private void ReleaseLockIfUnused(ISynchronizableLibraryRepository repository, CountableReaderWriterLockSlim repositoryLock)
{
if (repositoryLock.ReadLockCount == 0 && repositoryLock.WriteLockCount == 0)
{
_repositoryLocks.Remove(repository.Id);
repositoryLock.Dispose();
}
}
private void ReleaseLockIfUnused(ISynchronizableLibraryRepository repository, CountableReaderWriterLockSlim repositoryLock)
{
if (repositoryLock.ReadLockCount == 0 && repositoryLock.WriteLockCount == 0)
{
_repositoryLocks.Remove(repository.Id);
repositoryLock.Dispose();
}
}
public void BeginRead(ISynchronizableLibraryRepository repository)
{
CountableReaderWriterLockSlim repositoryLock;
lock (_repositoryLocks)
{
repositoryLock = _repositoryLocks.GetOrAdd(repository.Id, repositoryDescriptor => new CountableReaderWriterLockSlim());
repositoryLock.ReadLockCount++;
}
repositoryLock.EnterReadLock();
}
public void BeginRead(ISynchronizableLibraryRepository repository)
{
CountableReaderWriterLockSlim repositoryLock;
lock (_repositoryLocks)
{
repositoryLock = _repositoryLocks.GetOrAdd(repository.Id, repositoryDescriptor => new CountableReaderWriterLockSlim());
repositoryLock.ReadLockCount++;
}
repositoryLock.EnterReadLock();
}
public void EndWrite(ISynchronizableLibraryRepository repository)
{
lock (_repositoryLocks)
{
if (_repositoryLocks.ContainsKey(repository.Id) && _repositoryLocks[repository.Id].WriteLockCount > 0)
{
var repositoryLock = _repositoryLocks[repository.Id];
repositoryLock.WriteLockCount--;
repositoryLock.ExitWriteLock();
ReleaseLockIfUnused(repository, repositoryLock);
}
}
}
public void EndWrite(ISynchronizableLibraryRepository repository)
{
lock (_repositoryLocks)
{
if (_repositoryLocks.ContainsKey(repository.Id) && _repositoryLocks[repository.Id].WriteLockCount > 0)
{
var repositoryLock = _repositoryLocks[repository.Id];
repositoryLock.WriteLockCount--;
repositoryLock.ExitWriteLock();
ReleaseLockIfUnused(repository, repositoryLock);
}
}
}
public bool TryBeginWrite(ISynchronizableLibraryRepository repository)
{
CountableReaderWriterLockSlim repositoryLock;
lock (_repositoryLocks)
{
if (_repositoryLocks.ContainsKey(repository.Id))
{
repositoryLock = _repositoryLocks[repository.Id];
if (repositoryLock.WriteLockCount > 0)
{
return false;
}
}
else
{
repositoryLock = new CountableReaderWriterLockSlim();
_repositoryLocks.Add(repository.Id, repositoryLock);
}
repositoryLock.WriteLockCount++;
}
repositoryLock.EnterWriteLock();
return true;
}
public bool TryBeginWrite(ISynchronizableLibraryRepository repository)
{
CountableReaderWriterLockSlim repositoryLock;
lock (_repositoryLocks)
{
if (_repositoryLocks.ContainsKey(repository.Id))
{
repositoryLock = _repositoryLocks[repository.Id];
if (repositoryLock.WriteLockCount > 0)
{
return(false);
}
}
else
{
repositoryLock = new CountableReaderWriterLockSlim();
_repositoryLocks.Add(repository.Id, repositoryLock);
}
repositoryLock.WriteLockCount++;
}
repositoryLock.EnterWriteLock();
return(true);
}