blob: b4485cfe96c7d1af2faee70d3e84e29433d768db (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/**
* @file tcp_connect.cpp Basic functions to create connections without blocking.
*/
#include "../../stdafx.h"
#include "../../thread.h"
#include "tcp.h"
#include "../../safeguards.h"
/** List of connections that are currently being created */
static std::vector<TCPConnecter *> _tcp_connecters;
/**
* Create a new connecter for the given address
* @param address the (un)resolved address to connect to
*/
TCPConnecter::TCPConnecter(const NetworkAddress &address) :
connected(false),
aborted(false),
killed(false),
sock(INVALID_SOCKET),
address(address)
{
_tcp_connecters.push_back(this);
if (!StartNewThread(nullptr, "ottd:tcp", &TCPConnecter::ThreadEntry, this)) {
this->Connect();
}
}
/** The actual connection function */
void TCPConnecter::Connect()
{
this->sock = this->address.Connect();
if (this->sock == INVALID_SOCKET) {
this->aborted = true;
} else {
this->connected = true;
}
}
/**
* Entry point for the new threads.
* @param param the TCPConnecter instance to call Connect on.
*/
/* static */ void TCPConnecter::ThreadEntry(TCPConnecter *param)
{
param->Connect();
}
/**
* Check whether we need to call the callback, i.e. whether we
* have connected or aborted and call the appropriate callback
* for that. It's done this way to ease on the locking that
* would otherwise be needed everywhere.
*/
/* static */ void TCPConnecter::CheckCallbacks()
{
for (auto iter = _tcp_connecters.begin(); iter < _tcp_connecters.end(); /* nothing */) {
TCPConnecter *cur = *iter;
const bool connected = cur->connected.load();
const bool aborted = cur->aborted.load();
if ((connected || aborted) && cur->killed) {
iter = _tcp_connecters.erase(iter);
if (cur->sock != INVALID_SOCKET) closesocket(cur->sock);
delete cur;
continue;
}
if (connected) {
iter = _tcp_connecters.erase(iter);
cur->OnConnect(cur->sock);
delete cur;
continue;
}
if (aborted) {
iter = _tcp_connecters.erase(iter);
cur->OnFailure();
delete cur;
continue;
}
iter++;
}
}
/** Kill all connection attempts. */
/* static */ void TCPConnecter::KillAll()
{
for (TCPConnecter *conn : _tcp_connecters) conn->killed = true;
}
|
