Apache Qpid - AMQP Messaging for Java JMS, C++, Python, Ruby, and .NET | Apache Qpid Documentation |
00001 #ifndef QMF_HANDLE_H 00002 #define QMF_HANDLE_H 00003 00004 /* 00005 * 00006 * Licensed to the Apache Software Foundation (ASF) under one 00007 * or more contributor license agreements. See the NOTICE file 00008 * distributed with this work for additional information 00009 * regarding copyright ownership. The ASF licenses this file 00010 * to you under the Apache License, Version 2.0 (the 00011 * "License"); you may not use this file except in compliance 00012 * with the License. You may obtain a copy of the License at 00013 * 00014 * http://www.apache.org/licenses/LICENSE-2.0 00015 * 00016 * Unless required by applicable law or agreed to in writing, 00017 * software distributed under the License is distributed on an 00018 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 00019 * KIND, either express or implied. See the License for the 00020 * specific language governing permissions and limitations 00021 * under the License. 00022 * 00023 */ 00024 00025 #if !defined(QMF_USE_DEPRECATED_API) && !defined(qmf2_EXPORTS) && !defined(SWIG) 00026 # error "The API defined in this file has been DEPRECATED and will be removed in the future." 00027 # error "Define 'QMF_USE_DEPRECATED_API' to enable continued use of the API." 00028 #endif 00029 00030 #include "qmf/ImportExport.h" 00031 00032 namespace qmf { 00033 00034 template <class> class PrivateImplRef; 00035 00043 template <class T> class Handle { 00044 public: 00045 00047 QMF_INLINE_EXTERN bool isValid() const { return impl; } 00048 00050 QMF_INLINE_EXTERN bool isNull() const { return !impl; } 00051 00053 QMF_INLINE_EXTERN operator bool() const { return impl; } 00054 00056 QMF_INLINE_EXTERN bool operator !() const { return !impl; } 00057 00058 void swap(Handle<T>& h) { T* t = h.impl; h.impl = impl; impl = t; } 00059 00060 protected: 00061 typedef T Impl; 00062 QMF_INLINE_EXTERN Handle() :impl() {} 00063 00064 // Not implemented,subclasses must implement. 00065 QMF_EXTERN Handle(const Handle&); 00066 QMF_EXTERN Handle& operator=(const Handle&); 00067 00068 Impl* impl; 00069 00070 friend class PrivateImplRef<T>; 00071 }; 00072 00073 } // namespace qmf 00074 00075 #endif