93 lines
2.8 KiB
C++
93 lines
2.8 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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#ifndef BOOST_THIS_FIBER_OPERATIONS_H
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#define BOOST_THIS_FIBER_OPERATIONS_H
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#include <chrono>
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#include <boost/config.hpp>
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#include <boost/fiber/context.hpp>
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#include <boost/fiber/detail/config.hpp>
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#include <boost/fiber/detail/convert.hpp>
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#include <boost/fiber/fiber.hpp>
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#include <boost/fiber/scheduler.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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namespace boost {
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namespace this_fiber {
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inline
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fibers::fiber::id get_id() noexcept {
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return fibers::context::active()->get_id();
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}
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inline
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void yield() noexcept {
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fibers::context::active()->yield();
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}
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template< typename Clock, typename Duration >
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void sleep_until( std::chrono::time_point< Clock, Duration > const& sleep_time_) {
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std::chrono::steady_clock::time_point sleep_time(
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boost::fibers::detail::convert( sleep_time_) );
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fibers::context::active()->wait_until( sleep_time);
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}
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template< typename Rep, typename Period >
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void sleep_for( std::chrono::duration< Rep, Period > const& timeout_duration) {
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fibers::context::active()->wait_until(
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std::chrono::steady_clock::now() + timeout_duration);
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}
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template< typename PROPS >
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PROPS & properties() {
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fibers::fiber_properties * props =
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fibers::context::active()->get_properties();
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if ( ! props) {
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// props could be nullptr if the thread's main fiber has not yet
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// yielded (not yet passed through algorithm_with_properties::
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// awakened()). Address that by yielding right now.
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yield();
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// Try again to obtain the fiber_properties subclass instance ptr.
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// Walk through the whole chain again because who knows WHAT might
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// have happened while we were yielding!
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props = fibers::context::active()->get_properties();
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// Could still be hosed if the running manager isn't a subclass of
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// algorithm_with_properties.
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BOOST_ASSERT_MSG(props, "this_fiber::properties not set");
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}
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return dynamic_cast< PROPS & >( * props );
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}
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}
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namespace fibers {
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inline
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bool has_ready_fibers() noexcept {
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return boost::fibers::context::active()->get_scheduler()->has_ready_fibers();
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}
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template< typename SchedAlgo, typename ... Args >
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void use_scheduling_algorithm( Args && ... args) noexcept {
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boost::fibers::context::active()->get_scheduler()
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->set_algo(
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std::unique_ptr< SchedAlgo >(
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new SchedAlgo( std::forward< Args >( args) ... ) ) );
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}
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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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#endif // BOOST_THIS_FIBER_OPERATIONS_H
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