include/boost/capy/detail/run.hpp
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| Line | TLA | Hits | Source Code |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com) | ||
| 3 | // Copyright (c) 2026 Michael Vandeberg | ||
| 4 | // | ||
| 5 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 6 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 7 | // | ||
| 8 | // Official repository: https://github.com/cppalliance/capy | ||
| 9 | // | ||
| 10 | |||
| 11 | #ifndef BOOST_CAPY_DETAIL_RUN_HPP | ||
| 12 | #define BOOST_CAPY_DETAIL_RUN_HPP | ||
| 13 | |||
| 14 | #include <boost/capy/detail/config.hpp> | ||
| 15 | #include <boost/capy/detail/frame_memory_resource.hpp> | ||
| 16 | |||
| 17 | #include <concepts> | ||
| 18 | #include <coroutine> | ||
| 19 | #include <cstddef> | ||
| 20 | #include <memory_resource> | ||
| 21 | |||
| 22 | namespace boost { | ||
| 23 | namespace capy { | ||
| 24 | namespace detail { | ||
| 25 | |||
| 26 | // A runnable that a stop ends by abandonment (quitter): its promise | ||
| 27 | // says what it delivers instead of its own result, and gives the | ||
| 28 | // handle a launcher resumes to start it. | ||
| 29 | template<class Task> | ||
| 30 | concept stops_by_abandonment = requires(typename Task::promise_type& p) { | ||
| 31 | Task::promise_type::stopped_result(); | ||
| 32 | { p.launch_handle() } -> std::convertible_to<std::coroutine_handle<>>; | ||
| 33 | }; | ||
| 34 | |||
| 35 | /// Concept for standard Allocator types. | ||
| 36 | template<class A> | ||
| 37 | concept Allocator = requires(A a, std::size_t n) { | ||
| 38 | typename A::value_type; | ||
| 39 | { a.allocate(n) } -> std::same_as<typename A::value_type*>; | ||
| 40 | }; | ||
| 41 | |||
| 42 | /// Specialization for memory_resource* - stores pointer directly. | ||
| 43 | template<> | ||
| 44 | class frame_memory_resource<std::pmr::memory_resource*> | ||
| 45 | { | ||
| 46 | std::pmr::memory_resource* mr_; | ||
| 47 | |||
| 48 | public: | ||
| 49 | 17x | explicit frame_memory_resource(std::pmr::memory_resource* mr) noexcept | |
| 50 | 17x | : mr_(mr) | |
| 51 | { | ||
| 52 | 17x | } | |
| 53 | |||
| 54 | 17x | std::pmr::memory_resource* get() noexcept { return mr_; } | |
| 55 | }; | ||
| 56 | |||
| 57 | /// Specialization for void - no allocator (empty). | ||
| 58 | template<> | ||
| 59 | class frame_memory_resource<void> | ||
| 60 | { | ||
| 61 | public: | ||
| 62 | frame_memory_resource() = default; | ||
| 63 | |||
| 64 | std::pmr::memory_resource* get() noexcept { return nullptr; } | ||
| 65 | }; | ||
| 66 | |||
| 67 | } // namespace detail | ||
| 68 | } // namespace capy | ||
| 69 | } // namespace boost | ||
| 70 | |||
| 71 | #endif | ||
| 72 |