256 lines
7.5 KiB
C++
256 lines
7.5 KiB
C++
// 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
|