FM / impl

/usr/include/boost/asio/impl

Name	Size	Mode	Actions
awaitable.hpp	11748	0644	edit dl rm
buffered_read_stream.hpp	16925	0644	edit dl rm
buffered_write_stream.hpp	16429	0644	edit dl rm
compose.hpp	20461	0644	edit dl rm
connect.hpp	32234	0644	edit dl rm
co_spawn.hpp	8834	0644	edit dl rm
defer.hpp	7803	0644	edit dl rm
detached.hpp	3374	0644	edit dl rm
dispatch.hpp	7567	0644	edit dl rm
error.ipp	3070	0644	edit dl rm
execution_context.hpp	3247	0644	edit dl rm
execution_context.ipp	1801	0644	edit dl rm
executor.hpp	6835	0644	edit dl rm
executor.ipp	1002	0644	edit dl rm
handler_alloc_hook.ipp	1984	0644	edit dl rm
io_context.hpp	13728	0644	edit dl rm
io_context.ipp	4108	0644	edit dl rm
multiple_exceptions.ipp	1280	0644	edit dl rm
post.hpp	7762	0644	edit dl rm
read.hpp	45178	0644	edit dl rm
read_at.hpp	28331	0644	edit dl rm
read_until.hpp	115335	0644	edit dl rm
redirect_error.hpp	12015	0644	edit dl rm
serial_port_base.hpp	1375	0644	edit dl rm
serial_port_base.ipp	13327	0644	edit dl rm
spawn.hpp	15854	0644	edit dl rm
src.hpp	3833	0644	edit dl rm
system_context.hpp	875	0644	edit dl rm
system_context.ipp	2109	0644	edit dl rm
system_executor.hpp	6391	0644	edit dl rm
thread_pool.hpp	10853	0644	edit dl rm
thread_pool.ipp	3132	0644	edit dl rm
use_awaitable.hpp	7244	0644	edit dl rm
use_future.hpp	27610	0644	edit dl rm
write.hpp	41076	0644	edit dl rm
write_at.hpp	24732	0644	edit dl rm

Edit: /usr/include/boost/asio/impl/co_spawn.hpp (8834B)

//
// impl/co_spawn.hpp
// ~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 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_CO_SPAWN_HPP
#define BOOST_ASIO_IMPL_CO_SPAWN_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/awaitable.hpp>
#include <boost/asio/dispatch.hpp>
#include <boost/asio/execution/outstanding_work.hpp>
#include <boost/asio/post.hpp>
#include <boost/asio/prefer.hpp>
#include <boost/asio/use_awaitable.hpp>

#include <boost/asio/detail/push_options.hpp>

namespace boost {
namespace asio {
namespace detail {

template <typename Executor, typename = void>
class co_spawn_work_guard
{
public:
  typedef typename decay<
      typename prefer_result<Executor,
        execution::outstanding_work_t::tracked_t
      >::type
    >::type executor_type;

co_spawn_work_guard(const Executor& ex)
    : executor_(boost::asio::prefer(ex, execution::outstanding_work.tracked))
  {
  }

executor_type get_executor() const BOOST_ASIO_NOEXCEPT
  {
    return executor_;
  }

private:
  executor_type executor_;
};

#if !defined(BOOST_ASIO_NO_TS_EXECUTORS)

template <typename Executor>
struct co_spawn_work_guard<Executor,
    typename enable_if<
      !execution::is_executor<Executor>::value
    >::type> : executor_work_guard<Executor>
{
  co_spawn_work_guard(const Executor& ex)
    : executor_work_guard<Executor>(ex)
  {
  }
};

#endif // !defined(BOOST_ASIO_NO_TS_EXECUTORS)

template <typename Executor>
inline co_spawn_work_guard<Executor>
make_co_spawn_work_guard(const Executor& ex)
{
  return co_spawn_work_guard<Executor>(ex);
}

template <typename T, typename Executor, typename F, typename Handler>
awaitable<void, Executor> co_spawn_entry_point(
    awaitable<T, Executor>*, Executor ex, F f, Handler handler)
{
  auto spawn_work = make_co_spawn_work_guard(ex);
  auto handler_work = make_co_spawn_work_guard(
      boost::asio::get_associated_executor(handler, ex));

(void) co_await (post)(spawn_work.get_executor(),
      use_awaitable_t<Executor>{});

bool done = false;
  try
  {
    T t = co_await f();

done = true;

(dispatch)(handler_work.get_executor(),
        [handler = std::move(handler), t = std::move(t)]() mutable
        {
          handler(std::exception_ptr(), std::move(t));
        });
  }
  catch (...)
  {
    if (done)
      throw;

(dispatch)(handler_work.get_executor(),
        [handler = std::move(handler), e = std::current_exception()]() mutable
        {
          handler(e, T());
        });
  }
}

template <typename Executor, typename F, typename Handler>
awaitable<void, Executor> co_spawn_entry_point(
    awaitable<void, Executor>*, Executor ex, F f, Handler handler)
{
  auto spawn_work = make_co_spawn_work_guard(ex);
  auto handler_work = make_co_spawn_work_guard(
      boost::asio::get_associated_executor(handler, ex));

(void) co_await (post)(spawn_work.get_executor(),
      use_awaitable_t<Executor>{__FILE__, __LINE__, "co_spawn_entry_point"});

std::exception_ptr e = nullptr;
  try
  {
    co_await f();
  }
  catch (...)
  {
    e = std::current_exception();
  }

(dispatch)(handler_work.get_executor(),
      [handler = std::move(handler), e]() mutable
      {
        handler(e);
      });
}

template <typename T, typename Executor>
class awaitable_as_function
{
public:
  explicit awaitable_as_function(awaitable<T, Executor>&& a)
    : awaitable_(std::move(a))
  {
  }

awaitable<T, Executor> operator()()
  {
    return std::move(awaitable_);
  }

private:
  awaitable<T, Executor> awaitable_;
};

template <typename Executor>
class initiate_co_spawn
{
public:
  typedef Executor executor_type;

template <typename OtherExecutor>
  explicit initiate_co_spawn(const OtherExecutor& ex)
    : ex_(ex)
  {
  }

executor_type get_executor() const BOOST_ASIO_NOEXCEPT
  {
    return ex_;
  }

template <typename Handler, typename F>
  void operator()(Handler&& handler, F&& f) const
  {
    typedef typename result_of<F()>::type awaitable_type;

auto a = (co_spawn_entry_point)(static_cast<awaitable_type*>(nullptr),
        ex_, std::forward<F>(f), std::forward<Handler>(handler));
    awaitable_handler<executor_type, void>(std::move(a), ex_).launch();
  }

private:
  Executor ex_;
};

} // namespace detail

template <typename Executor, typename T, typename AwaitableExecutor,
    BOOST_ASIO_COMPLETION_TOKEN_FOR(
      void(std::exception_ptr, T)) CompletionToken>
inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(
    CompletionToken, void(std::exception_ptr, T))
co_spawn(const Executor& ex,
    awaitable<T, AwaitableExecutor> a, CompletionToken&& token,
    typename enable_if<
      (is_executor<Executor>::value || execution::is_executor<Executor>::value)
        && is_convertible<Executor, AwaitableExecutor>::value
    >::type*)
{
  return async_initiate<CompletionToken, void(std::exception_ptr, T)>(
      detail::initiate_co_spawn<AwaitableExecutor>(AwaitableExecutor(ex)),
      token, detail::awaitable_as_function<T, AwaitableExecutor>(std::move(a)));
}

template <typename Executor, typename AwaitableExecutor,
    BOOST_ASIO_COMPLETION_TOKEN_FOR(
      void(std::exception_ptr)) CompletionToken>
inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(
    CompletionToken, void(std::exception_ptr))
co_spawn(const Executor& ex,
    awaitable<void, AwaitableExecutor> a, CompletionToken&& token,
    typename enable_if<
      (is_executor<Executor>::value || execution::is_executor<Executor>::value)
        && is_convertible<Executor, AwaitableExecutor>::value
    >::type*)
{
  return async_initiate<CompletionToken, void(std::exception_ptr)>(
      detail::initiate_co_spawn<AwaitableExecutor>(AwaitableExecutor(ex)),
      token, detail::awaitable_as_function<
        void, AwaitableExecutor>(std::move(a)));
}

template <typename ExecutionContext, typename T, typename AwaitableExecutor,
    BOOST_ASIO_COMPLETION_TOKEN_FOR(
      void(std::exception_ptr, T)) CompletionToken>
inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(
    CompletionToken, void(std::exception_ptr, T))
co_spawn(ExecutionContext& ctx,
    awaitable<T, AwaitableExecutor> a, CompletionToken&& token,
    typename enable_if<
      is_convertible<ExecutionContext&, execution_context&>::value
        && is_convertible<typename ExecutionContext::executor_type,
          AwaitableExecutor>::value
    >::type*)
{
  return (co_spawn)(ctx.get_executor(), std::move(a),
      std::forward<CompletionToken>(token));
}

template <typename ExecutionContext, typename AwaitableExecutor,
    BOOST_ASIO_COMPLETION_TOKEN_FOR(
      void(std::exception_ptr)) CompletionToken>
inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(
    CompletionToken, void(std::exception_ptr))
co_spawn(ExecutionContext& ctx,
    awaitable<void, AwaitableExecutor> a, CompletionToken&& token,
    typename enable_if<
      is_convertible<ExecutionContext&, execution_context&>::value
        && is_convertible<typename ExecutionContext::executor_type,
          AwaitableExecutor>::value
    >::type*)
{
  return (co_spawn)(ctx.get_executor(), std::move(a),
      std::forward<CompletionToken>(token));
}

template <typename Executor, typename F,
    BOOST_ASIO_COMPLETION_TOKEN_FOR(typename detail::awaitable_signature<
      typename result_of<F()>::type>::type) CompletionToken>
inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken,
    typename detail::awaitable_signature<typename result_of<F()>::type>::type)
co_spawn(const Executor& ex, F&& f, CompletionToken&& token,
    typename enable_if<
      is_executor<Executor>::value || execution::is_executor<Executor>::value
    >::type*)
{
  return async_initiate<CompletionToken,
    typename detail::awaitable_signature<typename result_of<F()>::type>::type>(
      detail::initiate_co_spawn<
        typename result_of<F()>::type::executor_type>(ex),
      token, std::forward<F>(f));
}

template <typename ExecutionContext, typename F,
    BOOST_ASIO_COMPLETION_TOKEN_FOR(typename detail::awaitable_signature<
      typename result_of<F()>::type>::type) CompletionToken>
inline BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken,
    typename detail::awaitable_signature<typename result_of<F()>::type>::type)
co_spawn(ExecutionContext& ctx, F&& f, CompletionToken&& token,
    typename enable_if<
      is_convertible<ExecutionContext&, execution_context&>::value
    >::type*)
{
  return (co_spawn)(ctx.get_executor(), std::forward<F>(f),
      std::forward<CompletionToken>(token));
}

} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>

#endif // BOOST_ASIO_IMPL_CO_SPAWN_HPP

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