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Name	Size	Mode	Actions
concurrent_queues/	-	0755	rm
csbl/	-	0755	rm
detail/	-	0755	rm
executors/	-	0755	rm
experimental/	-	0755	rm
futures/	-	0755	rm
pthread/	-	0755	rm
v2/	-	0755	rm
win32/	-	0755	rm
barrier.hpp	7421	0644	edit dl rm
caller_context.hpp	1526	0644	edit dl rm
completion_latch.hpp	6579	0644	edit dl rm
condition.hpp	490	0644	edit dl rm
condition_variable.hpp	634	0644	edit dl rm
cv_status.hpp	531	0644	edit dl rm
exceptional_ptr.hpp	1098	0644	edit dl rm
exceptions.hpp	6286	0644	edit dl rm
executor.hpp	476	0644	edit dl rm
externally_locked.hpp	10792	0644	edit dl rm
externally_locked_stream.hpp	4784	0644	edit dl rm
future.hpp	203792	0644	edit dl rm
interruption.hpp	596	0644	edit dl rm
is_locked_by_this_thread.hpp	1062	0644	edit dl rm
latch.hpp	4967	0644	edit dl rm
lockable_adapter.hpp	6043	0644	edit dl rm
lockable_concepts.hpp	4114	0644	edit dl rm
lockable_traits.hpp	7853	0644	edit dl rm
locks.hpp	572	0644	edit dl rm
lock_algorithms.hpp	13201	0644	edit dl rm
lock_concepts.hpp	4792	0644	edit dl rm
lock_factories.hpp	2317	0644	edit dl rm
lock_guard.hpp	2290	0644	edit dl rm
lock_options.hpp	701	0644	edit dl rm
lock_traits.hpp	1234	0644	edit dl rm
lock_types.hpp	34418	0644	edit dl rm
mutex.hpp	1166	0644	edit dl rm
null_mutex.hpp	6346	0644	edit dl rm
once.hpp	1324	0644	edit dl rm
ostream_buffer.hpp	925	0644	edit dl rm
poly_lockable.hpp	2100	0644	edit dl rm
poly_lockable_adapter.hpp	2124	0644	edit dl rm
poly_shared_lockable.hpp	5807	0644	edit dl rm
poly_shared_lockable_adapter.hpp	4792	0644	edit dl rm
recursive_mutex.hpp	1535	0644	edit dl rm
reverse_lock.hpp	1316	0644	edit dl rm
scoped_thread.hpp	8547	0644	edit dl rm
shared_lock_guard.hpp	1192	0644	edit dl rm
shared_mutex.hpp	1400	0644	edit dl rm
strict_lock.hpp	6246	0644	edit dl rm
synchronized_value.hpp	31110	0644	edit dl rm
sync_bounded_queue.hpp	595	0644	edit dl rm
sync_queue.hpp	571	0644	edit dl rm
testable_mutex.hpp	3925	0644	edit dl rm
thread.hpp	385	0644	edit dl rm
thread_functors.hpp	1366	0644	edit dl rm
thread_guard.hpp	1069	0644	edit dl rm
thread_only.hpp	803	0644	edit dl rm
thread_pool.hpp	531	0644	edit dl rm
thread_time.hpp	1590	0644	edit dl rm
tss.hpp	2603	0644	edit dl rm
user_scheduler.hpp	5222	0644	edit dl rm
with_lock_guard.hpp	6052	0644	edit dl rm
xtime.hpp	2390	0644	edit dl rm

Edit: /usr/include/boost/thread/barrier.hpp (7421B)

// Copyright (C) 2002-2003
// David Moore, William E. Kempf
// Copyright (C) 2007-8 Anthony Williams
// (C) Copyright 2013 Vicente J. Botet Escriba
//
//  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_BARRIER_JDM030602_HPP
#define BOOST_BARRIER_JDM030602_HPP

#include <boost/thread/detail/config.hpp>
#include <boost/thread/detail/delete.hpp>

#include <boost/throw_exception.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/lock_types.hpp>
#include <boost/thread/condition_variable.hpp>
#include <string>
#include <stdexcept>
#include <boost/thread/detail/nullary_function.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/is_void.hpp>
#include <boost/core/enable_if.hpp>
#include <boost/utility/result_of.hpp>

#include <boost/config/abi_prefix.hpp>

namespace boost
{
  namespace thread_detail
  {
    typedef detail::nullary_function<void()> void_completion_function;
    typedef detail::nullary_function<size_t()> size_completion_function;

struct default_barrier_reseter
    {
      unsigned int size_;
      default_barrier_reseter(unsigned int size) :
        size_(size)
      {
      }
      BOOST_THREAD_MOVABLE(default_barrier_reseter)
      //BOOST_THREAD_COPYABLE_AND_MOVABLE(default_barrier_reseter)

default_barrier_reseter(default_barrier_reseter const& other) BOOST_NOEXCEPT :
      size_(other.size_)
      {
      }
      default_barrier_reseter(BOOST_THREAD_RV_REF(default_barrier_reseter) other) BOOST_NOEXCEPT :
      size_(BOOST_THREAD_RV(other).size_)
      {
      }

unsigned int operator()()
      {
        return size_;
      }
    };

struct void_functor_barrier_reseter
    {
      unsigned int size_;
      void_completion_function fct_;
      template <typename F>
      void_functor_barrier_reseter(unsigned int size, BOOST_THREAD_RV_REF(F) funct)
      : size_(size), fct_(boost::move(funct))
      {}
      template <typename F>
      void_functor_barrier_reseter(unsigned int size, F& funct)
      : size_(size), fct_(funct)
      {}

BOOST_THREAD_MOVABLE(void_functor_barrier_reseter)
      //BOOST_THREAD_COPYABLE_AND_MOVABLE(void_functor_barrier_reseter)

void_functor_barrier_reseter(void_functor_barrier_reseter const& other) BOOST_NOEXCEPT :
      size_(other.size_), fct_(other.fct_)
      {
      }
      void_functor_barrier_reseter(BOOST_THREAD_RV_REF(void_functor_barrier_reseter) other) BOOST_NOEXCEPT :
      size_(BOOST_THREAD_RV(other).size_), fct_(BOOST_THREAD_RV(other).fct_)
      //size_(BOOST_THREAD_RV(other).size_), fct_(boost::move(BOOST_THREAD_RV(other).fct_))
      {
      }

unsigned int operator()()
      {
        fct_();
        return size_;
      }
    };
    struct void_fct_ptr_barrier_reseter
    {
      unsigned int size_;
      void(*fct_)();
      void_fct_ptr_barrier_reseter(unsigned int size, void(*funct)()) :
        size_(size), fct_(funct)
      {
      }
      BOOST_THREAD_MOVABLE(void_fct_ptr_barrier_reseter)
      //BOOST_THREAD_COPYABLE_AND_MOVABLE(void_fct_ptr_barrier_reseter)

void_fct_ptr_barrier_reseter(void_fct_ptr_barrier_reseter const& other) BOOST_NOEXCEPT :
      size_(other.size_), fct_(other.fct_)
      {
      }
      void_fct_ptr_barrier_reseter(BOOST_THREAD_RV_REF(void_fct_ptr_barrier_reseter) other) BOOST_NOEXCEPT :
      size_(BOOST_THREAD_RV(other).size_), fct_(BOOST_THREAD_RV(other).fct_)
      {
      }
      unsigned int operator()()
      {
        fct_();
        return size_;
      }
    };
  }
  //BOOST_THREAD_DCL_MOVABLE(thread_detail::default_barrier_reseter)
  //BOOST_THREAD_DCL_MOVABLE(thread_detail::void_functor_barrier_reseter)
  //BOOST_THREAD_DCL_MOVABLE(thread_detail::void_fct_ptr_barrier_reseter)

class barrier
  {
    static inline unsigned int check_counter(unsigned int count)
    {
      if (count == 0) boost::throw_exception(
          thread_exception(system::errc::invalid_argument, "barrier constructor: count cannot be zero."));
      return count;
    }
    struct dummy
    {
    };

public:
    BOOST_THREAD_NO_COPYABLE( barrier)

explicit barrier(unsigned int count) :
      m_count(check_counter(count)), m_generation(0), fct_(BOOST_THREAD_MAKE_RV_REF(thread_detail::default_barrier_reseter(count)))
    {
    }

template <typename F>
    barrier(
        unsigned int count,
        BOOST_THREAD_RV_REF(F) funct,
        typename enable_if<
        typename is_void<typename result_of<F()>::type>::type, dummy*
        >::type=0
    )
    : m_count(check_counter(count)),
      m_generation(0),
      fct_(BOOST_THREAD_MAKE_RV_REF(thread_detail::void_functor_barrier_reseter(count,
        boost::move(funct)))
    )
    {
    }
    template <typename F>
    barrier(
        unsigned int count,
        F &funct,
        typename enable_if<
        typename is_void<typename result_of<F()>::type>::type, dummy*
        >::type=0
    )
    : m_count(check_counter(count)),
      m_generation(0),
      fct_(BOOST_THREAD_MAKE_RV_REF(thread_detail::void_functor_barrier_reseter(count,
        funct))
    )
    {
    }

template <typename F>
    barrier(
        unsigned int count,
        BOOST_THREAD_RV_REF(F) funct,
        typename enable_if<
        typename is_same<typename result_of<F()>::type, unsigned int>::type, dummy*
        >::type=0
    )
    : m_count(check_counter(count)),
      m_generation(0),
      fct_(boost::move(funct))
    {
    }
    template <typename F>
    barrier(
        unsigned int count,
        F& funct,
        typename enable_if<
        typename is_same<typename result_of<F()>::type, unsigned int>::type, dummy*
        >::type=0
    )
    : m_count(check_counter(count)),
      m_generation(0),
      fct_(funct)
    {
    }

barrier(unsigned int count, void(*funct)()) :
      m_count(check_counter(count)), m_generation(0),
      fct_(funct
          ? BOOST_THREAD_MAKE_RV_REF(thread_detail::size_completion_function(BOOST_THREAD_MAKE_RV_REF(thread_detail::void_fct_ptr_barrier_reseter(count, funct))))
          : BOOST_THREAD_MAKE_RV_REF(thread_detail::size_completion_function(BOOST_THREAD_MAKE_RV_REF(thread_detail::default_barrier_reseter(count))))
      )
    {
    }
    barrier(unsigned int count, unsigned int(*funct)()) :
      m_count(check_counter(count)), m_generation(0),
      fct_(funct
          ? BOOST_THREAD_MAKE_RV_REF(thread_detail::size_completion_function(funct))
          : BOOST_THREAD_MAKE_RV_REF(thread_detail::size_completion_function(BOOST_THREAD_MAKE_RV_REF(thread_detail::default_barrier_reseter(count))))
      )
    {
    }

bool wait()
    {
      boost::unique_lock < boost::mutex > lock(m_mutex);
      unsigned int gen = m_generation;

if (--m_count == 0)
      {
        m_generation++;
        m_count = static_cast<unsigned int>(fct_());
        BOOST_ASSERT(m_count != 0);
        lock.unlock();
        m_cond.notify_all();
        return true;
      }

while (gen == m_generation)
        m_cond.wait(lock);
      return false;
    }

void count_down_and_wait()
    {
      wait();
    }

private:
    mutex m_mutex;
    condition_variable m_cond;
    unsigned int m_count;
    unsigned int m_generation;
    thread_detail::size_completion_function fct_;
  };

} // namespace boost

#include <boost/config/abi_suffix.hpp>

#endif

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