public bool Equals(LockData d)
{
if ((object)d == null)
{
return false;
}
return (login.Equals(d.login)) && (mode.Equals(d.mode));
}
private bool ReleaseLocks(String login, LockMode mode, LockItem item)
{
bool allLocksReleased = true;
foreach(int id in item.IDsToLock)
{
List<LockData> currentLocks = locks.GetLocksForItem(id, item.ItemType);
LockData release = new LockData(login, mode);
if(currentLocks.Contains(release))
{
currentLocks.Remove(release);
locks.UpdateLocksForItem(id, item.ItemType, currentLocks);
}
else
{
//this should never be the case!
allLocksReleased = false;
}
}
return allLocksReleased;
}
private bool SetLocks(String login, LockBatch batch, LockMode mode, LockItem item)
{
foreach (int id in item.IDsToLock)
{
List<LockData> currentLocks = locks.GetLocksForItem(id, item.ItemType);
LockData newLock = new LockData(login, mode);
// for future write-lock development
// we have to pass currentLocks as a whole to assure that ll
// for this user are present in currentLocks
// write locks can only be set if the ll for this user are set
foreach(LockData lockData in currentLocks)
{
if(newLock.Equals(lockData) == false
&& !LockMatrix.IsModeCompatible(lockData.mode, mode))
{
Console.WriteLine("Lock conflict, rollback locks for user: {0}", login);
Unlock(login, batch, mode);
return false;
}
}
if(currentLocks.Contains(newLock) == false)
{
currentLocks.Add(newLock);
locks.UpdateLocksForItem(id, item.ItemType, currentLocks);
}
}
return true;
}
