1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_REFERENCE_TABLE_H_ 18 #define ART_RUNTIME_REFERENCE_TABLE_H_ 19 20 #include <cstddef> 21 #include <iosfwd> 22 #include <string> 23 #include <vector> 24 25 #include "base/allocator.h" 26 #include "base/mutex.h" 27 #include "gc_root.h" 28 #include "object_callbacks.h" 29 30 namespace art { 31 namespace mirror { 32 class Object; 33 } // namespace mirror 34 35 // Maintain a table of references. Used for JNI monitor references and 36 // JNI pinned array references. 37 // 38 // None of the functions are synchronized. 39 class ReferenceTable { 40 public: 41 ReferenceTable(const char* name, size_t initial_size, size_t max_size); 42 ~ReferenceTable(); 43 44 void Add(mirror::Object* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 45 46 void Remove(mirror::Object* obj) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 47 48 size_t Size() const; 49 50 void Dump(std::ostream& os) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 51 52 void VisitRoots(RootCallback* visitor, void* arg, const RootInfo& root_info); 53 54 private: 55 typedef std::vector<GcRoot<mirror::Object>, 56 TrackingAllocator<GcRoot<mirror::Object>, kAllocatorTagReferenceTable>> Table; 57 static void Dump(std::ostream& os, Table& entries) 58 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 59 friend class IndirectReferenceTable; // For Dump. 60 61 std::string name_; 62 Table entries_; 63 size_t max_size_; 64 }; 65 66 } // namespace art 67 68 #endif // ART_RUNTIME_REFERENCE_TABLE_H_ 69
