RAUL  0.5.1
Command.hpp
1 /* This file is part of Raul.
2  * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
3  *
4  * Raul is free software; you can redistribute it and/or modify it under the
5  * terms of the GNU General Public License as published by the Free Software
6  * Foundation; either version 2 of the License, or (at your option) any later
7  * version.
8  *
9  * Raul is distributed in the hope that it will be useful, but WITHOUT ANY
10  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
12  *
13  * You should have received a copy of the GNU General Public License along
14  * with this program; if not, write to the Free Software Foundation, Inc.,
15  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
16  */
17 
18 #ifndef RAUL_COMMAND_HPP
19 #define RAUL_COMMAND_HPP
20 
21 #include <raul/Semaphore.hpp>
22 #include <boost/utility.hpp>
23 
24 namespace Raul {
25 
26 
37 class Command : boost::noncopyable {
38 public:
39  inline Command() : _sem(0) {}
40 
42  inline void operator()() { _sem.wait(); }
43 
45  inline bool pending() { return _sem.has_waiter(); }
46  inline void finish() { _sem.post(); }
47 
48 private:
49  Semaphore _sem;
50 };
51 
52 
53 } // namespace Raul
54 
55 #endif // RAUL_COMMAND_HPP
A blocking command to be executed in the audio thread.
Definition: Command.hpp:37
bool pending()
Execution context.
Definition: Command.hpp:45
void wait()
Wait until count is &gt; 0, then decrement.
Definition: Semaphore.hpp:69
void post()
Increment (and signal any waiters).
Definition: Semaphore.hpp:60
void operator()()
Caller context.
Definition: Command.hpp:42