Michael Fabian 'Xaymar' Dirks
d6e6ec96c4
IOCompletionPorts are the modern way to handle asynchronous IO without affected the system too much. Synchronization, work allocation and spreading, etc is all handled by the OS for us, which reduces the work we have to do in order to be NUMA aware. While this is far from perfect, it should perform better than a naive threaded approach. ToDo: - Add documentation generation - Add Github Actions integration - Write tests for everything. - Update 'benchmark' sample to work again. - Figure out a useful way to deal with connect/disconnect/error events. - Figure out the broken pipe error, caused by an additional connected event where none should have been.
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
/*
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Low Latency IPC Library for high-speed traffic
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Copyright (C) 2019 Michael Fabian Dirks <info@xaymar.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <codecvt>
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#include <locale>
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#include <string>
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extern "C" {
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#include <Windows.h>
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}
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namespace datapath {
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namespace windows {
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namespace utility {
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typedef uint64_t packet_size_t;
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static inline bool make_pipe_path(std::string& string)
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{
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// Convert path to WinAPI compatible string.
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if (string.length() >= (MAX_PATH - 10ull)) {
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// \\.\pipe\ is 9 characters, but we count 10 here.
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return false;
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}
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for (char& v : string) {
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if (v == '\\') { // Backslash is not allowed.
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v = '/';
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}
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}
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string = {"\\\\.\\pipe\\" + string};
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return true;
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}
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static inline std::wstring make_wide_string(std::string string)
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{
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std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
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return converter.from_bytes(string);
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}
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static VOID CALLBACK def_io_completion_routine(_In_ DWORD dwErrorCode, _In_ DWORD dwNumberOfBytesTransfered,
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_Inout_ LPOVERLAPPED lpOverlapped)
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{
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SetEvent(lpOverlapped->hEvent);
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}
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static void shared_ptr_handle_deleter(HANDLE v)
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{
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CloseHandle(v);
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}
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inline void build_packet(const std::vector<char>& source, std::vector<char>& target)
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{
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target.resize(sizeof(packet_size_t) + source.size());
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memcpy(target.data() + sizeof(packet_size_t), source.data(), source.size());
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reinterpret_cast<packet_size_t&>(*target.data()) = source.size();
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}
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} // namespace utility
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} // namespace windows
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} // namespace datapath
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