97 lines
2.6 KiB
Plaintext
97 lines
2.6 KiB
Plaintext
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//
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// impl/cancellation_signal.ipp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_IMPL_CANCELLATION_SIGNAL_IPP
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#define ASIO_IMPL_CANCELLATION_SIGNAL_IPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#include "asio/cancellation_signal.hpp"
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#include "asio/detail/thread_context.hpp"
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#include "asio/detail/thread_info_base.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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cancellation_signal::~cancellation_signal()
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{
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if (handler_)
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{
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std::pair<void*, std::size_t> mem = handler_->destroy();
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detail::thread_info_base::deallocate(
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detail::thread_info_base::cancellation_signal_tag(),
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detail::thread_context::top_of_thread_call_stack(),
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mem.first, mem.second);
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}
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}
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void cancellation_slot::clear()
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{
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if (handler_ != 0 && *handler_ != 0)
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{
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std::pair<void*, std::size_t> mem = (*handler_)->destroy();
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detail::thread_info_base::deallocate(
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detail::thread_info_base::cancellation_signal_tag(),
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detail::thread_context::top_of_thread_call_stack(),
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mem.first, mem.second);
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*handler_ = 0;
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}
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}
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std::pair<void*, std::size_t> cancellation_slot::prepare_memory(
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std::size_t size, std::size_t align)
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{
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assert(handler_);
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std::pair<void*, std::size_t> mem;
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if (*handler_)
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{
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mem = (*handler_)->destroy();
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*handler_ = 0;
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}
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if (size > mem.second
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|| reinterpret_cast<std::size_t>(mem.first) % align != 0)
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{
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if (mem.first)
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{
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detail::thread_info_base::deallocate(
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detail::thread_info_base::cancellation_signal_tag(),
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detail::thread_context::top_of_thread_call_stack(),
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mem.first, mem.second);
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}
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mem.first = detail::thread_info_base::allocate(
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detail::thread_info_base::cancellation_signal_tag(),
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detail::thread_context::top_of_thread_call_stack(),
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size, align);
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mem.second = size;
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}
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return mem;
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}
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cancellation_slot::auto_delete_helper::~auto_delete_helper()
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{
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if (mem.first)
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{
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detail::thread_info_base::deallocate(
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detail::thread_info_base::cancellation_signal_tag(),
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detail::thread_context::top_of_thread_call_stack(),
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mem.first, mem.second);
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}
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}
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_IMPL_CANCELLATION_SIGNAL_IPP
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