boost/fiber/algo/shared_work.hpp

//          Copyright Nat Goodspeed + Oliver Kowalke 2015.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_FIBERS_ALGO_SHARED_WORK_H
#define BOOST_FIBERS_ALGO_SHARED_WORK_H
#include <condition_variable>
#include <chrono>
#include <deque>
#include <mutex>
#include <boost/config.hpp>
#include <boost/fiber/algo/algorithm.hpp>
#include <boost/fiber/context.hpp>
#include <boost/fiber/detail/config.hpp>
#include <boost/fiber/scheduler.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
#  include BOOST_ABI_PREFIX
#endif
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable:4251)
#endif
namespace boost {
namespace fibers {
namespace algo {
class BOOST_FIBERS_DECL shared_work : public algorithm {
private:
    typedef std::deque< context * >  rqueue_t;
    typedef scheduler::ready_queue_t lqueue_t;
    static rqueue_t     	rqueue_;
    static std::mutex   	rqueue_mtx_;
    lqueue_t            	lqueue_{};
    std::mutex              mtx_{};
    std::condition_variable cnd_{};
    bool                    flag_{ false };
    bool                    suspend_;
public:
    shared_work() = default;
    shared_work( bool suspend) :
        suspend_{ suspend } {
    }
	shared_work( shared_work const&) = delete;
	shared_work( shared_work &&) = delete;
	shared_work & operator=( shared_work const&) = delete;
	shared_work & operator=( shared_work &&) = delete;
    void awakened( context * ctx) noexcept;
    context * pick_next() noexcept;
    bool has_ready_fibers() const noexcept {
        std::unique_lock< std::mutex > lock( rqueue_mtx_);
        return ! rqueue_.empty() || ! lqueue_.empty();
    }
	void suspend_until( std::chrono::steady_clock::time_point const& time_point) noexcept;
	void notify() noexcept;
};
}}}
#ifdef _MSC_VER
# pragma warning(pop)
#endif
#ifdef BOOST_HAS_ABI_HEADERS
#  include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_FIBERS_ALGO_SHARED_WORK_H