public bool TryGetParentDirectory(BaseEntry entry, out DirectoryEntry directory)
{
lock (_directoriesLockObject)
{
return(_directories.TryGetValue(entry.DirectoryId, out directory));
}
}
public bool CanWrite(BaseEntry entry)
{
lock (_writeLockObject)
{
var entryLocker = EntryLockerAccessorFactory.GetEntryLockerAccessor(Operation.Write)(this);
return(!entryLocker.CheckIsLocked(entry));
}
}
public bool CanRead(BaseEntry entry)
{
lock (_readLockObject)
{
var entryLocker = EntryLockerAccessorFactory.GetEntryLockerAccessor(Operation.Read)(this);
return(!entryLocker.CheckIsLocked(entry));
}
}
public void Unlock(BaseEntry entry)
{
lock (_lockObject)
{
if (CheckIsLocked(entry))
{
_dictionary[entry]--;
}
}
}
public void Lock(BaseEntry entry)
{
lock (_lockObject)
{
if (!_dictionary.ContainsKey(entry))
{
_dictionary.Add(entry, 0);
}
_dictionary[entry]++;
}
}
public void AddEntry(BaseEntry entry)
{
switch (entry)
{
case FileEntry file:
addFile(file);
break;
case DirectoryEntry directory:
addDirectory(directory);
break;
}
}
public void RemoveEntry(BaseEntry entry)
{
switch (entry)
{
case FileEntry file:
removeFile(file);
break;
case DirectoryEntry directory:
removeDirectory(directory);
break;
}
}
public bool TryLockWriting(BaseEntry entry, out LockerOperation operation)
{
lock (_writeLockObject)
{
operation = null;
if (!CanWrite(entry))
{
return(false);
}
operation = LockWriting(entry);
return(true);
}
}
private IEnumerable <DirectoryEntry> getDirectoryChain(BaseEntry entry)
{
var tmpEntry = entry;
while (tmpEntry.DirectoryId > -1)
{
if (!Indexer.TryGetParentDirectory(tmpEntry, out var retv))
{
continue;
}
tmpEntry = retv;
yield return(retv);
}
}
public bool CheckIsLocked(BaseEntry entry)
{
lock (_lockObject)
return(_dictionary.ContainsKey(entry) && _dictionary[entry] > 0);
}
public LockerOperation LockWriting(BaseEntry entry)
{
return(LockWriting(new[] { entry }));
}
