89 lines
1.9 KiB
C++
89 lines
1.9 KiB
C++
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#ifndef BOOST_FIBERS_WAKER_H
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#define BOOST_FIBERS_WAKER_H
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#include <cstddef>
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#include <boost/config.hpp>
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#include <boost/fiber/detail/config.hpp>
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#include <boost/fiber/detail/spinlock.hpp>
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#include <boost/intrusive/slist.hpp>
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namespace boost {
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namespace fibers {
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class context;
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namespace detail {
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typedef intrusive::slist_member_hook<> waker_queue_hook;
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} // detail
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class BOOST_FIBERS_DECL waker {
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private:
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context *ctx_{};
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size_t epoch_{};
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public:
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friend class context;
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waker() = default;
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waker(context * ctx, const size_t epoch)
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: ctx_{ ctx }
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, epoch_{ epoch }
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{}
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bool wake() const noexcept;
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};
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class BOOST_FIBERS_DECL waker_with_hook : public waker {
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public:
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explicit waker_with_hook(waker && w)
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: waker{ std::move(w) }
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{}
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bool is_linked() const noexcept {
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return waker_queue_hook_.is_linked();
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}
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friend bool
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operator==( waker const& lhs, waker const& rhs) noexcept {
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return & lhs == & rhs;
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}
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public:
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detail::waker_queue_hook waker_queue_hook_{};
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};
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namespace detail {
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typedef intrusive::slist<
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waker_with_hook,
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intrusive::member_hook<
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waker_with_hook, detail::waker_queue_hook, & waker_with_hook::waker_queue_hook_ >,
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intrusive::constant_time_size< false >,
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intrusive::cache_last< true >
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> waker_slist_t;
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}
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class BOOST_FIBERS_DECL wait_queue {
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private:
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detail::waker_slist_t slist_{};
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public:
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void suspend_and_wait( detail::spinlock_lock &, context *);
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bool suspend_and_wait_until( detail::spinlock_lock &,
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context *,
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std::chrono::steady_clock::time_point const&);
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void notify_one();
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void notify_all();
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bool empty() const;
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};
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}}
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#endif // BOOST_FIBERS_WAKER_H
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