1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
dbx_tree: tree database driver for Miranda IM
Copyright 2007-2010 Michael "Protogenes" Kunz,
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#pragma once
#include "Interface.h"
#include "FileBTree.h"
#include "MREWSync.h"
#include "sigslot.h"
#include "IterationHeap.h"
#include <queue>
#include "lockfree_hashmap.h"
class CSettings;
class CSettingsTree;
#include "Entities.h"
#pragma pack(push, 1) // push current alignment to stack, set alignment to 1 byte boundary
/**
\brief Key Type of the SettingsBTree
The setting names (ASCII) are hashed, so that they can easily be accessed.
**/
typedef struct TSettingKey {
uint32_t Hash; /// 32 bit hash of the Setting name
TDBTSettingHandle Setting;
bool operator < (const TSettingKey & Other) const
{
if (Hash != Other.Hash) return Hash < Other.Hash;
if (Setting != Other.Setting) return Setting < Other.Setting;
return false;
}
//bool operator <= (const TSettingKey & Other);
bool operator == (const TSettingKey & Other) const
{
return (Hash == Other.Hash) && (Setting == Other.Setting);
}
//bool operator >= (const TSettingKey & Other);
bool operator > (const TSettingKey & Other) const
{
if (Hash != Other.Hash) return Hash > Other.Hash;
if (Setting != Other.Setting) return Setting > Other.Setting;
return false;
}
} TSettingKey;
static const uint32_t cSettingSignature = 0xF5B87A3D;
static const uint16_t cSettingNodeSignature = 0xBA12;
/**
\brief The data of a setting
A setting's data is variable length. The data is a TSetting-structure followed by variable length data.
- fixed data
- SettingName (ASCII)
- maybe blob data
**/
typedef struct TSetting {
TDBTEntityHandle Entity; /// Settings' Entity
uint32_t Flags; /// flags
uint16_t Type; /// setting type
uint16_t NameLength; /// settingname length
union {
union {
bool Bool;
int8_t Char; uint8_t Byte;
int16_t Short; uint16_t Word;
uint32_t Int; uint32_t DWord;
int64_t Int64; uint64_t QWord;
float Float;
double Double;
} Value; /// if type is fixed length, the data is stored right here
struct {
uint32_t BlobLength; /// if type is variable length this describes the length of the data in bytes
uint32_t AllocSize; /// this is the allocated space for the blob ALWAYS in byte! this prevents us to realloc it too often
};
};
uint8_t Reserved[8];
// settingname with terminating NULL
// blob
} TSetting;
#pragma pack(pop)
/**
\brief Manages the Settings in the Database
**/
class CSettingsTree : public CFileBTree<TSettingKey, 8>
{
protected:
TDBTEntityHandle m_Entity;
CSettings & m_Owner;
public:
CSettingsTree(CSettings & Owner, CBlockManager & BlockManager, TNodeRef RootNode, TDBTEntityHandle Entity)
: CFileBTree<TSettingKey, 8>(BlockManager, RootNode, cSettingNodeSignature),
m_Owner(Owner),
m_Entity(Entity)
{
};
~CSettingsTree()
{
};
TDBTEntityHandle Entity()
{
return m_Entity;
};
void Entity(TDBTEntityHandle NewEntity)
{
m_Entity = NewEntity;
};
TDBTSettingHandle _FindSetting(const uint32_t Hash, const char * Name, const uint32_t Length);
bool _DeleteSetting(const uint32_t Hash, const TDBTSettingHandle hSetting);
bool _AddSetting(const uint32_t Hash, const TDBTSettingHandle hSetting);
};
/**
\brief Manages all Settings and provides access to them
**/
class CSettings : public sigslot::has_slots<>
{
public:
typedef sigslot::signal2<CSettings*, CSettingsTree::TNodeRef> TOnRootChanged;
static const uint32_t cSettingsFileFlag = 0x00000001;
CSettings(
CBlockManager & BlockManagerSet,
CBlockManager & BlockManagerPri,
CSettingsTree::TNodeRef SettingsRoot,
CEntities & Entities
);
virtual ~CSettings();
TOnRootChanged & sigRootChanged()
{
return m_sigRootChanged;
};
bool _ReadSettingName(CBlockManager & BlockManager, TDBTSettingHandle Setting, uint16_t & NameLength, char *& NameBuf);
void _EnsureModuleExists(char * Module);
// compatibility:
typedef int (*DBMODULEENUMPROC)(const char *szModuleName,DWORD ofsModuleName,LPARAM lParam);
int CompEnumModules(DBMODULEENUMPROC CallBack, LPARAM lParam);
// services:
TDBTSettingHandle FindSetting(TDBTSettingDescriptor & Descriptor);
unsigned int DeleteSetting(TDBTSettingDescriptor & Descriptor);
unsigned int DeleteSetting(TDBTSettingHandle hSetting);
TDBTSettingHandle WriteSetting(TDBTSetting & Setting);
TDBTSettingHandle WriteSetting(TDBTSetting & Setting, TDBTSettingHandle hSetting);
unsigned int ReadSetting(TDBTSetting & Setting);
unsigned int ReadSetting(TDBTSetting & Setting, TDBTSettingHandle hSetting);
TDBTSettingIterationHandle IterationInit(TDBTSettingIterFilter & Filter);
TDBTSettingHandle IterationNext(TDBTSettingIterationHandle Iteration);
unsigned int IterationClose(TDBTSettingIterationHandle Iteration);
private:
typedef lockfree::hash_map<TDBTEntityHandle, CSettingsTree*> TSettingsTreeMap;
typedef CIterationHeap<CSettingsTree::iterator> TSettingsHeap;
CBlockManager & m_BlockManagerSet;
CBlockManager & m_BlockManagerPri;
CEntities & m_Entities;
TSettingsTreeMap m_SettingsMap;
typedef struct TSettingIterationResult {
TDBTSettingHandle Handle;
TDBTEntityHandle Entity;
char * Name;
uint16_t NameLen;
} TSettingIterationResult;
typedef struct TSettingIteration {
TDBTSettingIterFilter Filter;
uint16_t FilterNameStartLength;
TSettingsHeap * Heap;
std::queue<TSettingIterationResult> * Frame;
bool LockSetting;
bool LockPrivate;
} TSettingIteration, *PSettingIteration;
TOnRootChanged m_sigRootChanged;
void onRootChanged(void* SettingsTree, CSettingsTree::TNodeRef NewRoot);
void onDeleteSettingCallback(void * Tree, const TSettingKey & Key, uint32_t Param);
void onDeleteSettings(CEntities * Entities, TDBTEntityHandle hEntity);
void onMergeSettingCallback(void * Tree, const TSettingKey & Key, uint32_t Param);
void onMergeSettings(CEntities * Entities, TDBTEntityHandle Source, TDBTEntityHandle Dest);
CSettingsTree * getSettingsTree(TDBTEntityHandle hEntity);
typedef lockfree::hash_multimap<uint16_t, char *> TModulesMap;
TModulesMap m_Modules;
void _LoadModules();
};
|