private void CloseAndRemove(TorrentFileStream s)
{
lock (_locker)
{
Debug.WriteLine("Closing and removing: {0}", s.Path);
if (_streams.Remove(s))
{
s.Dispose();
}
}
}
private void Add(TorrentFileStream stream)
{
lock (_locker)
{
Debug.WriteLine("Opening filestream: {0}", stream.Path);
// If we have our maximum number of streams open, just dispose and dump the least recently used one
if (_maxStreams != 0 && _streams.Count >= _streams.Capacity)
{
Debug.WriteLine("We've reached capacity: {0}", _streams.Count);
var first = _streams.FirstOrDefault(p => p.TorrentFile.Priority != Priority.Immediate);
if (first != null)
CloseAndRemove(first);
}
_streams.Add(stream);
}
}
private void Add(TorrentFileStream stream)
{
lock (_locker)
{
Debug.WriteLine("Opening filestream: {0}", stream.Path);
// If we have our maximum number of streams open, just dispose and dump the least recently used one
if (_maxStreams != 0 && _streams.Count >= _streams.Capacity)
{
Debug.WriteLine("We've reached capacity: {0}", _streams.Count);
var first = _streams.FirstOrDefault(p => p.TorrentFile.Priority != Priority.Immediate);
if (first != null)
{
CloseAndRemove(first);
}
}
_streams.Add(stream);
}
}
internal TorrentFileStream GetStream(TorrentFile file, FileAccessMode access)
{
var fullPath = file.FullPath;
var asyncTokens = GetAsyncTokens(fullPath);
try
{
asyncTokens.CancellationTokenSource.Token.ThrowIfCancellationRequested();
var s = FindStream(fullPath);
if (s != null)
{
// If we are requesting write access and the current stream does not have it
if (access == FileAccessMode.ReadWrite && !s.CanWrite)
{
Debug.WriteLine("Didn't have write permission - reopening");
CloseAndRemove(s);
}
else
{
lock (_locker)
{
// Place the filestream at the end so we know it's been recently used
_streams.Remove(s);
_streams.Add(s);
}
return s;
}
}
try
{
var result = OpenStreamAsync(file, access, asyncTokens).Result;
file.Exists = true;
s = new TorrentFileStream(file, result)
{
Size = (ulong) file.Length
};
Add(s);
}
catch (AggregateException ex)
{
if (ex.InnerException is OperationCanceledException ||
ex.InnerException is UnauthorizedAccessException)
throw ex.InnerException;
throw;
}
return s;
}
finally
{
if (asyncTokens != null)
{
asyncTokens.SemaphoreSlim.Release();
if (asyncTokens.CancellationTokenSource.IsCancellationRequested)
Clear(fullPath);
}
}
}
private void CloseAndRemove(TorrentFileStream s)
{
lock (_locker)
{
Debug.WriteLine("Closing and removing: {0}", s.Path);
if (_streams.Remove(s))
s.Dispose();
}
}
internal TorrentFileStream GetStream(TorrentFile file, FileAccessMode access)
{
var fullPath = file.FullPath;
var asyncTokens = GetAsyncTokens(fullPath);
try
{
asyncTokens.CancellationTokenSource.Token.ThrowIfCancellationRequested();
var s = FindStream(fullPath);
if (s != null)
{
// If we are requesting write access and the current stream does not have it
if (access == FileAccessMode.ReadWrite && !s.CanWrite)
{
Debug.WriteLine("Didn't have write permission - reopening");
CloseAndRemove(s);
}
else
{
lock (_locker)
{
// Place the filestream at the end so we know it's been recently used
_streams.Remove(s);
_streams.Add(s);
}
return(s);
}
}
try
{
var result = OpenStreamAsync(file, access, asyncTokens).Result;
file.Exists = true;
s = new TorrentFileStream(file, result)
{
Size = (ulong)file.Length
};
Add(s);
}
catch (AggregateException ex)
{
if (ex.InnerException is OperationCanceledException ||
ex.InnerException is UnauthorizedAccessException)
{
throw ex.InnerException;
}
throw;
}
return(s);
}
finally
{
if (asyncTokens != null)
{
asyncTokens.SemaphoreSlim.Release();
if (asyncTokens.CancellationTokenSource.IsCancellationRequested)
{
Clear(fullPath);
}
}
}
}
