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 DBAUI_ASYNCRONOUSLINK_HXX 25 #define DBAUI_ASYNCRONOUSLINK_HXX 26 27 #include <tools/link.hxx> 28 #include <osl/mutex.hxx> 29 30 namespace dbaui 31 { 32 // ========================================================================= 33 // a helper for multi-threaded handling of async events 34 // ------------------------------------------------------------------------- 35 /** handles asynchronous links which may be called in multi-threaded environments 36 If you use an instance of this class as member of your own class, it will handle 37 several crucial points for you (for instance the case that somebody posts the 38 event while another thread tries to delete this event in the _destructor_ of the 39 class). 40 */ 41 class OAsyncronousLink 42 { 43 Link m_aHandler; 44 45 protected: 46 ::osl::Mutex m_aEventSafety; 47 ::osl::Mutex m_aDestructionSafety; 48 sal_uLong m_nEventId; 49 50 public: 51 /** constructs the object 52 @param _rHandler The link to be called asyncronously 53 */ 54 OAsyncronousLink( const Link& _rHandler ); 55 virtual ~OAsyncronousLink(); 56 IsRunning() const57 bool IsRunning() const { return m_nEventId != 0; } 58 59 void Call( void* _pArgument = NULL ); 60 void CancelCall(); 61 62 protected: 63 DECL_LINK(OnAsyncCall, void*); 64 }; 65 } 66 #endif // DBAUI_ASYNCRONOUSLINK_HXX 67 68