1 /***
2 This file is part of avahi.
3
4 avahi is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
8
9 avahi is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12 Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with avahi; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17 USA.
18 ***/
19
20 #include <sys/time.h>
21 #if defined(QT5) || defined(QT4)
22 #include <QSocketNotifier>
23 #include <QObject>
24 #include <QTimer>
25 #else
26 #include <qsocketnotifier.h>
27 #include <qobject.h>
28 #include <qtimer.h>
29 #endif
30 #include <avahi-common/timeval.h>
31 #include "qt-watch.h"
32
33 class AvahiWatch : public QObject
34 {
35 Q_OBJECT
36 public:
37 AvahiWatch(int fd, AvahiWatchEvent event, AvahiWatchCallback callback, void* userdata);
~AvahiWatch()38 ~AvahiWatch() {}
getEvents() const39 AvahiWatchEvent getEvents() const { return m_incallback ? m_lastEvent : (AvahiWatchEvent)0; }
40 void setWatchedEvents(AvahiWatchEvent event);
41
42 private slots:
43 void gotIn();
44 void gotOut();
45
46 private:
47 QSocketNotifier* m_in;
48 QSocketNotifier* m_out;
49 //FIXME: ERR and HUP?
50 AvahiWatchCallback m_callback;
51 AvahiWatchEvent m_lastEvent;
52 int m_fd;
53 void* m_userdata;
54 bool m_incallback;
55 };
56
57 class AvahiTimeout : public QObject
58 {
59 Q_OBJECT
60
61 public:
62 AvahiTimeout(const struct timeval* tv, AvahiTimeoutCallback callback, void* userdata);
~AvahiTimeout()63 ~AvahiTimeout() {}
64 void update(const struct timeval* tv);
65
66 private slots:
67 void timeout();
68
69 private:
70 QTimer m_timer;
71 AvahiTimeoutCallback m_callback;
72 void* m_userdata;
73 };
74
75
76
AvahiWatch(int fd,AvahiWatchEvent event,AvahiWatchCallback callback,void * userdata)77 AvahiWatch::AvahiWatch(int fd, AvahiWatchEvent event, AvahiWatchCallback callback, void* userdata) :
78 m_in(0), m_out(0), m_callback(callback), m_fd(fd), m_userdata(userdata), m_incallback(false)
79 {
80 setWatchedEvents(event);
81 }
82
gotIn()83 void AvahiWatch::gotIn()
84 {
85 m_lastEvent = AVAHI_WATCH_IN;
86 m_incallback=true;
87 m_callback(this,m_fd,m_lastEvent,m_userdata);
88 m_incallback=false;
89 }
90
gotOut()91 void AvahiWatch::gotOut()
92 {
93 m_lastEvent = AVAHI_WATCH_IN;
94 m_incallback=true;
95 m_callback(this,m_fd,m_lastEvent,m_userdata);
96 m_incallback=false;
97 }
98
setWatchedEvents(AvahiWatchEvent event)99 void AvahiWatch::setWatchedEvents(AvahiWatchEvent event)
100 {
101 if (!(event & AVAHI_WATCH_IN)) { delete m_in; m_in=0; }
102 if (!(event & AVAHI_WATCH_OUT)) { delete m_out; m_out=0; }
103 if (event & AVAHI_WATCH_IN) {
104 m_in = new QSocketNotifier(m_fd,QSocketNotifier::Read, this);
105 connect(m_in,SIGNAL(activated(int)),SLOT(gotIn()));
106 }
107 if (event & AVAHI_WATCH_OUT) {
108 m_out = new QSocketNotifier(m_fd,QSocketNotifier::Write, this);
109 connect(m_out,SIGNAL(activated(int)),SLOT(gotOut()));
110 }
111 }
112
AvahiTimeout(const struct timeval * tv,AvahiTimeoutCallback callback,void * userdata)113 AvahiTimeout::AvahiTimeout(const struct timeval* tv, AvahiTimeoutCallback callback, void *userdata) :
114 m_callback(callback), m_userdata(userdata)
115 {
116 connect(&m_timer, SIGNAL(timeout()), this, SLOT(timeout()));
117 #if defined(QT5) || defined(QT4)
118 m_timer.setSingleShot(true);
119 #endif
120 update(tv);
121 }
122
update(const struct timeval * tv)123 void AvahiTimeout::update(const struct timeval *tv)
124 {
125 m_timer.stop();
126 if (tv) {
127 AvahiUsec u = avahi_age(tv)/1000;
128 #if defined(QT5) || defined(QT4)
129 m_timer.start( (u>0) ? 0 : -u);
130 #else
131 m_timer.start( (u>0) ? 0 : -u,true);
132 #endif
133 }
134 }
135
timeout()136 void AvahiTimeout::timeout()
137 {
138 m_callback(this,m_userdata);
139 }
140
q_watch_new(const AvahiPoll * api,int fd,AvahiWatchEvent event,AvahiWatchCallback callback,void * userdata)141 static AvahiWatch* q_watch_new(const AvahiPoll *api, int fd, AvahiWatchEvent event, AvahiWatchCallback callback,
142 void *userdata)
143 {
144 return new AvahiWatch(fd, event, callback, userdata);
145 }
146
q_watch_update(AvahiWatch * w,AvahiWatchEvent events)147 static void q_watch_update(AvahiWatch *w, AvahiWatchEvent events)
148 {
149 w->setWatchedEvents(events);
150 }
151
q_watch_get_events(AvahiWatch * w)152 static AvahiWatchEvent q_watch_get_events(AvahiWatch *w)
153 {
154 return w->getEvents();
155 }
156
q_watch_free(AvahiWatch * w)157 static void q_watch_free(AvahiWatch *w)
158 {
159 delete w;
160 }
161
q_timeout_new(const AvahiPoll * api,const struct timeval * tv,AvahiTimeoutCallback callback,void * userdata)162 static AvahiTimeout* q_timeout_new(const AvahiPoll *api, const struct timeval *tv, AvahiTimeoutCallback callback,
163 void *userdata)
164 {
165 return new AvahiTimeout(tv, callback, userdata);
166 }
167
q_timeout_update(AvahiTimeout * t,const struct timeval * tv)168 static void q_timeout_update(AvahiTimeout *t, const struct timeval *tv)
169 {
170 t->update(tv);
171 }
172
q_timeout_free(AvahiTimeout * t)173 static void q_timeout_free(AvahiTimeout *t)
174 {
175 delete t;
176 }
177
avahi_qt_poll_get(void)178 const AvahiPoll* avahi_qt_poll_get(void)
179 {
180 static const AvahiPoll qt_poll = {
181 NULL,
182 q_watch_new,
183 q_watch_update,
184 q_watch_get_events,
185 q_watch_free,
186 q_timeout_new,
187 q_timeout_update,
188 q_timeout_free
189 };
190
191 return &qt_poll;
192 }
193
194 #if defined(QT5)
195 #include "qt-watch.moc5"
196 #elif defined(QT4)
197 #include "qt-watch.moc4"
198 #elif defined(QT3)
199 #include "qt-watch.moc3"
200 #endif
201