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// detail/thread_context.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


#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include <climits>
#include <cstddef>
#include <boost/asio/detail/call_stack.hpp>

#include <boost/asio/detail/push_options.hpp>

namespace boost {
namespace asio {
namespace detail {

class thread_info_base;

// Base class for things that manage threads (scheduler, win_iocp_io_context).
class thread_context
  // Obtain a pointer to the top of the thread call stack. Returns null when
  // not running inside a thread context.
  BOOST_ASIO_DECL static thread_info_base* top_of_thread_call_stack();

  // Per-thread call stack to track the state of each thread in the context.
  typedef call_stack<thread_context, thread_info_base> thread_call_stack;

} // namespace detail
} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>

# include <boost/asio/detail/impl/thread_context.ipp>
#endif // defined(BOOST_ASIO_HEADER_ONLY)