| 1 | |
|---|---|
| 2 | // Copyright Nat Goodspeed + Oliver Kowalke 2015. |
| 3 | // Distributed under the Boost Software License, Version 1.0. |
| 4 | // (See accompanying file LICENSE_1_0.txt or copy at |
| 5 | // http://www.boost.org/LICENSE_1_0.txt) |
| 6 | |
| 7 | #ifndef BOOST_FIBERS_ALGO_SHARED_WORK_H |
| 8 | #define BOOST_FIBERS_ALGO_SHARED_WORK_H |
| 9 | |
| 10 | #include <condition_variable> |
| 11 | #include <chrono> |
| 12 | #include <deque> |
| 13 | #include <mutex> |
| 14 | |
| 15 | #include <boost/config.hpp> |
| 16 | |
| 17 | #include <boost/fiber/algo/algorithm.hpp> |
| 18 | #include <boost/fiber/context.hpp> |
| 19 | #include <boost/fiber/detail/config.hpp> |
| 20 | #include <boost/fiber/scheduler.hpp> |
| 21 | |
| 22 | #ifdef BOOST_HAS_ABI_HEADERS |
| 23 | # include BOOST_ABI_PREFIX |
| 24 | #endif |
| 25 | |
| 26 | #ifdef _MSC_VER |
| 27 | # pragma warning(push) |
| 28 | # pragma warning(disable:4251) |
| 29 | #endif |
| 30 | |
| 31 | namespace boost { |
| 32 | namespace fibers { |
| 33 | namespace algo { |
| 34 | |
| 35 | class BOOST_FIBERS_DECL shared_work : public algorithm { |
| 36 | private: |
| 37 | typedef std::deque< context * > rqueue_type; |
| 38 | typedef scheduler::ready_queue_type lqueue_type; |
| 39 | |
| 40 | static rqueue_type rqueue_; |
| 41 | static std::mutex rqueue_mtx_; |
| 42 | |
| 43 | lqueue_type lqueue_{}; |
| 44 | std::mutex mtx_{}; |
| 45 | std::condition_variable cnd_{}; |
| 46 | bool flag_{ false }; |
| 47 | bool suspend_{ false }; |
| 48 | |
| 49 | public: |
| 50 | shared_work() = default; |
| 51 | |
| 52 | shared_work( bool suspend) : |
| 53 | suspend_{ suspend } { |
| 54 | } |
| 55 | |
| 56 | shared_work( shared_work const&) = delete; |
| 57 | shared_work( shared_work &&) = delete; |
| 58 | |
| 59 | shared_work & operator=( shared_work const&) = delete; |
| 60 | shared_work & operator=( shared_work &&) = delete; |
| 61 | |
| 62 | void awakened( context * ctx) noexcept override; |
| 63 | |
| 64 | context * pick_next() noexcept override; |
| 65 | |
| 66 | bool has_ready_fibers() const noexcept override { |
| 67 | std::unique_lock< std::mutex > lock{ rqueue_mtx_ }; |
| 68 | return ! rqueue_.empty() || ! lqueue_.empty(); |
| 69 | } |
| 70 | |
| 71 | void suspend_until( std::chrono::steady_clock::time_point const& time_point) noexcept override; |
| 72 | |
| 73 | void notify() noexcept override; |
| 74 | }; |
| 75 | |
| 76 | }}} |
| 77 | |
| 78 | #ifdef _MSC_VER |
| 79 | # pragma warning(pop) |
| 80 | #endif |
| 81 | |
| 82 | #ifdef BOOST_HAS_ABI_HEADERS |
| 83 | # include BOOST_ABI_SUFFIX |
| 84 | #endif |
| 85 | |
| 86 | #endif // BOOST_FIBERS_ALGO_SHARED_WORK_H |
| 87 |