Qpid C++ Messaging API  0.26
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
Handle.h
Go to the documentation of this file.
1 #ifndef QPID_MESSAGING_HANDLE_H
2 #define QPID_MESSAGING_HANDLE_H
3 
4 /*
5  *
6  * Licensed to the Apache Software Foundation (ASF) under one
7  * or more contributor license agreements. See the NOTICE file
8  * distributed with this work for additional information
9  * regarding copyright ownership. The ASF licenses this file
10  * to you under the Apache License, Version 2.0 (the
11  * "License"); you may not use this file except in compliance
12  * with the License. You may obtain a copy of the License at
13  *
14  * http://www.apache.org/licenses/LICENSE-2.0
15  *
16  * Unless required by applicable law or agreed to in writing,
17  * software distributed under the License is distributed on an
18  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
19  * KIND, either express or implied. See the License for the
20  * specific language governing permissions and limitations
21  * under the License.
22  *
23  */
24 
26 
27 namespace qpid {
28 namespace messaging {
29 
30 template <class> class PrivateImplRef;
31 
39 template <class T> class Handle {
40  public:
41 
43  QPID_MESSAGING_INLINE_EXTERN bool isValid() const { return impl; }
44 
46  QPID_MESSAGING_INLINE_EXTERN bool isNull() const { return !impl; }
47 
49  QPID_MESSAGING_INLINE_EXTERN operator bool() const { return impl; }
50 
52  QPID_MESSAGING_INLINE_EXTERN bool operator !() const { return !impl; }
53 
54  void swap(Handle<T>& h) { T* t = h.impl; h.impl = impl; impl = t; }
55 
56  private:
57  // Not implemented, subclasses must implement.
58  Handle(const Handle&);
59  Handle& operator=(const Handle&);
60 
61  protected:
62  typedef T Impl;
64 
66 
67  friend class PrivateImplRef<T>;
68 };
69 
70 }} // namespace qpid::messaging
71 
72 #endif
QPID_MESSAGING_INLINE_EXTERN Handle()
Definition: Handle.h:63
#define QPID_MESSAGING_INLINE_EXTERN
Definition: ImportExport.h:32
void swap(Handle< T > &h)
Definition: Handle.h:54
Definition: Connection.h:36
QPID_MESSAGING_INLINE_EXTERN bool isNull() const
Definition: Handle.h:46
QPID_MESSAGING_INLINE_EXTERN bool operator!() const
Definition: Handle.h:52
Definition: Handle.h:39
Impl * impl
Definition: Handle.h:65
T Impl
Definition: Handle.h:62
QPID_MESSAGING_INLINE_EXTERN bool isValid() const
Definition: Handle.h:43