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402a4353f7
Some reviewers disliked that to build a custom sched_algorithm subclass, you must necessarily manipulate pointers to classes in the boost::fibers::detail namespace. Redefine all such methods to use fiber_base* rather than detail::worker_fiber*. Hoist fiber_base* into boost::fibers namespace. We considered an opaque typedef rather than fiber_base*, but in fact a sched_algorithm subclass may need is_ready(). Moreover, a sched_algorithm subclass may well want to use an intrusive linked list to queue fibers. Hoist worker_fiber::nxt_ pointer into fiber_base, and remove worker_fiber::next() and next_reset() methods. This allows recasting detail::fifo in terms of fiber_base*, therefore round_robin can be stated almost entirely in terms of fiber_base* rather than worker_fiber*. Recast fiber constructor taking worker_fiber* to take fiber_base* instead. This constructor is used solely for fiber migration; with relevant functions now returning fiber_base*, we think we no longer need fiber(worker_fiber*).
61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
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// 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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#include "workstealing_round_robin.hpp"
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#include <boost/assert.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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void
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workstealing_round_robin::awakened( boost::fibers::fiber_base * f)
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{
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boost::mutex::scoped_lock lk( mtx_);
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rqueue_.push_back( f);
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}
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boost::fibers::fiber_base *
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workstealing_round_robin::pick_next()
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{
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boost::mutex::scoped_lock lk( mtx_);
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boost::fibers::fiber_base * f = 0;
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if ( ! rqueue_.empty() )
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{
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f = rqueue_.front();
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rqueue_.pop_front();
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}
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return f;
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}
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void
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workstealing_round_robin::priority( boost::fibers::fiber_base * f, int prio) BOOST_NOEXCEPT
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{
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BOOST_ASSERT( f);
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// set only priority to fiber
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// round-robin does not respect priorities
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static_cast<boost::fibers::detail::worker_fiber*>(f)->priority( prio);
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}
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boost::fibers::fiber
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workstealing_round_robin::steal() BOOST_NOEXCEPT
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{
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boost::mutex::scoped_lock lk( mtx_);
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boost::fibers::fiber_base * f = 0;
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if ( ! rqueue_.empty() )
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{
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f = rqueue_.back();
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rqueue_.pop_back();
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}
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return boost::fibers::fiber( f);
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}
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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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