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 "obj_ptr.h" 29#include "object_callbacks.h" 30 31namespace art { 32namespace mirror { 33class Object; 34} // namespace mirror 35 36// Maintain a table of references. Used for JNI monitor references and 37// JNI pinned array references. 38// 39// None of the functions are synchronized. 40class ReferenceTable { 41 public: 42 ReferenceTable(const char* name, size_t initial_size, size_t max_size); 43 ~ReferenceTable(); 44 45 void Add(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_); 46 47 void Remove(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_); 48 49 size_t Size() const; 50 51 void Dump(std::ostream& os) REQUIRES_SHARED(Locks::mutator_lock_); 52 53 void VisitRoots(RootVisitor* visitor, const RootInfo& root_info) 54 REQUIRES_SHARED(Locks::mutator_lock_); 55 56 private: 57 typedef std::vector<GcRoot<mirror::Object>, 58 TrackingAllocator<GcRoot<mirror::Object>, kAllocatorTagReferenceTable>> Table; 59 static void Dump(std::ostream& os, Table& entries) 60 REQUIRES_SHARED(Locks::mutator_lock_); 61 friend class IndirectReferenceTable; // For Dump. 62 63 std::string name_; 64 Table entries_; 65 size_t max_size_; 66}; 67 68} // namespace art 69 70#endif // ART_RUNTIME_REFERENCE_TABLE_H_ 71