267 lines
8.2 KiB
C++
267 lines
8.2 KiB
C++
#ifndef BOOST_THREAD_PTHREAD_CONDITION_VARIABLE_FWD_HPP
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#define BOOST_THREAD_PTHREAD_CONDITION_VARIABLE_FWD_HPP
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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// (C) Copyright 2007-8 Anthony Williams
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// (C) Copyright 2011-2012 Vicente J. Botet Escriba
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#include <boost/assert.hpp>
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#include <boost/throw_exception.hpp>
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#include <pthread.h>
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#include <boost/thread/cv_status.hpp>
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#include <boost/thread/mutex.hpp>
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#include <boost/thread/lock_types.hpp>
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#include <boost/thread/thread_time.hpp>
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#include <boost/thread/pthread/timespec.hpp>
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#if defined BOOST_THREAD_USES_DATETIME
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#include <boost/thread/xtime.hpp>
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#endif
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#ifdef BOOST_THREAD_USES_CHRONO
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#include <boost/chrono/system_clocks.hpp>
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#include <boost/chrono/ceil.hpp>
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#endif
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#include <boost/thread/detail/delete.hpp>
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#include <boost/date_time/posix_time/posix_time_duration.hpp>
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#include <boost/config/abi_prefix.hpp>
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namespace boost
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{
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class condition_variable
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{
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private:
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#if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
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pthread_mutex_t internal_mutex;
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#endif
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pthread_cond_t cond;
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public:
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//private: // used by boost::thread::try_join_until
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inline bool do_wait_until(
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unique_lock<mutex>& lock,
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struct timespec const &timeout);
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bool do_wait_for(
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unique_lock<mutex>& lock,
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struct timespec const &timeout)
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{
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return do_wait_until(lock, boost::detail::timespec_plus(timeout, boost::detail::timespec_now()));
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}
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public:
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BOOST_THREAD_NO_COPYABLE(condition_variable)
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condition_variable()
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{
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#if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
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int const res=pthread_mutex_init(&internal_mutex,NULL);
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if(res)
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{
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boost::throw_exception(thread_resource_error(res, "boost::condition_variable::condition_variable() constructor failed in pthread_mutex_init"));
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}
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#endif
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int const res2=pthread_cond_init(&cond,NULL);
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if(res2)
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{
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#if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
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BOOST_VERIFY(!pthread_mutex_destroy(&internal_mutex));
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#endif
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boost::throw_exception(thread_resource_error(res2, "boost::condition_variable::condition_variable() constructor failed in pthread_cond_init"));
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}
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}
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~condition_variable()
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{
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int ret;
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#if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
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do {
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ret = pthread_mutex_destroy(&internal_mutex);
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} while (ret == EINTR);
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BOOST_ASSERT(!ret);
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#endif
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do {
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ret = pthread_cond_destroy(&cond);
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} while (ret == EINTR);
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BOOST_ASSERT(!ret);
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}
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void wait(unique_lock<mutex>& m);
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template<typename predicate_type>
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void wait(unique_lock<mutex>& m,predicate_type pred)
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{
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while(!pred()) wait(m);
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}
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#if defined BOOST_THREAD_USES_DATETIME
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inline bool timed_wait(
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unique_lock<mutex>& m,
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boost::system_time const& abs_time)
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{
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#if defined BOOST_THREAD_WAIT_BUG
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struct timespec const timeout=detail::to_timespec(abs_time + BOOST_THREAD_WAIT_BUG);
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return do_wait_until(m, timeout);
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#else
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struct timespec const timeout=detail::to_timespec(abs_time);
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return do_wait_until(m, timeout);
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#endif
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}
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bool timed_wait(
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unique_lock<mutex>& m,
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xtime const& abs_time)
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{
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return timed_wait(m,system_time(abs_time));
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}
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template<typename duration_type>
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bool timed_wait(
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unique_lock<mutex>& m,
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duration_type const& wait_duration)
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{
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return timed_wait(m,get_system_time()+wait_duration);
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}
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template<typename predicate_type>
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bool timed_wait(
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unique_lock<mutex>& m,
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boost::system_time const& abs_time,predicate_type pred)
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{
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while (!pred())
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{
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if(!timed_wait(m, abs_time))
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return pred();
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}
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return true;
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}
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template<typename predicate_type>
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bool timed_wait(
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unique_lock<mutex>& m,
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xtime const& abs_time,predicate_type pred)
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{
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return timed_wait(m,system_time(abs_time),pred);
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}
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template<typename duration_type,typename predicate_type>
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bool timed_wait(
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unique_lock<mutex>& m,
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duration_type const& wait_duration,predicate_type pred)
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{
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return timed_wait(m,get_system_time()+wait_duration,pred);
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}
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#endif
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#ifdef BOOST_THREAD_USES_CHRONO
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template <class Duration>
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cv_status
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wait_until(
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unique_lock<mutex>& lock,
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const chrono::time_point<chrono::system_clock, Duration>& t)
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{
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using namespace chrono;
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typedef time_point<system_clock, nanoseconds> nano_sys_tmpt;
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wait_until(lock,
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nano_sys_tmpt(ceil<nanoseconds>(t.time_since_epoch())));
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return system_clock::now() < t ? cv_status::no_timeout :
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cv_status::timeout;
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}
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template <class Clock, class Duration>
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cv_status
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wait_until(
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unique_lock<mutex>& lock,
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const chrono::time_point<Clock, Duration>& t)
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{
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using namespace chrono;
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system_clock::time_point s_now = system_clock::now();
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typename Clock::time_point c_now = Clock::now();
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wait_until(lock, s_now + ceil<nanoseconds>(t - c_now));
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return Clock::now() < t ? cv_status::no_timeout : cv_status::timeout;
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}
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template <class Clock, class Duration, class Predicate>
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bool
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wait_until(
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unique_lock<mutex>& lock,
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const chrono::time_point<Clock, Duration>& t,
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Predicate pred)
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{
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while (!pred())
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{
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if (wait_until(lock, t) == cv_status::timeout)
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return pred();
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}
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return true;
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}
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template <class Rep, class Period>
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cv_status
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wait_for(
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unique_lock<mutex>& lock,
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const chrono::duration<Rep, Period>& d)
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{
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using namespace chrono;
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system_clock::time_point s_now = system_clock::now();
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steady_clock::time_point c_now = steady_clock::now();
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wait_until(lock, s_now + ceil<nanoseconds>(d));
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return steady_clock::now() - c_now < d ? cv_status::no_timeout :
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cv_status::timeout;
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}
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template <class Rep, class Period, class Predicate>
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bool
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wait_for(
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unique_lock<mutex>& lock,
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const chrono::duration<Rep, Period>& d,
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Predicate pred)
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{
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return wait_until(lock, chrono::steady_clock::now() + d, boost::move(pred));
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// while (!pred())
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// {
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// if (wait_for(lock, d) == cv_status::timeout)
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// return pred();
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// }
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// return true;
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}
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#endif
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#define BOOST_THREAD_DEFINES_CONDITION_VARIABLE_NATIVE_HANDLE
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typedef pthread_cond_t* native_handle_type;
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native_handle_type native_handle()
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{
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return &cond;
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}
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void notify_one() BOOST_NOEXCEPT;
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void notify_all() BOOST_NOEXCEPT;
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#ifdef BOOST_THREAD_USES_CHRONO
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inline cv_status wait_until(
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unique_lock<mutex>& lk,
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chrono::time_point<chrono::system_clock, chrono::nanoseconds> tp)
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{
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using namespace chrono;
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nanoseconds d = tp.time_since_epoch();
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timespec ts = boost::detail::to_timespec(d);
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if (do_wait_until(lk, ts)) return cv_status::no_timeout;
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else return cv_status::timeout;
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}
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#endif
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};
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BOOST_THREAD_DECL void notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk);
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}
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#include <boost/config/abi_suffix.hpp>
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#endif
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