include/boost/corosio/detail/conditionally_enabled_event.hpp
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boost::corosio::detail::conditionally_enabled_event::conditionally_enabled_event(bool)
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boost::corosio::detail::conditionally_enabled_event::set_enabled(bool)
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boost::corosio::detail::conditionally_enabled_event::notify_one()
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boost::corosio::detail::conditionally_enabled_event::notify_all()
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boost::corosio::detail::conditionally_enabled_event::wait(boost::corosio::detail::conditionally_enabled_mutex::scoped_lock&)
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void boost::corosio::detail::conditionally_enabled_event::wait_for<long, std::ratio<1l, 1000000l> >(boost::corosio::detail::conditionally_enabled_mutex::scoped_lock&, std::chrono::duration<long, std::ratio<1l, 1000000l> > const&)
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| Line | TLA | Hits | Source Code |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2026 Michael Vandeberg | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/cppalliance/corosio | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_COROSIO_DETAIL_CONDITIONALLY_ENABLED_EVENT_HPP | ||
| 11 | #define BOOST_COROSIO_DETAIL_CONDITIONALLY_ENABLED_EVENT_HPP | ||
| 12 | |||
| 13 | #include <boost/corosio/detail/conditionally_enabled_mutex.hpp> | ||
| 14 | |||
| 15 | #include <chrono> | ||
| 16 | #include <condition_variable> | ||
| 17 | |||
| 18 | namespace boost::corosio::detail { | ||
| 19 | |||
| 20 | /* Condition variable wrapper that becomes a no-op when disabled. | ||
| 21 | |||
| 22 | When enabled, notify/wait delegate to an underlying | ||
| 23 | std::condition_variable. When disabled, all operations | ||
| 24 | are no-ops. The wait paths are unreachable in | ||
| 25 | single-threaded mode because the task sentinel prevents | ||
| 26 | the empty-queue state in do_one(). | ||
| 27 | */ | ||
| 28 | class conditionally_enabled_event | ||
| 29 | { | ||
| 30 | std::condition_variable cond_; | ||
| 31 | bool enabled_; | ||
| 32 | |||
| 33 | public: | ||
| 34 | 2253x | explicit conditionally_enabled_event(bool enabled = true) noexcept | |
| 35 | 2253x | : enabled_(enabled) | |
| 36 | { | ||
| 37 | 2253x | } | |
| 38 | |||
| 39 | conditionally_enabled_event(conditionally_enabled_event const&) = delete; | ||
| 40 | conditionally_enabled_event& | ||
| 41 | operator=(conditionally_enabled_event const&) = delete; | ||
| 42 | |||
| 43 | 2241x | void set_enabled(bool v) noexcept | |
| 44 | { | ||
| 45 | 2241x | enabled_ = v; | |
| 46 | 2241x | } | |
| 47 | |||
| 48 | 39x | void notify_one() | |
| 49 | { | ||
| 50 | 39x | if (enabled_) | |
| 51 | 39x | cond_.notify_one(); | |
| 52 | 39x | } | |
| 53 | |||
| 54 | 5100x | void notify_all() | |
| 55 | { | ||
| 56 | 5100x | if (enabled_) | |
| 57 | 5088x | cond_.notify_all(); | |
| 58 | 5100x | } | |
| 59 | |||
| 60 | 8x | void wait(conditionally_enabled_mutex::scoped_lock& lock) | |
| 61 | { | ||
| 62 | 8x | if (enabled_) | |
| 63 | 8x | cond_.wait(lock.underlying()); | |
| 64 | 8x | } | |
| 65 | |||
| 66 | template<class Rep, class Period> | ||
| 67 | 13x | void wait_for( | |
| 68 | conditionally_enabled_mutex::scoped_lock& lock, | ||
| 69 | std::chrono::duration<Rep, Period> const& d) | ||
| 70 | { | ||
| 71 | 13x | if (enabled_) | |
| 72 | 13x | cond_.wait_for(lock.underlying(), d); | |
| 73 | 13x | } | |
| 74 | }; | ||
| 75 | |||
| 76 | } // namespace boost::corosio::detail | ||
| 77 | |||
| 78 | #endif // BOOST_COROSIO_DETAIL_CONDITIONALLY_ENABLED_EVENT_HPP | ||
| 79 |