1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #ifndef IINTERFACE_HXX_INCLUDED 25 #define IINTERFACE_HXX_INCLUDED 26 27 #include <sal/types.h> 28 29 /** The base interface 30 */ 31 class IInterface 32 { 33 public: 34 35 /** Acquire a reference to an instance. A caller shall release 36 the instance by calling 'release' when it is no longer needed. 37 'acquire' and 'release' calls need to be balanced. 38 39 @returns 40 the current reference count of the instance for debugging purposes. 41 */ 42 virtual sal_Int32 acquire() = 0; 43 44 /** Releases a reference to an instance. A caller has to call 45 'release' when a before acquired reference to an instance 46 is no longer needed. 'acquire' and 'release' calls need to 47 be balanced. 48 49 @returns 50 the current reference count of the instance for debugging purposes. 51 */ 52 virtual sal_Int32 release() = 0; 53 54 /** Returns the current reference count. This method should be used for 55 debugging purposes. Using it otherwise is a signal of a design flaw. 56 */ 57 virtual sal_Int32 getReferenceCount() const = 0; 58 59 protected: ~IInterface()60 virtual ~IInterface() {}; 61 }; 62 63 #endif // IDOCUMENT_HXX_INCLUDED 64