private AsynTokens GetAsyncTokens(string path)
{
AsynTokens asynTokens;
lock (_locker)
{
if (!_dictionary.TryGetValue(path, out asynTokens))
{
asynTokens = new AsynTokens();
_dictionary.Add(path, asynTokens);
}
}
asynTokens.SemaphoreSlim.Wait();
return(asynTokens);
}
private Task<IRandomAccessStream> OpenStreamAsync(TorrentFile file, FileAccessMode access, AsynTokens asynTokens)
{
return Task.Run(async () =>
{
var token = asynTokens.CancellationTokenSource.Token;
var fullPath = file.FullPath;
var storageFile = await StorageHelper.CreateFileAsync(fullPath, file.TargetFolder);
if (access == FileAccessMode.ReadWrite)
{
var stream = File.Open(storageFile.Path, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
var randomAccessStream = stream.AsRandomAccessStream();
try
{
var size = (long) randomAccessStream.Size;
var length = file.Length - size;
if (length > 0L)
{
var buffer = ClientEngine.BufferManager.GetBuffer((int) Math.Min(length, 524288L));
try
{
randomAccessStream.Seek((ulong) size);
for (var i = size;
i < file.Length;
i = i + (long) buffer.Length)
{
length = length - await randomAccessStream.WriteAsync(
buffer.AsBuffer(0,
(int) Math.Min(length, buffer.Length)));
token.ThrowIfCancellationRequested();
}
}
finally
{
ClientEngine.BufferManager.FreeBuffer(ref buffer);
}
}
}
finally
{
randomAccessStream?.Dispose();
}
}
return await storageFile.OpenAsync(access);
});
}
private AsynTokens GetAsyncTokens(string path)
{
AsynTokens asynTokens;
lock (_locker)
{
if (!_dictionary.TryGetValue(path, out asynTokens))
{
asynTokens = new AsynTokens();
_dictionary.Add(path, asynTokens);
}
}
asynTokens.SemaphoreSlim.Wait();
return asynTokens;
}
private Task <IRandomAccessStream> OpenStreamAsync(TorrentFile file, FileAccessMode access, AsynTokens asynTokens)
{
return(Task.Run(async() =>
{
var token = asynTokens.CancellationTokenSource.Token;
var fullPath = file.FullPath;
var storageFile = await StorageHelper.CreateFileAsync(fullPath, file.TargetFolder);
if (access == FileAccessMode.ReadWrite)
{
var stream = File.Open(storageFile.Path, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
var randomAccessStream = stream.AsRandomAccessStream();
try
{
var size = (long)randomAccessStream.Size;
var length = file.Length - size;
if (length > 0L)
{
var buffer = ClientEngine.BufferManager.GetBuffer((int)Math.Min(length, 524288L));
try
{
randomAccessStream.Seek((ulong)size);
for (var i = size;
i < file.Length;
i = i + (long)buffer.Length)
{
length = length - await randomAccessStream.WriteAsync(
buffer.AsBuffer(0,
(int)Math.Min(length, buffer.Length)));
token.ThrowIfCancellationRequested();
}
}
finally
{
ClientEngine.BufferManager.FreeBuffer(ref buffer);
}
}
}
finally
{
randomAccessStream?.Dispose();
}
}
return await storageFile.OpenAsync(access);
}));
}