folly::coro::detail::TaskPromiseBase Class Reference

#include <Task.h>

Inheritance diagram for folly::coro::detail::TaskPromiseBase:

Classes
class	FinalAwaiter

Public Member Functions
std::experimental::suspend_always	initial_suspend () noexcept
FinalAwaiter	final_suspend () noexcept
template<typename U >
auto	await_transform (Task< U > &&t) noexcept
template<typename Awaitable >
auto	await_transform (Awaitable &&awaitable) noexcept
auto	await_transform (folly::coro::getCurrentExecutor) noexcept
template<typename T >
auto	await_transform (Task< T > &&t) noexcept

Protected Member Functions
	TaskPromiseBase () noexcept

Private Attributes
std::experimental::coroutine_handle	continuation_
folly::Executor *	executor_

Friends
class	FinalAwaiter
template<typename T >
class	folly::coro::TaskWithExecutor
template<typename T >
class	folly::coro::Task

Detailed Description

Definition at line 45 of file Task.h.

Constructor & Destructor Documentation

folly::coro::detail::TaskPromiseBase::TaskPromiseBase ( )

inlineprotectednoexcept

Definition at line 65 of file Task.h.

: executor_(nullptr) {}

Member Function Documentation

template<typename U >

auto folly::coro::detail::TaskPromiseBase::await_transform ( Task< U > &&  t )

noexcept

template<typename Awaitable >

auto folly::coro::detail::TaskPromiseBase::await_transform ( Awaitable &&  awaitable )

inlinenoexcept

Definition at line 80 of file Task.h.

References folly::coro::co_viaIfAsync().

                                                       {
    using folly::coro::co_viaIfAsync;
    return co_viaIfAsync(executor_, static_cast<Awaitable&&>(awaitable));
  }

auto folly::coro::detail::TaskPromiseBase::await_transform ( folly::coro::getCurrentExecutor  )

inlinenoexcept

Definition at line 85 of file Task.h.

                                                             {
    return AwaitableReady<folly::Executor*>{executor_};
  }

template<typename T >

auto folly::coro::detail::TaskPromiseBase::await_transform ( Task< T > &&  t )

noexcept

Definition at line 309 of file Task.h.

References destroy(), folly::exchange(), SCOPE_EXIT, and folly::pushmi::detail::t.

                                                                {
  class Awaiter {
    using handle_t =
        std::experimental::coroutine_handle<detail::TaskPromise<T>>;

   public:
    explicit Awaiter(handle_t coro) noexcept : coro_(coro) {}

    Awaiter(Awaiter&& other) noexcept : coro_(std::exchange(other.coro_, {})) {}

    Awaiter(const Awaiter&) = delete;

    ~Awaiter() {
      if (coro_) {
        coro_.destroy();
      }
    }

    bool await_ready() noexcept {
      return false;
    }

    handle_t await_suspend(
        std::experimental::coroutine_handle<> continuation) noexcept {
      coro_.promise().continuation_ = continuation;
      return coro_;
    }

    decltype(auto) await_resume() {
      SCOPE_EXIT {
        std::exchange(coro_, {}).destroy();
      };
      return coro_.promise().getResult();
    }

   private:
    handle_t coro_;
  };

  t.coro_.promise().executor_ = executor_;
  return Awaiter{std::exchange(t.coro_, {})};
}

FinalAwaiter folly::coro::detail::TaskPromiseBase::final_suspend ( )

inlinenoexcept

Definition at line 72 of file Task.h.

References folly::pushmi::__adl::noexcept(), and folly::pushmi::detail::t.

                                        {
    return {};
  }

std::experimental::suspend_always folly::coro::detail::TaskPromiseBase::initial_suspend ( )

inlinenoexcept

Definition at line 68 of file Task.h.

                                                           {
    return {};
  }

Friends And Related Function Documentation

friend class FinalAwaiter

friend

Definition at line 62 of file Task.h.

template<typename T >

friend class folly::coro::Task

friend

Definition at line 94 of file Task.h.

template<typename T >

friend class folly::coro::TaskWithExecutor

friend

Definition at line 91 of file Task.h.

Member Data Documentation

std::experimental::coroutine_handle folly::coro::detail::TaskPromiseBase::continuation_

private

Definition at line 96 of file Task.h.

Referenced by folly::coro::detail::TaskPromiseBase::FinalAwaiter::await_suspend().

folly::Executor* folly::coro::detail::TaskPromiseBase::executor_

private

Definition at line 97 of file Task.h.

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The documentation for this class was generated from the following file:

• proxygen/folly/folly/experimental/coro/Task.h