Lunchbox  1.8.0
lockable.h
1 
2 /* Copyright (c) 2009-2012, Stefan Eilemann <eile@equalizergraphics.com>
3  *
4  * This library is free software; you can redistribute it and/or modify it under
5  * the terms of the GNU Lesser General Public License version 2.1 as published
6  * by the Free Software Foundation.
7  *
8  * This library is distributed in the hope that it will be useful, but WITHOUT
9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
10  * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
11  * details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this library; if not, write to the Free Software Foundation, Inc.,
15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16  */
17 
18 #ifndef LUNCHBOX_LOCKABLE_H
19 #define LUNCHBOX_LOCKABLE_H
20 
21 #include <lunchbox/log.h> // used inline
22 #include <lunchbox/nonCopyable.h> // base class
23 #include <iostream>
24 
25 namespace lunchbox
26 {
32  template< class D, class L = Lock > class Lockable : public NonCopyable
33  {
34  public:
36  explicit Lockable() {}
37 
39  explicit Lockable( const D& value ) : data( value ) {}
40 
42  template< class P1 > Lockable( const P1& p1 ) : data( p1 ) {}
43 
45  D* operator->() { return &data; }
46 
48  const D* operator->() const { return &data; }
49 
51  D& operator *() { return data; }
52 
54  const D& operator*() const { return data; }
55 
57  bool operator == ( const D& rhs ) const { return ( data == rhs ); }
58 
60  Lockable& operator = ( const D& rhs ) { data = rhs; return *this; }
61 
62  D data;
63  mutable L lock;
64  };
65 
67  template< class D, class L >
68  inline std::ostream& operator << ( std::ostream& os,
69  const Lockable<D, L>& l )
70  {
71  os << disableFlush << "<" << l.lock.isSet() << " " << l.data << ">"
72  << enableFlush;
73  return os;
74  }
75 }
76 #endif // LUNCHBOX_LOCKABLE_H