Class template database_registry

STLdb

Class template database_registry

stldb::database_registry

Synopsis

// In header: </Users/bobw/workspace/stldb_lib/stldb/database_registry.h>

template<typename void_alloc_t> 
class database_registry {
public:
  // construct/copy/destruct
  database_registry(const char *, const char *, const void_alloc_t &);
  database_registry();
  database_registry(const database_registry &);
  database_registry& operator=(const database_registry &);
  ~database_registry();

  // public member functions
  bool check_need_for_recovery() ;
  void await_complete_disconnect(boost::interprocess::scoped_lock< stldb::file_lock > &) ;
  stldb::file_lock * register_pid() ;
  void unregister_pid(stldb::file_lock *) ;
  int connected_pids() ;
  void construction_complete() ;
  void set_invalid(bool) ;
  bool is_valid() ;
  int attached_pids() ;

  // public static functions
  static std::string filelock_name(const char *, const char *) ;
};

Description

Object in shared memory region. This object is used to help track the validity of the database.

`database_registry` public construct/copy/destruct

database_registry(const char * database_dir, const char * db_name, 
                  const void_alloc_t & alloc);

Construct a database registry for db_name within the region that alloc.

```
database_registry();
```

database_registry(const database_registry &);

database_registry& operator=(const database_registry &);

```
~database_registry();
```

`database_registry` public member functions

```
bool check_need_for_recovery() ;
```

void await_complete_disconnect(boost::interprocess::scoped_lock< stldb::file_lock > & held_lock) ;

```
stldb::file_lock * register_pid() ;
```

void unregister_pid(stldb::file_lock * lock) ;

```
int connected_pids() ;
```
```
void construction_complete() ;
```
```
void set_invalid(bool value) ;
```
```
bool is_valid() ;
```
```
int attached_pids() ;
```

`database_registry` public static functions

static std::string 
filelock_name(const char * database_dir, const char * db_name) ;