Chris@16: #ifndef BOOST_THREAD_PTHREAD_CONDITION_VARIABLE_FWD_HPP
Chris@16: #define BOOST_THREAD_PTHREAD_CONDITION_VARIABLE_FWD_HPP
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: // (C) Copyright 2007-8 Anthony Williams
Chris@16: // (C) Copyright 2011-2012 Vicente J. Botet Escriba
Chris@16: 
Chris@16: #include <boost/assert.hpp>
Chris@16: #include <boost/throw_exception.hpp>
Chris@16: #include <pthread.h>
Chris@16: #include <boost/thread/cv_status.hpp>
Chris@16: #include <boost/thread/mutex.hpp>
Chris@16: #include <boost/thread/lock_types.hpp>
Chris@16: #include <boost/thread/thread_time.hpp>
Chris@16: #include <boost/thread/pthread/timespec.hpp>
Chris@16: #if defined BOOST_THREAD_USES_DATETIME
Chris@16: #include <boost/thread/xtime.hpp>
Chris@16: #endif
Chris@16: #ifdef BOOST_THREAD_USES_CHRONO
Chris@16: #include <boost/chrono/system_clocks.hpp>
Chris@16: #include <boost/chrono/ceil.hpp>
Chris@16: #endif
Chris@16: #include <boost/thread/detail/delete.hpp>
Chris@16: #include <boost/date_time/posix_time/posix_time_duration.hpp>
Chris@16: 
Chris@16: #include <boost/config/abi_prefix.hpp>
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16: 
Chris@16:     class condition_variable
Chris@16:     {
Chris@16:     private:
Chris@16: #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
Chris@16:         pthread_mutex_t internal_mutex;
Chris@16: #endif
Chris@16:         pthread_cond_t cond;
Chris@16: 
Chris@16:     public:
Chris@16:     //private: // used by boost::thread::try_join_until
Chris@16: 
Chris@16:         inline bool do_wait_until(
Chris@16:             unique_lock<mutex>& lock,
Chris@16:             struct timespec const &timeout);
Chris@16: 
Chris@16:         bool do_wait_for(
Chris@16:             unique_lock<mutex>& lock,
Chris@16:             struct timespec const &timeout)
Chris@16:         {
Chris@16:           return do_wait_until(lock, boost::detail::timespec_plus(timeout, boost::detail::timespec_now()));
Chris@16:         }
Chris@16: 
Chris@16:     public:
Chris@16:       BOOST_THREAD_NO_COPYABLE(condition_variable)
Chris@16:         condition_variable()
Chris@16:         {
Chris@16: #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
Chris@16:             int const res=pthread_mutex_init(&internal_mutex,NULL);
Chris@16:             if(res)
Chris@16:             {
Chris@16:                 boost::throw_exception(thread_resource_error(res, "boost::condition_variable::condition_variable() constructor failed in pthread_mutex_init"));
Chris@16:             }
Chris@16: #endif
Chris@16:             int const res2=pthread_cond_init(&cond,NULL);
Chris@16:             if(res2)
Chris@16:             {
Chris@16: #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
Chris@16:                 BOOST_VERIFY(!pthread_mutex_destroy(&internal_mutex));
Chris@16: #endif
Chris@16:                 boost::throw_exception(thread_resource_error(res2, "boost::condition_variable::condition_variable() constructor failed in pthread_cond_init"));
Chris@16:             }
Chris@16:         }
Chris@16:         ~condition_variable()
Chris@16:         {
Chris@16:             int ret;
Chris@16: #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
Chris@16:             do {
Chris@16:               ret = pthread_mutex_destroy(&internal_mutex);
Chris@16:             } while (ret == EINTR);
Chris@16:             BOOST_ASSERT(!ret);
Chris@16: #endif
Chris@16:             do {
Chris@16:               ret = pthread_cond_destroy(&cond);
Chris@16:             } while (ret == EINTR);
Chris@16:             BOOST_ASSERT(!ret);
Chris@16:         }
Chris@16: 
Chris@16:         void wait(unique_lock<mutex>& m);
Chris@16: 
Chris@16:         template<typename predicate_type>
Chris@16:         void wait(unique_lock<mutex>& m,predicate_type pred)
Chris@16:         {
Chris@16:             while(!pred()) wait(m);
Chris@16:         }
Chris@16: 
Chris@16: 
Chris@16: #if defined BOOST_THREAD_USES_DATETIME
Chris@16:         inline bool timed_wait(
Chris@16:             unique_lock<mutex>& m,
Chris@16:             boost::system_time const& abs_time)
Chris@16:         {
Chris@16: #if defined BOOST_THREAD_WAIT_BUG
Chris@16:             struct timespec const timeout=detail::to_timespec(abs_time + BOOST_THREAD_WAIT_BUG);
Chris@16:             return do_wait_until(m, timeout);
Chris@16: #else
Chris@16:             struct timespec const timeout=detail::to_timespec(abs_time);
Chris@16:             return do_wait_until(m, timeout);
Chris@16: #endif
Chris@16:         }
Chris@16:         bool timed_wait(
Chris@16:             unique_lock<mutex>& m,
Chris@16:             xtime const& abs_time)
Chris@16:         {
Chris@16:             return timed_wait(m,system_time(abs_time));
Chris@16:         }
Chris@16: 
Chris@16:         template<typename duration_type>
Chris@16:         bool timed_wait(
Chris@16:             unique_lock<mutex>& m,
Chris@16:             duration_type const& wait_duration)
Chris@16:         {
Chris@16:             return timed_wait(m,get_system_time()+wait_duration);
Chris@16:         }
Chris@16: 
Chris@16:         template<typename predicate_type>
Chris@16:         bool timed_wait(
Chris@16:             unique_lock<mutex>& m,
Chris@16:             boost::system_time const& abs_time,predicate_type pred)
Chris@16:         {
Chris@16:             while (!pred())
Chris@16:             {
Chris@16:                 if(!timed_wait(m, abs_time))
Chris@16:                     return pred();
Chris@16:             }
Chris@16:             return true;
Chris@16:         }
Chris@16: 
Chris@16:         template<typename predicate_type>
Chris@16:         bool timed_wait(
Chris@16:             unique_lock<mutex>& m,
Chris@16:             xtime const& abs_time,predicate_type pred)
Chris@16:         {
Chris@16:             return timed_wait(m,system_time(abs_time),pred);
Chris@16:         }
Chris@16: 
Chris@16:         template<typename duration_type,typename predicate_type>
Chris@16:         bool timed_wait(
Chris@16:             unique_lock<mutex>& m,
Chris@16:             duration_type const& wait_duration,predicate_type pred)
Chris@16:         {
Chris@16:             return timed_wait(m,get_system_time()+wait_duration,pred);
Chris@16:         }
Chris@16: #endif
Chris@16: 
Chris@16: #ifdef BOOST_THREAD_USES_CHRONO
Chris@16: 
Chris@16:         template <class Duration>
Chris@16:         cv_status
Chris@16:         wait_until(
Chris@16:                 unique_lock<mutex>& lock,
Chris@16:                 const chrono::time_point<chrono::system_clock, Duration>& t)
Chris@16:         {
Chris@16:           using namespace chrono;
Chris@16:           typedef time_point<system_clock, nanoseconds> nano_sys_tmpt;
Chris@16:           wait_until(lock,
Chris@16:                         nano_sys_tmpt(ceil<nanoseconds>(t.time_since_epoch())));
Chris@16:           return system_clock::now() < t ? cv_status::no_timeout :
Chris@16:                                              cv_status::timeout;
Chris@16:         }
Chris@16: 
Chris@16:         template <class Clock, class Duration>
Chris@16:         cv_status
Chris@16:         wait_until(
Chris@16:                 unique_lock<mutex>& lock,
Chris@16:                 const chrono::time_point<Clock, Duration>& t)
Chris@16:         {
Chris@16:           using namespace chrono;
Chris@16:           system_clock::time_point     s_now = system_clock::now();
Chris@16:           typename Clock::time_point  c_now = Clock::now();
Chris@16:           wait_until(lock, s_now + ceil<nanoseconds>(t - c_now));
Chris@16:           return Clock::now() < t ? cv_status::no_timeout : cv_status::timeout;
Chris@16:         }
Chris@16: 
Chris@16:         template <class Clock, class Duration, class Predicate>
Chris@16:         bool
Chris@16:         wait_until(
Chris@16:                 unique_lock<mutex>& lock,
Chris@16:                 const chrono::time_point<Clock, Duration>& t,
Chris@16:                 Predicate pred)
Chris@16:         {
Chris@16:             while (!pred())
Chris@16:             {
Chris@16:                 if (wait_until(lock, t) == cv_status::timeout)
Chris@16:                     return pred();
Chris@16:             }
Chris@16:             return true;
Chris@16:         }
Chris@16: 
Chris@16: 
Chris@16:         template <class Rep, class Period>
Chris@16:         cv_status
Chris@16:         wait_for(
Chris@16:                 unique_lock<mutex>& lock,
Chris@16:                 const chrono::duration<Rep, Period>& d)
Chris@16:         {
Chris@16:           using namespace chrono;
Chris@16:           system_clock::time_point s_now = system_clock::now();
Chris@16:           steady_clock::time_point c_now = steady_clock::now();
Chris@16:           wait_until(lock, s_now + ceil<nanoseconds>(d));
Chris@16:           return steady_clock::now() - c_now < d ? cv_status::no_timeout :
Chris@16:                                                    cv_status::timeout;
Chris@16: 
Chris@16:         }
Chris@16: 
Chris@16: 
Chris@16:         template <class Rep, class Period, class Predicate>
Chris@16:         bool
Chris@16:         wait_for(
Chris@16:                 unique_lock<mutex>& lock,
Chris@16:                 const chrono::duration<Rep, Period>& d,
Chris@16:                 Predicate pred)
Chris@16:         {
Chris@16:           return wait_until(lock, chrono::steady_clock::now() + d, boost::move(pred));
Chris@16: 
Chris@16: //          while (!pred())
Chris@16: //          {
Chris@16: //              if (wait_for(lock, d) == cv_status::timeout)
Chris@16: //                  return pred();
Chris@16: //          }
Chris@16: //          return true;
Chris@16:         }
Chris@16: #endif
Chris@16: 
Chris@16: #define BOOST_THREAD_DEFINES_CONDITION_VARIABLE_NATIVE_HANDLE
Chris@16:         typedef pthread_cond_t* native_handle_type;
Chris@16:         native_handle_type native_handle()
Chris@16:         {
Chris@16:             return &cond;
Chris@16:         }
Chris@16: 
Chris@16:         void notify_one() BOOST_NOEXCEPT;
Chris@16:         void notify_all() BOOST_NOEXCEPT;
Chris@16: 
Chris@16: #ifdef BOOST_THREAD_USES_CHRONO
Chris@16:         inline cv_status wait_until(
Chris@16:             unique_lock<mutex>& lk,
Chris@16:             chrono::time_point<chrono::system_clock, chrono::nanoseconds> tp)
Chris@16:         {
Chris@16:             using namespace chrono;
Chris@16:             nanoseconds d = tp.time_since_epoch();
Chris@16:             timespec ts = boost::detail::to_timespec(d);
Chris@16:             if (do_wait_until(lk, ts)) return cv_status::no_timeout;
Chris@16:             else return cv_status::timeout;
Chris@16:         }
Chris@16: #endif
Chris@16:     };
Chris@16: 
Chris@16:     BOOST_THREAD_DECL void notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk);
Chris@16: 
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: #include <boost/config/abi_suffix.hpp>
Chris@16: 
Chris@16: #endif