598bfd3f
 Hu Chunming
提交_GLIBCXX_USE_CX...
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// Copyright Oliver Kowalke 2013.
// 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_THIS_FIBER_OPERATIONS_H
#define BOOST_THIS_FIBER_OPERATIONS_H
#include <chrono>
#include <boost/config.hpp>
#include <boost/fiber/algo/algorithm.hpp>
#include <boost/fiber/context.hpp>
#include <boost/fiber/detail/config.hpp>
#include <boost/fiber/detail/convert.hpp>
#include <boost/fiber/fiber.hpp>
#include <boost/fiber/scheduler.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace this_fiber {
inline
fibers::fiber::id get_id() noexcept {
return fibers::context::active()->get_id();
}
inline
void yield() noexcept {
fibers::context::active()->yield();
}
template< typename Clock, typename Duration >
void sleep_until( std::chrono::time_point< Clock, Duration > const& sleep_time_) {
std::chrono::steady_clock::time_point sleep_time = boost::fibers::detail::convert( sleep_time_);
fibers::context * active_ctx = fibers::context::active();
active_ctx->wait_until( sleep_time);
}
template< typename Rep, typename Period >
void sleep_for( std::chrono::duration< Rep, Period > const& timeout_duration) {
fibers::context * active_ctx = fibers::context::active();
active_ctx->wait_until( std::chrono::steady_clock::now() + timeout_duration);
}
template< typename PROPS >
PROPS & properties() {
fibers::fiber_properties * props = fibers::context::active()->get_properties();
if ( BOOST_LIKELY( nullptr == props) ) {
// props could be nullptr if the thread's main fiber has not yet
// yielded (not yet passed through algorithm_with_properties::
// awakened()). Address that by yielding right now.
yield();
// Try again to obtain the fiber_properties subclass instance ptr.
// Walk through the whole chain again because who knows WHAT might
// have happened while we were yielding!
props = fibers::context::active()->get_properties();
// Could still be hosed if the running manager isn't a subclass of
// algorithm_with_properties.
BOOST_ASSERT_MSG( props, "this_fiber::properties not set");
}
return dynamic_cast< PROPS & >( * props );
}
}
namespace fibers {
inline
bool has_ready_fibers() noexcept {
return boost::fibers::context::active()->get_scheduler()->has_ready_fibers();
}
template< typename SchedAlgo, typename ... Args >
void use_scheduling_algorithm( Args && ... args) noexcept {
boost::fibers::context::active()->get_scheduler()
->set_algo( new SchedAlgo( std::forward< Args >( args) ... ) );
}
}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#endif // BOOST_THIS_FIBER_OPERATIONS_H
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