;
boost::asio::detail::event event_;
bool is_complete_;
};
template <typename Executor, typename Function>
void blocking_execute(
Executor&& ex,
Function&& func)
{
typedef decay_t<Function> func_t;
blocking_execute_state<func_t> state(static_cast<Function&&>(func));
state.execute_and_wait(ex);
}
} // namespace blocking_adaptation
} // namespace detail
typedef detail::blocking_adaptation_t<> blocking_adaptation_t;
BOOST_ASIO_INLINE_VARIABLE constexpr blocking_adaptation_t blocking_adaptation;
} // namespace execution
#if !defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T>
struct is_applicable_property<T, execution::blocking_adaptation_t>
: integral_constant<bool, execution::is_executor<T>::value>
{
};
template <typename T>
struct is_applicable_property<T, execution::blocking_adaptation_t::disallowed_t>
: integral_constant<bool, execution::is_executor<T>::value>
{
};
template <typename T>
struct is_applicable_property<T, execution::blocking_adaptation_t::allowed_t>
: integral_constant<bool, execution::is_executor<T>::value>
{
};
#endif // !defined(BOOST_ASIO_HAS_VARIABLE_TEMPLATES)
namespace traits {
#if !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)
template <typename T>
struct query_free_default<T, execution::blocking_adaptation_t,
enable_if_t<
can_query<T, execution::blocking_adaptation_t::disallowed_t>::value
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept =
is_nothrow_query<T, execution::blocking_adaptation_t::disallowed_t>::value;
typedef execution::blocking_adaptation_t result_type;
};
template <typename T>
struct query_free_default<T, execution::blocking_adaptation_t,
enable_if_t<
!can_query<T, execution::blocking_adaptation_t::disallowed_t>::value
&& can_query<T, execution::blocking_adaptation_t::allowed_t>::value
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept =
is_nothrow_query<T, execution::blocking_adaptation_t::allowed_t>::value;
typedef execution::blocking_adaptation_t result_type;
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)
#if !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|| !defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename T>
struct static_query<T, execution::blocking_adaptation_t,
enable_if_t<
execution::detail::blocking_adaptation_t<0>::
query_static_constexpr_member<T>::is_valid
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef typename execution::detail::blocking_adaptation_t<0>::
query_static_constexpr_member<T>::result_type result_type;
static constexpr result_type value()
{
return execution::detail::blocking_adaptation_t<0>::
query_static_constexpr_member<T>::value();
}
};
template <typename T>
struct static_query<T, execution::blocking_adaptation_t,
enable_if_t<
!execution::detail::blocking_adaptation_t<0>::
query_static_constexpr_member<T>::is_valid
&& !execution::detail::blocking_adaptation_t<0>::
query_member<T>::is_valid
&& traits::static_query<T,
execution::blocking_adaptation_t::disallowed_t>::is_valid
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef typename traits::static_query<T,
execution::blocking_adaptation_t::disallowed_t>::result_type result_type;
static constexpr result_type value()
{
return traits::static_query<T,
execution::blocking_adaptation_t::disallowed_t>::value();
}
};
template <typename T>
struct static_query<T, execution::blocking_adaptation_t,
enable_if_t<
!execution::detail::blocking_adaptation_t<0>::
query_static_constexpr_member<T>::is_valid
&& !execution::detail::blocking_adaptation_t<0>::
query_member<T>::is_valid
&& !traits::static_query<T,
execution::blocking_adaptation_t::disallowed_t>::is_valid
&& traits::static_query<T,
execution::blocking_adaptation_t::allowed_t>::is_valid
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef typename traits::static_query<T,
execution::blocking_adaptation_t::allowed_t>::result_type result_type;
static constexpr result_type value()
{
return traits::static_query<T,
execution::blocking_adaptation_t::allowed_t>::value();
}
};
template <typename T>
struct static_query<T, execution::blocking_adaptation_t::disallowed_t,
enable_if_t<
execution::detail::blocking_adaptation::disallowed_t<0>::
query_static_constexpr_member<T>::is_valid
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef typename execution::detail::blocking_adaptation::disallowed_t<0>::
query_static_constexpr_member<T>::result_type result_type;
static constexpr result_type value()
{
return execution::detail::blocking_adaptation::disallowed_t<0>::
query_static_constexpr_member<T>::value();
}
};
template <typename T>
struct static_query<T, execution::blocking_adaptation_t::disallowed_t,
enable_if_t<
!execution::detail::blocking_adaptation::disallowed_t<0>::
query_static_constexpr_member<T>::is_valid
&& !execution::detail::blocking_adaptation::disallowed_t<0>::
query_member<T>::is_valid
&& !traits::query_free<T,
execution::blocking_adaptation_t::disallowed_t>::is_valid
&& !can_query<T, execution::blocking_adaptation_t::allowed_t>::value
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef execution::blocking_adaptation_t::disallowed_t result_type;
static constexpr result_type value()
{
return result_type();
}
};
template <typename T>
struct static_query<T, execution::blocking_adaptation_t::allowed_t,
enable_if_t<
execution::detail::blocking_adaptation::allowed_t<0>::
query_static_constexpr_member<T>::is_valid
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef typename execution::detail::blocking_adaptation::allowed_t<0>::
query_static_constexpr_member<T>::result_type result_type;
static constexpr result_type value()
{
return execution::detail::blocking_adaptation::allowed_t<0>::
query_static_constexpr_member<T>::value();
}
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// || !defined(BOOST_ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
#if !defined(BOOST_ASIO_HAS_DEDUCED_REQUIRE_FREE_TRAIT)
template <typename T>
struct require_free_default<T, execution::blocking_adaptation_t::allowed_t,
enable_if_t<
is_same<T, decay_t<T>>::value
&& execution::is_executor<T>::value
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = false;
typedef execution::detail::blocking_adaptation::adapter<T> result_type;
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_REQUIRE_FREE_TRAIT)
#if !defined(BOOST_ASIO_HAS_DEDUCED_EQUALITY_COMPARABLE_TRAIT)
template <typename Executor>
struct equality_comparable<
execution::detail::blocking_adaptation::adapter<Executor>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_EQUALITY_COMPARABLE_TRAIT)
#if !defined(BOOST_ASIO_HAS_DEDUCED_EXECUTE_MEMBER_TRAIT)
template <typename Executor, typename Function>
struct execute_member<
execution::detail::blocking_adaptation::adapter<Executor>, Function>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = false;
typedef void result_type;
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_EXECUTE_MEMBER_TRAIT)
#if !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
template <typename Executor, int I>
struct query_static_constexpr_member<
execution::detail::blocking_adaptation::adapter<Executor>,
execution::detail::blocking_adaptation_t<I>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef execution::blocking_adaptation_t::allowed_t result_type;
static constexpr result_type value() noexcept
{
return result_type();
}
};
template <typename Executor, int I>
struct query_static_constexpr_member<
execution::detail::blocking_adaptation::adapter<Executor>,
execution::detail::blocking_adaptation::allowed_t<I>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef execution::blocking_adaptation_t::allowed_t result_type;
static constexpr result_type value() noexcept
{
return result_type();
}
};
template <typename Executor, int I>
struct query_static_constexpr_member<
execution::detail::blocking_adaptation::adapter<Executor>,
execution::detail::blocking_adaptation::disallowed_t<I>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef execution::blocking_adaptation_t::allowed_t result_type;
static constexpr result_type value() noexcept
{
return result_type();
}
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
#if !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
template <typename Executor, typename Property>
struct query_member<
execution::detail::blocking_adaptation::adapter<Executor>, Property,
enable_if_t<
can_query<const Executor&, Property>::value
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept =
is_nothrow_query<Executor, Property>::value;
typedef query_result_t<Executor, Property> result_type;
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
#if !defined(BOOST_ASIO_HAS_DEDUCED_REQUIRE_MEMBER_TRAIT)
template <typename Executor, int I>
struct require_member<
execution::detail::blocking_adaptation::adapter<Executor>,
execution::detail::blocking_adaptation::disallowed_t<I>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept = true;
typedef Executor result_type;
};
template <typename Executor, typename Property>
struct require_member<
execution::detail::blocking_adaptation::adapter<Executor>, Property,
enable_if_t<
can_require<const Executor&, Property>::value
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept =
is_nothrow_require<Executor, Property>::value;
typedef execution::detail::blocking_adaptation::adapter<
decay_t<require_result_t<Executor, Property>>> result_type;
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_REQUIRE_MEMBER_TRAIT)
#if !defined(BOOST_ASIO_HAS_DEDUCED_PREFER_MEMBER_TRAIT)
template <typename Executor, typename Property>
struct prefer_member<
execution::detail::blocking_adaptation::adapter<Executor>, Property,
enable_if_t<
can_prefer<const Executor&, Property>::value
>>
{
static constexpr bool is_valid = true;
static constexpr bool is_noexcept =
is_nothrow_prefer<Executor, Property>::value;
typedef execution::detail::blocking_adaptation::adapter<
decay_t<prefer_result_t<Executor, Property>>> result_type;
};
#endif // !defined(BOOST_ASIO_HAS_DEDUCED_PREFER_MEMBER_TRAIT)
} // namespace traits
#endif // defined(GENERATING_DOCUMENTATION)
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_EXECUTION_BLOCKING_ADAPTATION_HPP