Bitcoin Core  22.99.0
P2P Digital Currency
Public Member Functions | Public Attributes | List of all members
wallet::BerkeleyDatabase Class Reference

An instance of this class represents one database. More...

#include <bdb.h>

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Public Member Functions

 BerkeleyDatabase ()=delete
 
 BerkeleyDatabase (std::shared_ptr< BerkeleyEnvironment > env, std::string filename)
 Create DB handle to real database. More...
 
 ~BerkeleyDatabase () override
 
void Open () override
 Open the database if it is not already opened. More...
 
bool Rewrite (const char *pszSkip=nullptr) override
 Rewrite the entire database on disk, with the exception of key pszSkip if non-zero. More...
 
void AddRef () override
 Indicate that a new database user has begun using the database. More...
 
void RemoveRef () override
 Indicate that database user has stopped using the database and that it could be flushed or closed. More...
 
bool Backup (const std::string &strDest) const override
 Back up the entire database to a file. More...
 
void Flush () override
 Make sure all changes are flushed to database file. More...
 
void Close () override
 Flush to the database file and close the database. More...
 
bool PeriodicFlush () override
 
void IncrementUpdateCounter () override
 
void ReloadDbEnv () override
 
bool Verify (bilingual_str &error)
 Verifies the environment and database file. More...
 
std::string Filename () override
 Return path to main database filename. More...
 
std::string Format () override
 
std::unique_ptr< DatabaseBatchMakeBatch (bool flush_on_close=true) override
 Make a BerkeleyBatch connected to this database. More...
 
- Public Member Functions inherited from wallet::WalletDatabase
 WalletDatabase ()
 Create dummy DB handle. More...
 
virtual ~WalletDatabase ()
 

Public Attributes

std::shared_ptr< BerkeleyEnvironmentenv
 Pointer to shared database environment. More...
 
std::unique_ptr< Db > m_db
 Database pointer. More...
 
std::string strFile
 
- Public Attributes inherited from wallet::WalletDatabase
std::atomic< int > m_refcount {0}
 Counts the number of active database users to be sure that the database is not closed while someone is using it. More...
 
std::atomic< unsigned int > nUpdateCounter
 
unsigned int nLastSeen
 
unsigned int nLastFlushed
 
int64_t nLastWalletUpdate
 

Detailed Description

An instance of this class represents one database.

For BerkeleyDB this is just a (env, strFile) tuple.

Definition at line 95 of file bdb.h.

Constructor & Destructor Documentation

◆ BerkeleyDatabase() [1/2]

wallet::BerkeleyDatabase::BerkeleyDatabase ( )
delete

◆ BerkeleyDatabase() [2/2]

wallet::BerkeleyDatabase::BerkeleyDatabase ( std::shared_ptr< BerkeleyEnvironment env,
std::string  filename 
)
inline

Create DB handle to real database.

Definition at line 101 of file bdb.h.

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◆ ~BerkeleyDatabase()

wallet::BerkeleyDatabase::~BerkeleyDatabase ( )
override

Definition at line 295 of file bdb.cpp.

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Member Function Documentation

◆ AddRef()

void wallet::BerkeleyDatabase::AddRef ( )
overridevirtual

Indicate that a new database user has begun using the database.

Implements wallet::WalletDatabase.

Definition at line 805 of file bdb.cpp.

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◆ Backup()

bool wallet::BerkeleyDatabase::Backup ( const std::string &  strDest) const
overridevirtual

Back up the entire database to a file.

Implements wallet::WalletDatabase.

Definition at line 605 of file bdb.cpp.

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◆ Close()

void wallet::BerkeleyDatabase::Close ( )
overridevirtual

Flush to the database file and close the database.

Also close the environment if no other databases are open in it.

Implements wallet::WalletDatabase.

Definition at line 647 of file bdb.cpp.

◆ Filename()

std::string wallet::BerkeleyDatabase::Filename ( )
inlineoverridevirtual

Return path to main database filename.

Implements wallet::WalletDatabase.

Definition at line 145 of file bdb.h.

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◆ Flush()

void wallet::BerkeleyDatabase::Flush ( )
overridevirtual

Make sure all changes are flushed to database file.

Implements wallet::WalletDatabase.

Definition at line 642 of file bdb.cpp.

◆ Format()

std::string wallet::BerkeleyDatabase::Format ( )
inlineoverridevirtual

Implements wallet::WalletDatabase.

Definition at line 147 of file bdb.h.

◆ IncrementUpdateCounter()

void wallet::BerkeleyDatabase::IncrementUpdateCounter ( )
overridevirtual

Implements wallet::WalletDatabase.

Definition at line 384 of file bdb.cpp.

◆ MakeBatch()

std::unique_ptr< DatabaseBatch > wallet::BerkeleyDatabase::MakeBatch ( bool  flush_on_close = true)
overridevirtual

Make a BerkeleyBatch connected to this database.

Implements wallet::WalletDatabase.

Definition at line 822 of file bdb.cpp.

◆ Open()

void wallet::BerkeleyDatabase::Open ( )
overridevirtual

Open the database if it is not already opened.

Implements wallet::WalletDatabase.

Definition at line 324 of file bdb.cpp.

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◆ PeriodicFlush()

bool wallet::BerkeleyDatabase::PeriodicFlush ( )
overridevirtual

Implements wallet::WalletDatabase.

Definition at line 578 of file bdb.cpp.

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◆ ReloadDbEnv()

void wallet::BerkeleyDatabase::ReloadDbEnv ( )
overridevirtual

Implements wallet::WalletDatabase.

Definition at line 652 of file bdb.cpp.

◆ RemoveRef()

void wallet::BerkeleyDatabase::RemoveRef ( )
overridevirtual

Indicate that database user has stopped using the database and that it could be flushed or closed.

Implements wallet::WalletDatabase.

Definition at line 815 of file bdb.cpp.

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◆ Rewrite()

bool wallet::BerkeleyDatabase::Rewrite ( const char *  pszSkip = nullptr)
overridevirtual

Rewrite the entire database on disk, with the exception of key pszSkip if non-zero.

Implements wallet::WalletDatabase.

Definition at line 451 of file bdb.cpp.

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◆ Verify()

bool wallet::BerkeleyDatabase::Verify ( bilingual_str error)

Verifies the environment and database file.

Definition at line 260 of file bdb.cpp.

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Member Data Documentation

◆ env

std::shared_ptr<BerkeleyEnvironment> wallet::BerkeleyDatabase::env

Pointer to shared database environment.

Normally there is only one BerkeleyDatabase object per BerkeleyEnvivonment, but in the special, backwards compatible case where multiple wallet BDB data files are loaded from the same directory, this will point to a shared instance that gets freed when the last data file is closed.

Definition at line 157 of file bdb.h.

◆ m_db

std::unique_ptr<Db> wallet::BerkeleyDatabase::m_db

Database pointer.

This is initialized lazily and reset during flushes, so it can be null.

Definition at line 160 of file bdb.h.

◆ strFile

std::string wallet::BerkeleyDatabase::strFile

Definition at line 162 of file bdb.h.


The documentation for this class was generated from the following files: