102 lines
2.0 KiB
C++
Executable File
102 lines
2.0 KiB
C++
Executable File
//
|
|
// detail/thread_group.hpp
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~
|
|
//
|
|
// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
|
|
//
|
|
// 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_ASIO_DETAIL_THREAD_GROUP_HPP
|
|
#define BOOST_ASIO_DETAIL_THREAD_GROUP_HPP
|
|
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
|
|
# pragma once
|
|
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
|
|
|
|
#include <boost/asio/detail/config.hpp>
|
|
#include <boost/asio/detail/scoped_ptr.hpp>
|
|
#include <boost/asio/detail/thread.hpp>
|
|
|
|
#include <boost/asio/detail/push_options.hpp>
|
|
|
|
namespace boost {
|
|
namespace asio {
|
|
namespace detail {
|
|
|
|
class thread_group
|
|
{
|
|
public:
|
|
// Constructor initialises an empty thread group.
|
|
thread_group()
|
|
: first_(0)
|
|
{
|
|
}
|
|
|
|
// Destructor joins any remaining threads in the group.
|
|
~thread_group()
|
|
{
|
|
join();
|
|
}
|
|
|
|
// Create a new thread in the group.
|
|
template <typename Function>
|
|
void create_thread(Function f)
|
|
{
|
|
first_ = new item(f, first_);
|
|
}
|
|
|
|
// Create new threads in the group.
|
|
template <typename Function>
|
|
void create_threads(Function f, std::size_t num_threads)
|
|
{
|
|
for (std::size_t i = 0; i < num_threads; ++i)
|
|
create_thread(f);
|
|
}
|
|
|
|
// Wait for all threads in the group to exit.
|
|
void join()
|
|
{
|
|
while (first_)
|
|
{
|
|
first_->thread_.join();
|
|
item* tmp = first_;
|
|
first_ = first_->next_;
|
|
delete tmp;
|
|
}
|
|
}
|
|
|
|
// Test whether the group is empty.
|
|
bool empty() const
|
|
{
|
|
return first_ == 0;
|
|
}
|
|
|
|
private:
|
|
// Structure used to track a single thread in the group.
|
|
struct item
|
|
{
|
|
template <typename Function>
|
|
explicit item(Function f, item* next)
|
|
: thread_(f),
|
|
next_(next)
|
|
{
|
|
}
|
|
|
|
boost::asio::detail::thread thread_;
|
|
item* next_;
|
|
};
|
|
|
|
// The first thread in the group.
|
|
item* first_;
|
|
};
|
|
|
|
} // namespace detail
|
|
} // namespace asio
|
|
} // namespace boost
|
|
|
|
#include <boost/asio/detail/pop_options.hpp>
|
|
|
|
#endif // BOOST_ASIO_DETAIL_THREAD_GROUP_HPP
|