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1e751d7dbf
- Change some doc references from 'algorithm' to 'sched_algorithm'. - Initial cut at supporting arbitrary user-coded scheduler properties. - Set fiber_properties::sched_algo_ every time through awakened(). - Define sched_algorithm methods on fiber_base*, not worker_fiber*. - Simplify detail::fifo by making tail_ point to last link pointer. - Reimplement waiting_queue::push() using pointer-to-pointer trick. - Reimplement waiting_queue::move_to() using fiber_base** scan. - Make bounded_queue::tail_ a ptr* to simplify appending new nodes. - Make unbounded_queue::tail_ a ptr* to simplify linking new nodes. - Remove thread_affinity flag and access methods. - Re-add thread_affinity specific to workstealing_round_robin. - Remove 'priority' for every fiber, and its support methods.
67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
// Copyright Oliver Kowalke 2013.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef WORKSTEALING_ROUND_ROBIN_H
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#define WORKSTEALING_ROUND_ROBIN_H
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#include <deque>
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#include <boost/config.hpp>
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#include <boost/thread/mutex.hpp>
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#include <boost/fiber/fiber.hpp>
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#include <boost/fiber/properties.hpp>
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_PREFIX
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#endif
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# if defined(BOOST_MSVC)
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# pragma warning(push)
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# pragma warning(disable:4251 4275)
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# endif
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struct affinity: public boost::fibers::fiber_properties
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{
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affinity(boost::fibers::fiber_properties::back_ptr p):
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fiber_properties(p),
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// By default, assume a given fiber CAN migrate to another thread.
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thread_affinity(false)
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{}
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bool thread_affinity;
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};
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class workstealing_round_robin :
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public boost::fibers::sched_algorithm_with_properties<affinity>
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{
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private:
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boost::mutex mtx_;
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// We should package these as a queue class. Better yet, we should
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// refactor one of our existing (intrusive) queue classes to support the
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// required operations generically. But for now...
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boost::fibers::fiber_base *rhead_, **rtail_;
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public:
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workstealing_round_robin();
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virtual void awakened( boost::fibers::fiber_base *);
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virtual boost::fibers::fiber_base * pick_next();
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boost::fibers::fiber steal();
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};
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# if defined(BOOST_MSVC)
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# pragma warning(pop)
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# endif
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_SUFFIX
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#endif
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#endif // WORKSTEALING_ROUND_ROBIN_H
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