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 _SALHELPER_FUTURE_HXX_ 25 #define _SALHELPER_FUTURE_HXX_ 26 27 #include <sal/types.h> 28 #include <osl/diagnose.h> 29 #include <osl/conditn.hxx> 30 #include <salhelper/refobj.hxx> 31 32 namespace salhelper 33 { 34 35 //---------------------------------------------------------------------------- 36 37 #ifndef SALHELPER_COPYCTOR_API 38 #define SALHELPER_COPYCTOR_API(C) C (const C&); C& operator= (const C&) 39 #endif 40 41 //---------------------------------------------------------------------------- 42 43 template<class value_type> 44 class FutureValue : protected osl::Condition 45 { 46 /** Representation. 47 */ 48 value_type m_aValue; 49 50 /** Not implemented. 51 */ 52 SALHELPER_COPYCTOR_API(FutureValue<value_type>); 53 54 public: 55 inline FutureValue (const value_type& value = value_type()) SAL_THROW(()) 56 : m_aValue (value) 57 { 58 Condition::reset(); 59 } 60 61 inline ~FutureValue() SAL_THROW(()) 62 {} 63 is() const64 inline sal_Bool is() const SAL_THROW(()) 65 { 66 return const_cast<FutureValue*>(this)->check(); 67 } 68 set(const value_type & value)69 inline void set (const value_type& value) SAL_THROW(()) 70 { 71 m_aValue = value; 72 Condition::set(); 73 } 74 get()75 inline value_type& get() SAL_THROW(()) 76 { 77 Condition::wait(); 78 return m_aValue; 79 } 80 }; 81 82 //---------------------------------------------------------------------------- 83 84 template<class value_type> 85 class Future : public salhelper::ReferenceObject 86 { 87 /** Representation. 88 */ 89 FutureValue<value_type> m_aValue; 90 91 /** Not implemented. 92 */ 93 SALHELPER_COPYCTOR_API(Future<value_type>); 94 95 public: 96 inline Future (const value_type& value = value_type()) SAL_THROW(()) 97 : m_aValue (value) 98 {} 99 set(const value_type & value)100 inline void set (const value_type& value) SAL_THROW(()) 101 { 102 OSL_PRECOND(!m_aValue.is(), "Future::set(): value already set"); 103 m_aValue.set (value); 104 } 105 get()106 inline value_type& get() SAL_THROW(()) 107 { 108 return m_aValue.get(); 109 } 110 }; 111 112 //---------------------------------------------------------------------------- 113 114 } // namespace salhelper 115 116 #endif /* !_SALHELPER_FUTURE_HXX_ */ 117