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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2014 Laurent Gomila (laurent.gom@gmail.com)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Network/SocketSelector.hpp>
#include <SFML/Network/Socket.hpp>
#include <SFML/Network/SocketImpl.hpp>
#include <SFML/System/Err.hpp>
#include <algorithm>
#include <utility>
#ifdef _MSC_VER
#pragma warning(disable: 4127) // "conditional expression is constant" generated by the FD_SET macro
#endif
namespace sf
{
////////////////////////////////////////////////////////////
struct SocketSelector::SocketSelectorImpl
{
fd_set allSockets; ///< Set containing all the sockets handles
fd_set socketsReady; ///< Set containing handles of the sockets that are ready
int maxSocket; ///< Maximum socket handle
int socketCount; ///< Number of socket handles
};
////////////////////////////////////////////////////////////
SocketSelector::SocketSelector() :
m_impl(new SocketSelectorImpl)
{
clear();
}
////////////////////////////////////////////////////////////
SocketSelector::SocketSelector(const SocketSelector& copy) :
m_impl(new SocketSelectorImpl(*copy.m_impl))
{
}
////////////////////////////////////////////////////////////
SocketSelector::~SocketSelector()
{
delete m_impl;
}
////////////////////////////////////////////////////////////
void SocketSelector::add(Socket& socket)
{
SocketHandle handle = socket.getHandle();
if (handle != priv::SocketImpl::invalidSocket())
{
#if defined(SFML_SYSTEM_WINDOWS)
if (m_impl->socketCount >= FD_SETSIZE)
{
err() << "The socket can't be added to the selector because the "
<< "selector is full. This is a limitation of your operating "
<< "system's FD_SETSIZE setting.";
return;
}
if (FD_ISSET(handle, &m_impl->allSockets))
return;
m_impl->socketCount++;
#else
if (handle >= FD_SETSIZE)
{
err() << "The socket can't be added to the selector because its "
<< "ID is too high. This is a limitation of your operating "
<< "system's FD_SETSIZE setting.";
return;
}
// SocketHandle is an int in POSIX
m_impl->maxSocket = std::max(m_impl->maxSocket, handle);
#endif
FD_SET(handle, &m_impl->allSockets);
}
}
////////////////////////////////////////////////////////////
void SocketSelector::remove(Socket& socket)
{
SocketHandle handle = socket.getHandle();
if (handle != priv::SocketImpl::invalidSocket())
{
#if defined(SFML_SYSTEM_WINDOWS)
if (!FD_ISSET(handle, &m_impl->allSockets))
return;
m_impl->socketCount--;
#else
if (handle >= FD_SETSIZE)
return;
#endif
FD_CLR(handle, &m_impl->allSockets);
FD_CLR(handle, &m_impl->socketsReady);
}
}
////////////////////////////////////////////////////////////
void SocketSelector::clear()
{
FD_ZERO(&m_impl->allSockets);
FD_ZERO(&m_impl->socketsReady);
m_impl->maxSocket = 0;
m_impl->socketCount = 0;
}
////////////////////////////////////////////////////////////
bool SocketSelector::wait(Time timeout)
{
// Setup the timeout
timeval time;
time.tv_sec = static_cast<long>(timeout.asMicroseconds() / 1000000);
time.tv_usec = static_cast<long>(timeout.asMicroseconds() % 1000000);
// Initialize the set that will contain the sockets that are ready
m_impl->socketsReady = m_impl->allSockets;
// Wait until one of the sockets is ready for reading, or timeout is reached
// The first parameter is ignored on Windows
int count = select(m_impl->maxSocket + 1, &m_impl->socketsReady, NULL, NULL, timeout != Time::Zero ? &time : NULL);
return count > 0;
}
////////////////////////////////////////////////////////////
bool SocketSelector::isReady(Socket& socket) const
{
SocketHandle handle = socket.getHandle();
if (handle != priv::SocketImpl::invalidSocket())
{
#if !defined(SFML_SYSTEM_WINDOWS)
if (handle >= FD_SETSIZE)
return false;
#endif
return FD_ISSET(handle, &m_impl->socketsReady) != 0;
}
return false;
}
////////////////////////////////////////////////////////////
SocketSelector& SocketSelector::operator =(const SocketSelector& right)
{
SocketSelector temp(right);
std::swap(m_impl, temp.m_impl);
return *this;
}
} // namespace sf
|
