CAS.hpp
Go to the documentation of this file.
1 /***************************************************************************
2  tag: Peter Soetens Tue Dec 21 22:43:07 CET 2004 CAS.hpp
3 
4  CAS.hpp - description
5  -------------------
6  begin : Tue December 21 2004
7  copyright : (C) 2004 Peter Soetens
8  email : peter.soetens@mech.kuleuven.ac.be
9 
10  ***************************************************************************
11  * This library is free software; you can redistribute it and/or *
12  * modify it under the terms of the GNU General Public *
13  * License as published by the Free Software Foundation; *
14  * version 2 of the License. *
15  * *
16  * As a special exception, you may use this file as part of a free *
17  * software library without restriction. Specifically, if other files *
18  * instantiate templates or use macros or inline functions from this *
19  * file, or you compile this file and link it with other files to *
20  * produce an executable, this file does not by itself cause the *
21  * resulting executable to be covered by the GNU General Public *
22  * License. This exception does not however invalidate any other *
23  * reasons why the executable file might be covered by the GNU General *
24  * Public License. *
25  * *
26  * This library is distributed in the hope that it will be useful, *
27  * but WITHOUT ANY WARRANTY; without even the implied warranty of *
28  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
29  * Lesser General Public License for more details. *
30  * *
31  * You should have received a copy of the GNU General Public *
32  * License along with this library; if not, write to the Free Software *
33  * Foundation, Inc., 59 Temple Place, *
34  * Suite 330, Boston, MA 02111-1307 USA *
35  * *
36  ***************************************************************************/
37 
38 
39 #ifndef OS_COMMON_CAS_HPP
40 #define OS_COMMON_CAS_HPP
41 
42 #include "oro_arch.h"
43 
44 namespace RTT
45 { namespace os {
53  template< class T, class V, class W >
54  inline bool CAS( volatile T* addr, const V& expected, const W& value) {
55  return expected == oro_cmpxchg(addr, expected, value);
56  }
57 
61  inline bool CAS( volatile oro_atomic_t* addr, const int expected, const int value) {
62  // assume that oro_atomic_read(addr) returns a reference
63  volatile int &ref = oro_atomic_read(addr);
64  return expected == oro_cmpxchg(&ref, expected, value);
65  }
66 
67 }}
68 
69 #endif
int oro_atomic_read(oro_atomic_t *a)
#define oro_cmpxchg(ptr, o, n)
bool CAS(volatile T *addr, const V &expected, const W &value)
Definition: CAS.hpp:54
Contains TaskContext, Activity, OperationCaller, Operation, Property, InputPort, OutputPort, Attribute.
Definition: Activity.cpp:53


rtt
Author(s): RTT Developers
autogenerated on Fri Oct 25 2019 03:59:31