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100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file tcp_connect.cpp Basic functions to create connections without blocking.
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*/
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#include "../../stdafx.h"
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#include "../../thread.h"
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#include "tcp.h"
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#include "../network_internal.h"
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#include "../../safeguards.h"
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/** List of connections that are currently being created */
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static std::vector<TCPConnecter *> _tcp_connecters;
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/**
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* Create a new connecter for the given address
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* @param connection_string the address to connect to
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*/
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TCPConnecter::TCPConnecter(const std::string &connection_string, uint16 default_port) :
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connected(false),
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aborted(false),
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killed(false),
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sock(INVALID_SOCKET)
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{
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this->address = ParseConnectionString(connection_string, default_port);
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_tcp_connecters.push_back(this);
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if (!StartNewThread(nullptr, "ottd:tcp", &TCPConnecter::ThreadEntry, this)) {
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this->Connect();
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}
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}
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/** The actual connection function */
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void TCPConnecter::Connect()
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{
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this->sock = this->address.Connect();
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if (this->sock == INVALID_SOCKET) {
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this->aborted = true;
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} else {
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this->connected = true;
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}
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}
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/**
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* Entry point for the new threads.
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* @param param the TCPConnecter instance to call Connect on.
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*/
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/* static */ void TCPConnecter::ThreadEntry(TCPConnecter *param)
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{
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param->Connect();
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}
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/**
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* Check whether we need to call the callback, i.e. whether we
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* have connected or aborted and call the appropriate callback
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* for that. It's done this way to ease on the locking that
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* would otherwise be needed everywhere.
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*/
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/* static */ void TCPConnecter::CheckCallbacks()
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{
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for (auto iter = _tcp_connecters.begin(); iter < _tcp_connecters.end(); /* nothing */) {
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TCPConnecter *cur = *iter;
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const bool connected = cur->connected.load();
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const bool aborted = cur->aborted.load();
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if ((connected || aborted) && cur->killed) {
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iter = _tcp_connecters.erase(iter);
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if (cur->sock != INVALID_SOCKET) closesocket(cur->sock);
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delete cur;
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continue;
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}
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if (connected) {
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iter = _tcp_connecters.erase(iter);
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cur->OnConnect(cur->sock);
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delete cur;
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continue;
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}
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if (aborted) {
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iter = _tcp_connecters.erase(iter);
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cur->OnFailure();
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delete cur;
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continue;
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}
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iter++;
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}
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}
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/** Kill all connection attempts. */
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/* static */ void TCPConnecter::KillAll()
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{
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for (TCPConnecter *conn : _tcp_connecters) conn->killed = true;
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}
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