Chris@1729
|
1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
|
Chris@1729
|
2
|
Chris@1729
|
3 /*
|
Chris@1729
|
4 Sonic Visualiser
|
Chris@1729
|
5 An audio file viewer and annotation editor.
|
Chris@1729
|
6 Centre for Digital Music, Queen Mary, University of London.
|
Chris@1729
|
7
|
Chris@1729
|
8 This program is free software; you can redistribute it and/or
|
Chris@1729
|
9 modify it under the terms of the GNU General Public License as
|
Chris@1729
|
10 published by the Free Software Foundation; either version 2 of the
|
Chris@1729
|
11 License, or (at your option) any later version. See the file
|
Chris@1729
|
12 COPYING included with this distribution for more information.
|
Chris@1729
|
13 */
|
Chris@1729
|
14
|
Chris@1729
|
15 #ifndef SV_BY_ID_H
|
Chris@1729
|
16 #define SV_BY_ID_H
|
Chris@1729
|
17
|
Chris@1734
|
18 #include "Debug.h"
|
Chris@1734
|
19
|
Chris@1729
|
20 #include <memory>
|
Chris@1729
|
21 #include <map>
|
Chris@1731
|
22 #include <typeinfo>
|
Chris@1731
|
23 #include <iostream>
|
Chris@1731
|
24 #include <climits>
|
Chris@1729
|
25
|
Chris@1729
|
26 #include <QMutex>
|
Chris@1731
|
27 #include <QString>
|
Chris@1729
|
28
|
Chris@1731
|
29 template <typename T>
|
Chris@1731
|
30 struct SvId {
|
Chris@1735
|
31
|
Chris@1731
|
32 int id;
|
Chris@1729
|
33
|
Chris@1735
|
34 enum {
|
Chris@1735
|
35 // The value NO_ID (-1) is never allocated by WithId
|
Chris@1735
|
36 NO_ID = -1
|
Chris@1735
|
37 };
|
Chris@1735
|
38
|
Chris@1735
|
39 SvId() : id(NO_ID) {}
|
Chris@1735
|
40
|
Chris@1735
|
41 SvId(const SvId &) =default;
|
Chris@1735
|
42 SvId &operator=(const SvId &) =default;
|
Chris@1735
|
43
|
Chris@1735
|
44 bool operator==(const SvId &other) const { return id == other.id; }
|
Chris@1731
|
45 bool operator<(const SvId &other) const { return id < other.id; }
|
Chris@1731
|
46
|
Chris@1735
|
47 bool isNone() const { return id == NO_ID; }
|
Chris@1735
|
48
|
Chris@1731
|
49 QString toString() const {
|
Chris@1731
|
50 return QString("%1").arg(id);
|
Chris@1731
|
51 }
|
Chris@1731
|
52 };
|
Chris@1731
|
53
|
Chris@1731
|
54 template <typename T>
|
Chris@1729
|
55 class WithId
|
Chris@1729
|
56 {
|
Chris@1729
|
57 public:
|
Chris@1731
|
58 typedef SvId<T> Id;
|
Chris@1731
|
59
|
Chris@1729
|
60 WithId() :
|
Chris@1729
|
61 m_id(getNextId()) {
|
Chris@1729
|
62 }
|
Chris@1729
|
63
|
Chris@1731
|
64 /**
|
Chris@1731
|
65 * Return an id for this object. The id is a unique identifier for
|
Chris@1731
|
66 * this object among all objects that implement WithId within this
|
Chris@1731
|
67 * single run of the application.
|
Chris@1731
|
68 */
|
Chris@1729
|
69 Id getId() const {
|
Chris@1731
|
70 Id id;
|
Chris@1731
|
71 id.id = m_id;
|
Chris@1731
|
72 return id;
|
Chris@1729
|
73 }
|
Chris@1729
|
74
|
Chris@1729
|
75 private:
|
Chris@1731
|
76 int m_id;
|
Chris@1731
|
77
|
Chris@1731
|
78 static int getNextId() {
|
Chris@1731
|
79 static int nextId = 0;
|
Chris@1731
|
80 static QMutex mutex;
|
Chris@1731
|
81 QMutexLocker locker(&mutex);
|
Chris@1731
|
82 int i = nextId;
|
Chris@1731
|
83 if (nextId == INT_MAX) {
|
Chris@1731
|
84 nextId = INT_MIN;
|
Chris@1735
|
85 } else {
|
Chris@1735
|
86 ++nextId;
|
Chris@1735
|
87 if (nextId == 0 || nextId == Id::NO_ID) {
|
Chris@1735
|
88 throw std::runtime_error("Internal ID limit exceeded!");
|
Chris@1735
|
89 }
|
Chris@1731
|
90 }
|
Chris@1731
|
91 return i;
|
Chris@1731
|
92 }
|
Chris@1729
|
93 };
|
Chris@1729
|
94
|
Chris@1731
|
95 template <typename Item, typename Id>
|
Chris@1729
|
96 class ById
|
Chris@1729
|
97 {
|
Chris@1729
|
98 public:
|
Chris@1731
|
99 ~ById() {
|
Chris@1731
|
100 QMutexLocker locker(&m_mutex);
|
Chris@1731
|
101 for (const auto &p: m_items) {
|
Chris@1731
|
102 if (p.second && p.second.use_count() > 0) {
|
Chris@1734
|
103 SVCERR << "WARNING: ById map destroyed with use count of "
|
Chris@1734
|
104 << p.second.use_count() << " for item with type "
|
Chris@1734
|
105 << typeid(*p.second.get()).name()
|
Chris@1734
|
106 << " and id " << p.first.id << endl;
|
Chris@1731
|
107 }
|
Chris@1731
|
108 }
|
Chris@1731
|
109 }
|
Chris@1731
|
110
|
Chris@1729
|
111 void add(std::shared_ptr<Item> item) {
|
Chris@1729
|
112 QMutexLocker locker(&m_mutex);
|
Chris@1734
|
113 auto id = item->getId();
|
Chris@1734
|
114 if (m_items.find(id) != m_items.end()) {
|
Chris@1734
|
115 SVCERR << "WARNING: ById::add: item with id " << id
|
Chris@1734
|
116 << " is already recorded, replacing it (item type is "
|
Chris@1734
|
117 << typeid(*item.get()).name() << ")" << endl;
|
Chris@1734
|
118 }
|
Chris@1734
|
119 m_items[id] = item;
|
Chris@1729
|
120 }
|
Chris@1729
|
121
|
Chris@1729
|
122 void
|
Chris@1729
|
123 release(Id id) {
|
Chris@1729
|
124 QMutexLocker locker(&m_mutex);
|
Chris@1729
|
125 m_items.erase(id);
|
Chris@1729
|
126 }
|
Chris@1729
|
127
|
Chris@1729
|
128 std::shared_ptr<Item> get(Id id) const {
|
Chris@1729
|
129 QMutexLocker locker(&m_mutex);
|
Chris@1729
|
130 const auto &itr = m_items.find(id);
|
Chris@1729
|
131 if (itr != m_items.end()) {
|
Chris@1729
|
132 return itr->second;
|
Chris@1729
|
133 } else {
|
Chris@1729
|
134 return std::shared_ptr<Item>();
|
Chris@1729
|
135 }
|
Chris@1729
|
136 }
|
Chris@1729
|
137
|
Chris@1729
|
138 template <typename Derived>
|
Chris@1729
|
139 std::shared_ptr<Derived> getAs(Id id) const {
|
Chris@1729
|
140 return std::dynamic_pointer_cast<Derived>(get(id));
|
Chris@1729
|
141 }
|
Chris@1729
|
142
|
Chris@1729
|
143 private:
|
Chris@1729
|
144 mutable QMutex m_mutex;
|
Chris@1729
|
145 std::map<Id, std::shared_ptr<Item>> m_items;
|
Chris@1729
|
146 };
|
Chris@1729
|
147
|
Chris@1731
|
148 template <typename Item, typename Id>
|
Chris@1731
|
149 class StaticById
|
Chris@1729
|
150 {
|
Chris@1729
|
151 public:
|
Chris@1731
|
152 static void add(std::shared_ptr<Item> imagined) {
|
Chris@1731
|
153 byId().add(imagined);
|
Chris@1729
|
154 }
|
Chris@1729
|
155
|
Chris@1729
|
156 static void release(Id id) {
|
Chris@1731
|
157 byId().release(id);
|
Chris@1729
|
158 }
|
Chris@1729
|
159
|
Chris@1731
|
160 static std::shared_ptr<Item> get(Id id) {
|
Chris@1731
|
161 return byId().get(id);
|
Chris@1729
|
162 }
|
Chris@1729
|
163
|
Chris@1729
|
164 template <typename Derived>
|
Chris@1729
|
165 static
|
Chris@1729
|
166 std::shared_ptr<Derived> getAs(Id id) {
|
Chris@1731
|
167 return std::dynamic_pointer_cast<Derived>(get(id));
|
Chris@1729
|
168 }
|
Chris@1729
|
169
|
Chris@1729
|
170 private:
|
Chris@1731
|
171 static
|
Chris@1731
|
172 ById<Item, Id> &byId() {
|
Chris@1731
|
173 static ById<Item, Id> b;
|
Chris@1731
|
174 return b;
|
Chris@1731
|
175 }
|
Chris@1729
|
176 };
|
Chris@1731
|
177
|
Chris@1729
|
178 #endif
|
Chris@1729
|
179
|