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-rw-r--r--3rdparty/asio/include/asio/bind_executor.hpp343
1 files changed, 157 insertions, 186 deletions
diff --git a/3rdparty/asio/include/asio/bind_executor.hpp b/3rdparty/asio/include/asio/bind_executor.hpp
index 3ed890d9d73..f117b4ce903 100644
--- a/3rdparty/asio/include/asio/bind_executor.hpp
+++ b/3rdparty/asio/include/asio/bind_executor.hpp
@@ -2,7 +2,7 @@
// bind_executor.hpp
// ~~~~~~~~~~~~~~~~~
//
-// Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+// 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)
@@ -17,10 +17,10 @@
#include "asio/detail/config.hpp"
#include "asio/detail/type_traits.hpp"
-#include "asio/detail/variadic_templates.hpp"
#include "asio/associated_executor.hpp"
-#include "asio/associated_allocator.hpp"
+#include "asio/associator.hpp"
#include "asio/async_result.hpp"
+#include "asio/execution/executor.hpp"
#include "asio/execution_context.hpp"
#include "asio/is_executor.hpp"
#include "asio/uses_executor.hpp"
@@ -30,12 +30,6 @@
namespace asio {
namespace detail {
-template <typename T>
-struct executor_binder_check
-{
- typedef void type;
-};
-
// Helper to automatically define nested typedef result_type.
template <typename T, typename = void>
@@ -46,8 +40,7 @@ protected:
};
template <typename T>
-struct executor_binder_result_type<T,
- typename executor_binder_check<typename T::result_type>::type>
+struct executor_binder_result_type<T, void_t<typename T::result_type>>
{
typedef typename T::result_type result_type;
protected:
@@ -108,8 +101,7 @@ template <typename T, typename = void>
struct executor_binder_argument_type {};
template <typename T>
-struct executor_binder_argument_type<T,
- typename executor_binder_check<typename T::argument_type>::type>
+struct executor_binder_argument_type<T, void_t<typename T::argument_type>>
{
typedef typename T::argument_type argument_type;
};
@@ -134,7 +126,7 @@ struct executor_binder_argument_types {};
template <typename T>
struct executor_binder_argument_types<T,
- typename executor_binder_check<typename T::first_argument_type>::type>
+ void_t<typename T::first_argument_type>>
{
typedef typename T::first_argument_type first_argument_type;
typedef typename T::second_argument_type second_argument_type;
@@ -154,22 +146,20 @@ struct executor_binder_argument_type<R(&)(A1, A2)>
typedef A2 second_argument_type;
};
-// Helper to:
-// - Apply the empty base optimisation to the executor.
-// - Perform uses_executor construction of the target type, if required.
+// Helper to perform uses_executor construction of the target type, if
+// required.
template <typename T, typename Executor, bool UsesExecutor>
class executor_binder_base;
template <typename T, typename Executor>
class executor_binder_base<T, Executor, true>
- : protected Executor
{
protected:
template <typename E, typename U>
- executor_binder_base(ASIO_MOVE_ARG(E) e, ASIO_MOVE_ARG(U) u)
- : executor_(ASIO_MOVE_CAST(E)(e)),
- target_(executor_arg_t(), executor_, ASIO_MOVE_CAST(U)(u))
+ executor_binder_base(E&& e, U&& u)
+ : executor_(static_cast<E&&>(e)),
+ target_(executor_arg_t(), executor_, static_cast<U&&>(u))
{
}
@@ -182,9 +172,9 @@ class executor_binder_base<T, Executor, false>
{
protected:
template <typename E, typename U>
- executor_binder_base(ASIO_MOVE_ARG(E) e, ASIO_MOVE_ARG(U) u)
- : executor_(ASIO_MOVE_CAST(E)(e)),
- target_(ASIO_MOVE_CAST(U)(u))
+ executor_binder_base(E&& e, U&& u)
+ : executor_(static_cast<E&&>(e)),
+ target_(static_cast<U&&>(u))
{
}
@@ -192,21 +182,6 @@ protected:
T target_;
};
-// Helper to enable SFINAE on zero-argument operator() below.
-
-template <typename T, typename = void>
-struct executor_binder_result_of0
-{
- typedef void type;
-};
-
-template <typename T>
-struct executor_binder_result_of0<T,
- typename executor_binder_check<typename result_of<T()>::type>::type>
-{
- typedef typename result_of<T()>::type type;
-};
-
} // namespace detail
/// A call wrapper type to bind an executor of type @c Executor to an object of
@@ -297,8 +272,8 @@ public:
*/
template <typename U>
executor_binder(executor_arg_t, const executor_type& e,
- ASIO_MOVE_ARG(U) u)
- : base_type(e, ASIO_MOVE_CAST(U)(u))
+ U&& u)
+ : base_type(e, static_cast<U&&>(u))
{
}
@@ -322,7 +297,9 @@ public:
* @c U.
*/
template <typename U, typename OtherExecutor>
- executor_binder(const executor_binder<U, OtherExecutor>& other)
+ executor_binder(const executor_binder<U, OtherExecutor>& other,
+ constraint_t<is_constructible<Executor, OtherExecutor>::value> = 0,
+ constraint_t<is_constructible<T, U>::value> = 0)
: base_type(other.get_executor(), other.get())
{
}
@@ -335,32 +312,33 @@ public:
*/
template <typename U, typename OtherExecutor>
executor_binder(executor_arg_t, const executor_type& e,
- const executor_binder<U, OtherExecutor>& other)
+ const executor_binder<U, OtherExecutor>& other,
+ constraint_t<is_constructible<T, U>::value> = 0)
: base_type(e, other.get())
{
}
-#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
-
/// Move constructor.
executor_binder(executor_binder&& other)
- : base_type(ASIO_MOVE_CAST(executor_type)(other.get_executor()),
- ASIO_MOVE_CAST(T)(other.get()))
+ : base_type(static_cast<executor_type&&>(other.get_executor()),
+ static_cast<T&&>(other.get()))
{
}
/// Move construct the target object, but specify a different executor.
executor_binder(executor_arg_t, const executor_type& e,
executor_binder&& other)
- : base_type(e, ASIO_MOVE_CAST(T)(other.get()))
+ : base_type(e, static_cast<T&&>(other.get()))
{
}
/// Move construct from a different executor wrapper type.
template <typename U, typename OtherExecutor>
- executor_binder(executor_binder<U, OtherExecutor>&& other)
- : base_type(ASIO_MOVE_CAST(OtherExecutor)(other.get_executor()),
- ASIO_MOVE_CAST(U)(other.get()))
+ executor_binder(executor_binder<U, OtherExecutor>&& other,
+ constraint_t<is_constructible<Executor, OtherExecutor>::value> = 0,
+ constraint_t<is_constructible<T, U>::value> = 0)
+ : base_type(static_cast<OtherExecutor&&>(other.get_executor()),
+ static_cast<U&&>(other.get()))
{
}
@@ -368,124 +346,49 @@ public:
/// different executor.
template <typename U, typename OtherExecutor>
executor_binder(executor_arg_t, const executor_type& e,
- executor_binder<U, OtherExecutor>&& other)
- : base_type(e, ASIO_MOVE_CAST(U)(other.get()))
+ executor_binder<U, OtherExecutor>&& other,
+ constraint_t<is_constructible<T, U>::value> = 0)
+ : base_type(e, static_cast<U&&>(other.get()))
{
}
-#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
-
/// Destructor.
~executor_binder()
{
}
/// Obtain a reference to the target object.
- target_type& get() ASIO_NOEXCEPT
+ target_type& get() noexcept
{
return this->target_;
}
/// Obtain a reference to the target object.
- const target_type& get() const ASIO_NOEXCEPT
+ const target_type& get() const noexcept
{
return this->target_;
}
/// Obtain the associated executor.
- executor_type get_executor() const ASIO_NOEXCEPT
+ executor_type get_executor() const noexcept
{
return this->executor_;
}
-#if defined(GENERATING_DOCUMENTATION)
-
- template <typename... Args> auto operator()(Args&& ...);
- template <typename... Args> auto operator()(Args&& ...) const;
-
-#elif defined(ASIO_HAS_VARIADIC_TEMPLATES)
-
/// Forwarding function call operator.
template <typename... Args>
- typename result_of<T(Args...)>::type operator()(
- ASIO_MOVE_ARG(Args)... args)
+ result_of_t<T(Args...)> operator()(Args&&... args)
{
- return this->target_(ASIO_MOVE_CAST(Args)(args)...);
+ return this->target_(static_cast<Args&&>(args)...);
}
/// Forwarding function call operator.
template <typename... Args>
- typename result_of<T(Args...)>::type operator()(
- ASIO_MOVE_ARG(Args)... args) const
- {
- return this->target_(ASIO_MOVE_CAST(Args)(args)...);
- }
-
-#elif defined(ASIO_HAS_STD_TYPE_TRAITS) && !defined(_MSC_VER)
-
- typename detail::executor_binder_result_of0<T>::type operator()()
- {
- return this->target_();
- }
-
- typename detail::executor_binder_result_of0<T>::type operator()() const
- {
- return this->target_();
- }
-
-#define ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF(n) \
- template <ASIO_VARIADIC_TPARAMS(n)> \
- typename result_of<T(ASIO_VARIADIC_TARGS(n))>::type operator()( \
- ASIO_VARIADIC_MOVE_PARAMS(n)) \
- { \
- return this->target_(ASIO_VARIADIC_MOVE_ARGS(n)); \
- } \
- \
- template <ASIO_VARIADIC_TPARAMS(n)> \
- typename result_of<T(ASIO_VARIADIC_TARGS(n))>::type operator()( \
- ASIO_VARIADIC_MOVE_PARAMS(n)) const \
- { \
- return this->target_(ASIO_VARIADIC_MOVE_ARGS(n)); \
- } \
- /**/
- ASIO_VARIADIC_GENERATE(ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF)
-#undef ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF
-
-#else // defined(ASIO_HAS_STD_TYPE_TRAITS) && !defined(_MSC_VER)
-
- typedef typename detail::executor_binder_result_type<T>::result_type_or_void
- result_type_or_void;
-
- result_type_or_void operator()()
- {
- return this->target_();
- }
-
- result_type_or_void operator()() const
+ result_of_t<T(Args...)> operator()(Args&&... args) const
{
- return this->target_();
+ return this->target_(static_cast<Args&&>(args)...);
}
-#define ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF(n) \
- template <ASIO_VARIADIC_TPARAMS(n)> \
- result_type_or_void operator()( \
- ASIO_VARIADIC_MOVE_PARAMS(n)) \
- { \
- return this->target_(ASIO_VARIADIC_MOVE_ARGS(n)); \
- } \
- \
- template <ASIO_VARIADIC_TPARAMS(n)> \
- result_type_or_void operator()( \
- ASIO_VARIADIC_MOVE_PARAMS(n)) const \
- { \
- return this->target_(ASIO_VARIADIC_MOVE_ARGS(n)); \
- } \
- /**/
- ASIO_VARIADIC_GENERATE(ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF)
-#undef ASIO_PRIVATE_BIND_EXECUTOR_CALL_DEF
-
-#endif // defined(ASIO_HAS_STD_TYPE_TRAITS) && !defined(_MSC_VER)
-
private:
typedef detail::executor_binder_base<T, Executor,
uses_executor<T, Executor>::value> base_type;
@@ -493,25 +396,27 @@ private:
/// Associate an object of type @c T with an executor of type @c Executor.
template <typename Executor, typename T>
-inline executor_binder<typename decay<T>::type, Executor>
-bind_executor(const Executor& ex, ASIO_MOVE_ARG(T) t,
- typename enable_if<is_executor<Executor>::value>::type* = 0)
+ASIO_NODISCARD inline executor_binder<decay_t<T>, Executor>
+bind_executor(const Executor& ex, T&& t,
+ constraint_t<
+ is_executor<Executor>::value || execution::is_executor<Executor>::value
+ > = 0)
{
- return executor_binder<typename decay<T>::type, Executor>(
- executor_arg_t(), ex, ASIO_MOVE_CAST(T)(t));
+ return executor_binder<decay_t<T>, Executor>(
+ executor_arg_t(), ex, static_cast<T&&>(t));
}
/// Associate an object of type @c T with an execution context's executor.
template <typename ExecutionContext, typename T>
-inline executor_binder<typename decay<T>::type,
- typename ExecutionContext::executor_type>
-bind_executor(ExecutionContext& ctx, ASIO_MOVE_ARG(T) t,
- typename enable_if<is_convertible<
- ExecutionContext&, execution_context&>::value>::type* = 0)
+ASIO_NODISCARD inline executor_binder<decay_t<T>,
+ typename ExecutionContext::executor_type>
+bind_executor(ExecutionContext& ctx, T&& t,
+ constraint_t<
+ is_convertible<ExecutionContext&, execution_context&>::value
+ > = 0)
{
- return executor_binder<typename decay<T>::type,
- typename ExecutionContext::executor_type>(
- executor_arg_t(), ctx.get_executor(), ASIO_MOVE_CAST(T)(t));
+ return executor_binder<decay_t<T>, typename ExecutionContext::executor_type>(
+ executor_arg_t(), ctx.get_executor(), static_cast<T&&>(t));
}
#if !defined(GENERATING_DOCUMENTATION)
@@ -520,73 +425,138 @@ template <typename T, typename Executor>
struct uses_executor<executor_binder<T, Executor>, Executor>
: true_type {};
-template <typename T, typename Executor, typename Signature>
-class async_result<executor_binder<T, Executor>, Signature>
+namespace detail {
+
+template <typename TargetAsyncResult, typename Executor, typename = void>
+class executor_binder_completion_handler_async_result
+{
+public:
+ template <typename T>
+ explicit executor_binder_completion_handler_async_result(T&)
+ {
+ }
+};
+
+template <typename TargetAsyncResult, typename Executor>
+class executor_binder_completion_handler_async_result<
+ TargetAsyncResult, Executor,
+ void_t<typename TargetAsyncResult::completion_handler_type >>
{
+private:
+ TargetAsyncResult target_;
+
public:
typedef executor_binder<
- typename async_result<T, Signature>::completion_handler_type, Executor>
+ typename TargetAsyncResult::completion_handler_type, Executor>
completion_handler_type;
- typedef typename async_result<T, Signature>::return_type return_type;
-
- explicit async_result(executor_binder<T, Executor>& b)
- : target_(b.get())
+ explicit executor_binder_completion_handler_async_result(
+ typename TargetAsyncResult::completion_handler_type& handler)
+ : target_(handler)
{
}
- return_type get()
+ auto get() -> decltype(target_.get())
{
return target_.get();
}
-
-private:
- async_result(const async_result&) ASIO_DELETED;
- async_result& operator=(const async_result&) ASIO_DELETED;
-
- async_result<T, Signature> target_;
};
-#if !defined(ASIO_NO_DEPRECATED)
+template <typename TargetAsyncResult, typename = void>
+struct executor_binder_async_result_return_type
+{
+};
-template <typename T, typename Executor, typename Signature>
-struct handler_type<executor_binder<T, Executor>, Signature>
+template <typename TargetAsyncResult>
+struct executor_binder_async_result_return_type<TargetAsyncResult,
+ void_t<typename TargetAsyncResult::return_type>>
{
- typedef executor_binder<
- typename handler_type<T, Signature>::type, Executor> type;
+ typedef typename TargetAsyncResult::return_type return_type;
};
-template <typename T, typename Executor>
-class async_result<executor_binder<T, Executor> >
+} // namespace detail
+
+template <typename T, typename Executor, typename Signature>
+class async_result<executor_binder<T, Executor>, Signature> :
+ public detail::executor_binder_completion_handler_async_result<
+ async_result<T, Signature>, Executor>,
+ public detail::executor_binder_async_result_return_type<
+ async_result<T, Signature>>
{
public:
- typedef typename async_result<T>::type type;
-
explicit async_result(executor_binder<T, Executor>& b)
- : target_(b.get())
+ : detail::executor_binder_completion_handler_async_result<
+ async_result<T, Signature>, Executor>(b.get())
{
}
- type get()
+ template <typename Initiation>
+ struct init_wrapper
{
- return target_.get();
+ template <typename Init>
+ init_wrapper(const Executor& ex, Init&& init)
+ : ex_(ex),
+ initiation_(static_cast<Init&&>(init))
+ {
+ }
+
+ template <typename Handler, typename... Args>
+ void operator()(Handler&& handler, Args&&... args)
+ {
+ static_cast<Initiation&&>(initiation_)(
+ executor_binder<decay_t<Handler>, Executor>(
+ executor_arg_t(), ex_, static_cast<Handler&&>(handler)),
+ static_cast<Args&&>(args)...);
+ }
+
+ template <typename Handler, typename... Args>
+ void operator()(Handler&& handler, Args&&... args) const
+ {
+ initiation_(
+ executor_binder<decay_t<Handler>, Executor>(
+ executor_arg_t(), ex_, static_cast<Handler&&>(handler)),
+ static_cast<Args&&>(args)...);
+ }
+
+ Executor ex_;
+ Initiation initiation_;
+ };
+
+ template <typename Initiation, typename RawCompletionToken, typename... Args>
+ static auto initiate(Initiation&& initiation,
+ RawCompletionToken&& token, Args&&... args)
+ -> decltype(
+ async_initiate<T, Signature>(
+ declval<init_wrapper<decay_t<Initiation>>>(),
+ token.get(), static_cast<Args&&>(args)...))
+ {
+ return async_initiate<T, Signature>(
+ init_wrapper<decay_t<Initiation>>(
+ token.get_executor(), static_cast<Initiation&&>(initiation)),
+ token.get(), static_cast<Args&&>(args)...);
}
private:
- async_result<T> target_;
+ async_result(const async_result&) = delete;
+ async_result& operator=(const async_result&) = delete;
};
-#endif // !defined(ASIO_NO_DEPRECATED)
-
-template <typename T, typename Executor, typename Allocator>
-struct associated_allocator<executor_binder<T, Executor>, Allocator>
+template <template <typename, typename> class Associator,
+ typename T, typename Executor, typename DefaultCandidate>
+struct associator<Associator, executor_binder<T, Executor>, DefaultCandidate>
+ : Associator<T, DefaultCandidate>
{
- typedef typename associated_allocator<T, Allocator>::type type;
+ static typename Associator<T, DefaultCandidate>::type get(
+ const executor_binder<T, Executor>& b) noexcept
+ {
+ return Associator<T, DefaultCandidate>::get(b.get());
+ }
- static type get(const executor_binder<T, Executor>& b,
- const Allocator& a = Allocator()) ASIO_NOEXCEPT
+ static auto get(const executor_binder<T, Executor>& b,
+ const DefaultCandidate& c) noexcept
+ -> decltype(Associator<T, DefaultCandidate>::get(b.get(), c))
{
- return associated_allocator<T, Allocator>::get(b.get(), a);
+ return Associator<T, DefaultCandidate>::get(b.get(), c);
}
};
@@ -595,8 +565,9 @@ struct associated_executor<executor_binder<T, Executor>, Executor1>
{
typedef Executor type;
- static type get(const executor_binder<T, Executor>& b,
- const Executor1& = Executor1()) ASIO_NOEXCEPT
+ static auto get(const executor_binder<T, Executor>& b,
+ const Executor1& = Executor1()) noexcept
+ -> decltype(b.get_executor())
{
return b.get_executor();
}