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CTBase::GetKeepLock
Syntax
CTKEEP_MODE CTBase::GetKeepLock();
Parameters
This method has no parameters.
Description
When a transaction is terminated by calling either the CTBase::Commit() or CTBase::Abort() function, all locks are automatically freed, including the locks acquired outside the transaction. An application might want to control which locks are kept when the transaction ends. To support this ability, c-treeDB introduced a function to control how locks are handled when a transaction terminates.
CTBase::GetKeepLock() returns the current keep lock status.
Return
Value |
Symbolic Constant |
Explanation |
|---|---|---|
0 |
CTKEEP_FREE |
Release all locks. Clear LKISAM state, turning off session-wide record locking. This is the default mode. |
1 |
CTKEEP_LOCK |
Keep all locks acquired before and during transaction, leaving session-wide record locking as it was. The LKISAM state is not cleared. |
2 |
CTKEEP_OUT |
Release only locks obtained within transaction and/or locks on records updated within transaction. The LKISAM state is not cleared, leaving session-wide record locking as it was. |
3 |
CTKEEP_OUTALL |
Unconditionally keep all locks acquired before transaction began. Free locks obtained within the transaction. The LKISAM state is not cleared, leaving session-wide record locking as it was. |
See also
CTBase::Abort(), CTBase::Begin(), CTBase::Commit(), CTBase:::SetKeepLock()
