| // |
| // impl/system_executor.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2021 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_IMPL_SYSTEM_EXECUTOR_HPP |
| #define BOOST_ASIO_IMPL_SYSTEM_EXECUTOR_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/executor_op.hpp> |
| #include <boost/asio/detail/global.hpp> |
| #include <boost/asio/detail/type_traits.hpp> |
| #include <boost/asio/system_context.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| namespace boost { |
| namespace asio { |
| |
| template <typename Blocking, typename Relationship, typename Allocator> |
| inline system_context& |
| basic_system_executor<Blocking, Relationship, Allocator>::query( |
| execution::context_t) BOOST_ASIO_NOEXCEPT |
| { |
| return detail::global<system_context>(); |
| } |
| |
| template <typename Blocking, typename Relationship, typename Allocator> |
| inline std::size_t |
| basic_system_executor<Blocking, Relationship, Allocator>::query( |
| execution::occupancy_t) const BOOST_ASIO_NOEXCEPT |
| { |
| return detail::global<system_context>().num_threads_; |
| } |
| |
| template <typename Blocking, typename Relationship, typename Allocator> |
| template <typename Function> |
| inline void |
| basic_system_executor<Blocking, Relationship, Allocator>::do_execute( |
| BOOST_ASIO_MOVE_ARG(Function) f, execution::blocking_t::possibly_t) const |
| { |
| // Obtain a non-const instance of the function. |
| detail::non_const_lvalue<Function> f2(f); |
| |
| #if !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| try |
| { |
| #endif// !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| detail::fenced_block b(detail::fenced_block::full); |
| boost_asio_handler_invoke_helpers::invoke(f2.value, f2.value); |
| #if !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| } |
| catch (...) |
| { |
| std::terminate(); |
| } |
| #endif// !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| } |
| |
| template <typename Blocking, typename Relationship, typename Allocator> |
| template <typename Function> |
| inline void |
| basic_system_executor<Blocking, Relationship, Allocator>::do_execute( |
| BOOST_ASIO_MOVE_ARG(Function) f, execution::blocking_t::always_t) const |
| { |
| // Obtain a non-const instance of the function. |
| detail::non_const_lvalue<Function> f2(f); |
| |
| #if !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| try |
| { |
| #endif// !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| detail::fenced_block b(detail::fenced_block::full); |
| boost_asio_handler_invoke_helpers::invoke(f2.value, f2.value); |
| #if !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| } |
| catch (...) |
| { |
| std::terminate(); |
| } |
| #endif// !defined(BOOST_ASIO_NO_EXCEPTIONS) |
| } |
| |
| template <typename Blocking, typename Relationship, typename Allocator> |
| template <typename Function> |
| void basic_system_executor<Blocking, Relationship, Allocator>::do_execute( |
| BOOST_ASIO_MOVE_ARG(Function) f, execution::blocking_t::never_t) const |
| { |
| system_context& ctx = detail::global<system_context>(); |
| |
| // Allocate and construct an operation to wrap the function. |
| typedef typename decay<Function>::type function_type; |
| typedef detail::executor_op<function_type, Allocator> op; |
| typename op::ptr p = { detail::addressof(allocator_), |
| op::ptr::allocate(allocator_), 0 }; |
| p.p = new (p.v) op(BOOST_ASIO_MOVE_CAST(Function)(f), allocator_); |
| |
| if (is_same<Relationship, execution::relationship_t::continuation_t>::value) |
| { |
| BOOST_ASIO_HANDLER_CREATION((ctx, *p.p, |
| "system_executor", &ctx, 0, "execute(blk=never,rel=cont)")); |
| } |
| else |
| { |
| BOOST_ASIO_HANDLER_CREATION((ctx, *p.p, |
| "system_executor", &ctx, 0, "execute(blk=never,rel=fork)")); |
| } |
| |
| ctx.scheduler_.post_immediate_completion(p.p, |
| is_same<Relationship, execution::relationship_t::continuation_t>::value); |
| p.v = p.p = 0; |
| } |
| |
| #if !defined(BOOST_ASIO_NO_TS_EXECUTORS) |
| template <typename Blocking, typename Relationship, typename Allocator> |
| inline system_context& basic_system_executor< |
| Blocking, Relationship, Allocator>::context() const BOOST_ASIO_NOEXCEPT |
| { |
| return detail::global<system_context>(); |
| } |
| |
| template <typename Blocking, typename Relationship, typename Allocator> |
| template <typename Function, typename OtherAllocator> |
| void basic_system_executor<Blocking, Relationship, Allocator>::dispatch( |
| BOOST_ASIO_MOVE_ARG(Function) f, const OtherAllocator&) const |
| { |
| typename decay<Function>::type tmp(BOOST_ASIO_MOVE_CAST(Function)(f)); |
| boost_asio_handler_invoke_helpers::invoke(tmp, tmp); |
| } |
| |
| template <typename Blocking, typename Relationship, typename Allocator> |
| template <typename Function, typename OtherAllocator> |
| void basic_system_executor<Blocking, Relationship, Allocator>::post( |
| BOOST_ASIO_MOVE_ARG(Function) f, const OtherAllocator& a) const |
| { |
| typedef typename decay<Function>::type function_type; |
| |
| system_context& ctx = detail::global<system_context>(); |
| |
| // Allocate and construct an operation to wrap the function. |
| typedef detail::executor_op<function_type, OtherAllocator> op; |
| typename op::ptr p = { detail::addressof(a), op::ptr::allocate(a), 0 }; |
| p.p = new (p.v) op(BOOST_ASIO_MOVE_CAST(Function)(f), a); |
| |
| BOOST_ASIO_HANDLER_CREATION((ctx, *p.p, |
| "system_executor", &this->context(), 0, "post")); |
| |
| ctx.scheduler_.post_immediate_completion(p.p, false); |
| p.v = p.p = 0; |
| } |
| |
| template <typename Blocking, typename Relationship, typename Allocator> |
| template <typename Function, typename OtherAllocator> |
| void basic_system_executor<Blocking, Relationship, Allocator>::defer( |
| BOOST_ASIO_MOVE_ARG(Function) f, const OtherAllocator& a) const |
| { |
| typedef typename decay<Function>::type function_type; |
| |
| system_context& ctx = detail::global<system_context>(); |
| |
| // Allocate and construct an operation to wrap the function. |
| typedef detail::executor_op<function_type, OtherAllocator> op; |
| typename op::ptr p = { detail::addressof(a), op::ptr::allocate(a), 0 }; |
| p.p = new (p.v) op(BOOST_ASIO_MOVE_CAST(Function)(f), a); |
| |
| BOOST_ASIO_HANDLER_CREATION((ctx, *p.p, |
| "system_executor", &this->context(), 0, "defer")); |
| |
| ctx.scheduler_.post_immediate_completion(p.p, true); |
| p.v = p.p = 0; |
| } |
| #endif // !defined(BOOST_ASIO_NO_TS_EXECUTORS) |
| |
| } // namespace asio |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // BOOST_ASIO_IMPL_SYSTEM_EXECUTOR_HPP |