reference_table.h revision 7940e44f4517de5e2634a7e07d58d0fb26160513 
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_SRC_REFERENCE_TABLE_H_
18#define ART_SRC_REFERENCE_TABLE_H_
19
20#include <cstddef>
21#include <iosfwd>
22#include <string>
23#include <vector>
24
25#include "locks.h"
26#include "root_visitor.h"
27
28namespace art {
29namespace mirror {
30class Object;
31}  // namespace mirror
32
33// Maintain a table of references.  Used for JNI monitor references and
34// JNI pinned array references.
35//
36// None of the functions are synchronized.
37class ReferenceTable {
38 public:
39  ReferenceTable(const char* name, size_t initial_size, size_t max_size);
40  ~ReferenceTable();
41
42  void Add(const mirror::Object* obj);
43
44  void Remove(const mirror::Object* obj);
45
46  size_t Size() const;
47
48  void Dump(std::ostream& os) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
49
50  void VisitRoots(RootVisitor* visitor, void* arg);
51
52 private:
53  typedef std::vector<const mirror::Object*> Table;
54  static void Dump(std::ostream& os, const Table& entries)
55      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
56  friend class IndirectReferenceTable; // For Dump.
57
58  std::string name_;
59  Table entries_;
60  size_t max_size_;
61};
62
63}  // namespace art
64
65#endif  // ART_SRC_REFERENCE_TABLE_H_
66