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geventloop.cpp
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1 //
2 // Copyright (C) 2001-2013 Graeme Walker <graeme_walker@users.sourceforge.net>
3 //
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
8 //
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with this program. If not, see <http://www.gnu.org/licenses/>.
16 // ===
17 //
18 // geventloop.cpp
19 //
20
21 #include "gdef.h"
22 #include "gnet.h"
23 #include "geventloop.h"
24 #include "gdebug.h"
25 #include "gassert.h"
26
27 GNet::EventLoop * GNet::EventLoop::m_this = NULL ;
28
29 GNet::EventLoop::EventLoop()
30 {
31 if( m_this == NULL )
32 m_this = this ;
33 else
34 G_WARNING( "GNet::EventLoop::ctor: multiple instances" ) ;
35 }
36
37 GNet::EventLoop::~EventLoop()
38 {
39 if( m_this == this )
40 m_this = NULL ;
41 }
42
43 GNet::EventLoop & GNet::EventLoop::instance()
44 {
45 if( m_this == NULL )
46 throw NoInstance() ;
47 G_ASSERT( m_this != NULL ) ;
48 return *m_this ;
49 }
50
51 bool GNet::EventLoop::exists()
52 {
53 return m_this != NULL ;
54 }
55
GNet::EventLoop
An abstract base class for a singleton that keeps track of open sockets and their associated handlers...
Definition: geventloop.h:51
geventloop.h
G_ASSERT
#define G_ASSERT(test)
Definition: gassert.h:30
gassert.h
GNet::EventLoop::EventLoop
EventLoop()
Constructor.
Definition: geventloop.cpp:29
GNet::EventLoop::exists
static bool exists()
Returns true if an instance exists.
Definition: geventloop.cpp:51
GNet::EventLoop::~EventLoop
virtual ~EventLoop()
Destructor.
Definition: geventloop.cpp:37
GNet::EventLoop::instance
static EventLoop & instance()
Returns a reference to an instance of the class, if any.
Definition: geventloop.cpp:43
G_WARNING
#define G_WARNING(expr)
Definition: glog.h:107
gdebug.h