1 /** 2 * @copyright 3 * ==================================================================== 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 * ==================================================================== 21 * @endcopyright 22 */ 23 24 #ifndef SVNXX_PRIVATE_INIT_HPP 25 #define SVNXX_PRIVATE_INIT_HPP 26 27 #include <memory> 28 #include <mutex> 29 #include <stdexcept> 30 31 #include <apr_pools.h> 32 33 #include "svnxx/init.hpp" 34 #include "svnxx/detail/noncopyable.hpp" 35 36 namespace apache { 37 namespace subversion { 38 namespace svnxx { 39 namespace detail { 40 41 class global_state : noncopyable 42 { 43 public: 44 using ptr = std::shared_ptr<global_state>; 45 using weak_ptr = std::weak_ptr<global_state>; 46 47 ~global_state(); 48 49 static ptr create(); get()50 static ptr get() 51 { 52 auto state = self.lock(); 53 if (!state) 54 { 55 throw std::logic_error( 56 "The SVN++ library is not initialized." 57 " Did you forget to create an instance of " 58 " the apache::subversion::svnxx::init class?"); 59 } 60 return state; 61 } 62 get_root_pool() const63 apr_pool_t* get_root_pool() const noexcept 64 { 65 return root_pool; 66 } 67 68 private: 69 // Thou shalt not create global_states other than through the factory. 70 global_state(); 71 72 apr_pool_t* root_pool{nullptr}; 73 74 static std::mutex guard; 75 static weak_ptr self; 76 }; 77 78 } // namespace detail 79 } // namespace svnxx 80 } // namespace subversion 81 } // namespace apache 82 83 #endif // SVNXX_PRIVATE_INIT_HPP 84