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c-treeDB API for C

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Record Lock Modes

The table below lists the lock modes that are to be used with the manual record locking function ctdbLockRecord().

These modes (except for the "_BLOCK" modes) are also returned by the ctdbGetRecordLock() function (see the explanations in parentheses).

c-treeDB Record
Lock Modes

c-treeDB .NET
Lock Modes


Explanation

CTLOCK_FREE

FREE_LOCK

Free the data record lock / (the record lock is removed).

CTLOCK_READ

READ_LOCK

Non-blocking read locks / (the record has a read / shared lock).

CTLOCK_READ_BLOCK

READ_BLOCK_LOCK

Blocking read locks.

CTLOCK_WRITE

WRITE_LOCK

Non-blocking write locks / (the record has a write / exclusive lock). If the lock cannot be acquired, an error is returned.

CTLOCK_WRITE_BLOCK

WRITE_BLOCK_LOCK

Blocking write locks. The thread will block until the lock can be acquired.

Note: c-treeDB .NET can find the Lock Modes listed in the LOCK_MODE enum.

See also Locking.

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