18d2b4d5aa
Declare variadic when_all_ready() as forced-inline to avoid it returning a reference to a when_all_read_task object allocated in the stack-frame of when_all_ready().
57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Copyright (c) Lewis Baker
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// Licenced under MIT license. See LICENSE.txt for details.
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///////////////////////////////////////////////////////////////////////////////
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#ifndef CPPCORO_WHEN_ALL_READY_HPP_INCLUDED
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#define CPPCORO_WHEN_ALL_READY_HPP_INCLUDED
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#include <cppcoro/config.hpp>
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#include <cppcoro/awaitable_traits.hpp>
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#include <cppcoro/is_awaitable.hpp>
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#include <cppcoro/detail/when_all_ready_awaitable.hpp>
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#include <cppcoro/detail/when_all_task.hpp>
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#include <cppcoro/detail/unwrap_reference.hpp>
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#include <tuple>
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#include <utility>
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#include <vector>
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#include <type_traits>
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namespace cppcoro
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{
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template<
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typename... AWAITABLES,
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std::enable_if_t<std::conjunction_v<
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is_awaitable<detail::unwrap_reference_t<std::remove_reference_t<AWAITABLES>>>...>, int> = 0>
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[[nodiscard]]
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CPPCORO_FORCE_INLINE auto when_all_ready(AWAITABLES&&... awaitables)
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{
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return detail::when_all_ready_awaitable<std::tuple<detail::when_all_task<
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typename awaitable_traits<detail::unwrap_reference_t<std::remove_reference_t<AWAITABLES>>>::await_result_t>...>>(
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std::make_tuple(detail::make_when_all_task(std::forward<AWAITABLES>(awaitables))...));
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}
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// TODO: Generalise this from vector<AWAITABLE> to arbitrary sequence of awaitable.
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template<
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typename AWAITABLE,
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typename RESULT = typename awaitable_traits<detail::unwrap_reference_t<AWAITABLE>>::await_result_t>
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[[nodiscard]] auto when_all_ready(std::vector<AWAITABLE> awaitables)
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{
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std::vector<detail::when_all_task<RESULT>> tasks;
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tasks.reserve(awaitables.size());
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for (auto& awaitable : awaitables)
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{
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tasks.emplace_back(detail::make_when_all_task(std::move(awaitable)));
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}
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return detail::when_all_ready_awaitable<std::vector<detail::when_all_task<RESULT>>>(
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std::move(tasks));
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}
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}
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#endif
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