include/boost/capy/detail/service_slot.hpp
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unsigned long boost::capy::detail::service_slot<boost::capy::(anonymous namespace)::test_service>()
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unsigned long boost::capy::detail::service_slot<boost::capy::detail::strand_service_impl>()
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unsigned long boost::capy::detail::service_slot<boost::capy::detail::timer_service>()
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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/capy | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_CAPY_DETAIL_SERVICE_SLOT_HPP | ||
| 11 | #define BOOST_CAPY_DETAIL_SERVICE_SLOT_HPP | ||
| 12 | |||
| 13 | #include <atomic> | ||
| 14 | #include <cstddef> | ||
| 15 | |||
| 16 | namespace boost { | ||
| 17 | namespace capy { | ||
| 18 | namespace detail { | ||
| 19 | |||
| 20 | /* Slot ID infrastructure for O(1) service lookup. | ||
| 21 | |||
| 22 | Each distinct service type T gets a unique integer index via | ||
| 23 | service_slot<T>(). The index is assigned on first call from a | ||
| 24 | global atomic counter and cached in a function-local static. | ||
| 25 | Cross-DLL safety relies on COMDAT deduplication (same mechanism | ||
| 26 | as type_id_impl<T>::tag). | ||
| 27 | */ | ||
| 28 | |||
| 29 | inline std::atomic<std::size_t> next_service_slot{0}; | ||
| 30 | |||
| 31 | template<class T> | ||
| 32 | std::size_t | ||
| 33 | 259x | service_slot() noexcept | |
| 34 | { | ||
| 35 | 259x | static const std::size_t id = | |
| 36 | 16x | next_service_slot.fetch_add(1, std::memory_order_relaxed); | |
| 37 | 259x | return id; | |
| 38 | } | ||
| 39 | |||
| 40 | } // namespace detail | ||
| 41 | } // namespace capy | ||
| 42 | } // namespace boost | ||
| 43 | |||
| 44 | #endif | ||
| 45 |