99 lines
2.6 KiB
C++
Executable File
99 lines
2.6 KiB
C++
Executable File
//
|
|
// impl/cancellation_signal.ipp
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
//
|
|
// 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_IMPL_CANCELLATION_SIGNAL_IPP
|
|
#define BOOST_ASIO_IMPL_CANCELLATION_SIGNAL_IPP
|
|
|
|
#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/cancellation_signal.hpp>
|
|
#include <boost/asio/detail/thread_context.hpp>
|
|
#include <boost/asio/detail/thread_info_base.hpp>
|
|
|
|
#include <boost/asio/detail/push_options.hpp>
|
|
|
|
namespace boost {
|
|
namespace asio {
|
|
|
|
cancellation_signal::~cancellation_signal()
|
|
{
|
|
if (handler_)
|
|
{
|
|
std::pair<void*, std::size_t> mem = handler_->destroy();
|
|
detail::thread_info_base::deallocate(
|
|
detail::thread_info_base::cancellation_signal_tag(),
|
|
detail::thread_context::top_of_thread_call_stack(),
|
|
mem.first, mem.second);
|
|
}
|
|
}
|
|
|
|
void cancellation_slot::clear()
|
|
{
|
|
if (handler_ != 0 && *handler_ != 0)
|
|
{
|
|
std::pair<void*, std::size_t> mem = (*handler_)->destroy();
|
|
detail::thread_info_base::deallocate(
|
|
detail::thread_info_base::cancellation_signal_tag(),
|
|
detail::thread_context::top_of_thread_call_stack(),
|
|
mem.first, mem.second);
|
|
*handler_ = 0;
|
|
}
|
|
}
|
|
|
|
std::pair<void*, std::size_t> cancellation_slot::prepare_memory(
|
|
std::size_t size, std::size_t align)
|
|
{
|
|
assert(handler_);
|
|
std::pair<void*, std::size_t> mem;
|
|
if (*handler_)
|
|
{
|
|
mem = (*handler_)->destroy();
|
|
*handler_ = 0;
|
|
}
|
|
if (size > mem.second
|
|
|| reinterpret_cast<std::size_t>(mem.first) % align != 0)
|
|
{
|
|
if (mem.first)
|
|
{
|
|
detail::thread_info_base::deallocate(
|
|
detail::thread_info_base::cancellation_signal_tag(),
|
|
detail::thread_context::top_of_thread_call_stack(),
|
|
mem.first, mem.second);
|
|
}
|
|
mem.first = detail::thread_info_base::allocate(
|
|
detail::thread_info_base::cancellation_signal_tag(),
|
|
detail::thread_context::top_of_thread_call_stack(),
|
|
size, align);
|
|
mem.second = size;
|
|
}
|
|
return mem;
|
|
}
|
|
|
|
cancellation_slot::auto_delete_helper::~auto_delete_helper()
|
|
{
|
|
if (mem.first)
|
|
{
|
|
detail::thread_info_base::deallocate(
|
|
detail::thread_info_base::cancellation_signal_tag(),
|
|
detail::thread_context::top_of_thread_call_stack(),
|
|
mem.first, mem.second);
|
|
}
|
|
}
|
|
|
|
} // namespace asio
|
|
} // namespace boost
|
|
|
|
#include <boost/asio/detail/pop_options.hpp>
|
|
|
|
#endif // BOOST_ASIO_IMPL_CANCELLATION_SIGNAL_IPP
|