locklib

Interface LockPreChecker<LockType>

Type Parameters:

LockType - the type of lock

All Superinterfaces:

LockManagerListener<LockType>

All Known Implementing Classes:

NullLockPreChecker

public interface LockPreChecker<LockType>
extends LockManagerListener<LockType>

A lock pre-checker is informed of all locks currently held and decides whether a lock (which cannot be obtained right now) can be queued for later acquisition. The most common use of a pre-checker is to detect deadlocks.

Method Summary

Modifier and Type	Method and Description
void	pre_check_wait(LockRequest<LockType> r, Target<LockType> t) Checks if we can wait for a lock.

Methods inherited from interface locklib.LockManagerListener

locked, unlocked

Method Detail

pre_check_wait

void pre_check_wait(LockRequest<LockType> r,
                    Target<LockType> t)

Checks if we can wait for a lock. This method should throw an exception if waiting for the lock is not allowed.

Parameters:

r - the lock request

t - the lock target