UnlockNotifyHandler

UnlockNotifyHandler used when SQLite is compiled with SQLITE_ENABLE_UNLOCK_NOTIFY, and when the library is built with -version=SqliteEnableUnlockNotify. It is implemented using the standard core.sync package.

Use setUnlockNotifyHandler method to handle the database lock.

class UnlockNotifyHandler
version(_UnlockNotify && SqliteEnableUnlockNotify)
final
class UnlockNotifyHandler : IUnlockNotifyHandler {
import core.sync.condition : Condition;;
import core.sync.mutex : Mutex;;
this();
void wait();
void emit(int res);
void reset();
int result [@property getter];
}
class UnlockNotifyHandler

Constructors

this this(): Constructor

Members

Functions

emit void emit(int res): Unlocks the handler, state is one of SQLITE_LOCKED or SQLITE_OK
reset void reset(): Resets the handler for the next use
wait void wait(): Blocks until emit is called

Properties

result int result [@property getter]: Result after wait is finished

Inherited Members

From IUnlockNotifyHandler

wait void wait(): Blocks until emit is called
emit void emit(int state): Unlocks the handler. This is called from registered callback from SQLite.
waitOne void waitOne(): This is used as an alternative when SQLite is not compiled with SQLITE_ENABLE_UNLOCK_NOTIFY, and when the library is built with -version=SqliteFakeUnlockNotify. Using this, the handler tries to wait out the SQLITE_LOCKED state for some time. Implementation have to block for some amount of time and check if total amount is not greater than some constant afterwards. If there is still some time to try again, the handler must set the result to SQLITE_OK or to SQLITE_LOCKED otherwise.
reset void reset(): Resets the handler for the next use
result int result [@property getter]: Result after wait is finished