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
206
207
208
209
210
211
212
|
/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "SocketMonitor.hxx"
#include "Loop.hxx"
#include "system/fd_util.h"
#include "Compiler.h"
#include <assert.h>
#ifdef WIN32
#include <winsock2.h>
#else
#include <sys/types.h>
#include <sys/socket.h>
#endif
#ifdef USE_EPOLL
void
SocketMonitor::Dispatch(unsigned flags)
{
flags &= GetScheduledFlags();
if (flags != 0 && !OnSocketReady(flags) && IsDefined())
Cancel();
}
#else
/*
* GSource methods
*
*/
gboolean
SocketMonitor::Prepare(gcc_unused GSource *source, gcc_unused gint *timeout_r)
{
return false;
}
gboolean
SocketMonitor::Check(GSource *_source)
{
const Source &source = *(const Source *)_source;
const SocketMonitor &monitor = *source.monitor;
assert(_source == &monitor.source->base);
return monitor.Check();
}
gboolean
SocketMonitor::Dispatch(GSource *_source,
gcc_unused GSourceFunc callback,
gcc_unused gpointer user_data)
{
Source &source = *(Source *)_source;
SocketMonitor &monitor = *source.monitor;
assert(_source == &monitor.source->base);
monitor.Dispatch();
return true;
}
/**
* The vtable for our GSource implementation. Unfortunately, we
* cannot declare it "const", because g_source_new() takes a non-const
* pointer, for whatever reason.
*/
static GSourceFuncs socket_monitor_source_funcs = {
SocketMonitor::Prepare,
SocketMonitor::Check,
SocketMonitor::Dispatch,
nullptr,
nullptr,
nullptr,
};
SocketMonitor::SocketMonitor(int _fd, EventLoop &_loop)
:fd(-1), loop(_loop),
source(nullptr) {
assert(_fd >= 0);
Open(_fd);
}
#endif
SocketMonitor::~SocketMonitor()
{
if (IsDefined())
Close();
}
void
SocketMonitor::Open(int _fd)
{
assert(fd < 0);
#ifndef USE_EPOLL
assert(source == nullptr);
#endif
assert(_fd >= 0);
fd = _fd;
#ifndef USE_EPOLL
poll = {fd, 0, 0};
source = (Source *)g_source_new(&socket_monitor_source_funcs,
sizeof(*source));
source->monitor = this;
g_source_attach(&source->base, loop.GetContext());
g_source_add_poll(&source->base, &poll);
#endif
}
int
SocketMonitor::Steal()
{
assert(IsDefined());
Cancel();
int result = fd;
fd = -1;
#ifndef USE_EPOLL
g_source_destroy(&source->base);
g_source_unref(&source->base);
source = nullptr;
#endif
return result;
}
void
SocketMonitor::Close()
{
close_socket(Steal());
}
void
SocketMonitor::Schedule(unsigned flags)
{
assert(IsDefined());
if (flags == GetScheduledFlags())
return;
#ifdef USE_EPOLL
if (scheduled_flags == 0)
loop.AddFD(fd, flags, *this);
else if (flags == 0)
loop.RemoveFD(fd, *this);
else
loop.ModifyFD(fd, flags, *this);
scheduled_flags = flags;
#else
poll.events = flags;
poll.revents &= flags;
loop.WakeUp();
#endif
}
SocketMonitor::ssize_t
SocketMonitor::Read(void *data, size_t length)
{
assert(IsDefined());
int flags = 0;
#ifdef MSG_DONTWAIT
flags |= MSG_DONTWAIT;
#endif
return recv(Get(), (char *)data, length, flags);
}
SocketMonitor::ssize_t
SocketMonitor::Write(const void *data, size_t length)
{
assert(IsDefined());
int flags = 0;
#ifdef MSG_NOSIGNAL
flags |= MSG_NOSIGNAL;
#endif
#ifdef MSG_DONTWAIT
flags |= MSG_DONTWAIT;
#endif
return send(Get(), (const char *)data, length, flags);
}
|
