public virtual async Task <WorkResult <HashFile> > RunAsync(HashFile workunit, IProgress <IWorkProgress <HashFile> > progress = null, CancellationToken token = default(CancellationToken))
{
Task t = null;
ThreadUnit tu = new ThreadUnit();
try
{
if (workunit.File == null)
{
return(new WorkResult <HashFile>(WorkResultStatus.Error, "File not found"));
}
FileSystemResult <Stream> fs = await workunit.File.OpenReadAsync();
if (fs.Status != Status.Ok)
{
return(new WorkResult <HashFile>(WorkResultStatus.Error, fs.Error));
}
BasicWorkProgress <HashFile> progressdata = new BasicWorkProgress <HashFile>
{
Command = this,
Unit = workunit
};
tu.WorkUnit = workunit;
tu.FileSize = workunit.File.Size;
tu.Buffer = new byte[2][];
tu.Buffer[0] = new byte[BUFFER_SIZE];
tu.Buffer[1] = new byte[BUFFER_SIZE];
tu.BufferNumber = 0;
t = Task.Factory.StartNew(HashWorker, tu, token, TaskCreationOptions.LongRunning, TaskScheduler.Current);
long read = 0;
do
{
try
{
tu.CurrentSize = await fs.Result.ReadAsync(tu.Buffer[tu.BufferNumber], 0, BUFFER_SIZE, token);
read += tu.CurrentSize;
if (token.IsCancellationRequested)
{
token.ThrowIfCancellationRequested();
}
tu.WorkerAutoResetEvent.Set();
if (progress != null)
{
progressdata.Progress = (double)read * 100 / tu.FileSize;
progress.Report(progressdata);
}
if (tu.Abort)
{
return(new WorkResult <HashFile>(WorkResultStatus.Error, tu.Error));
}
tu.MainAutoResetEvent.WaitOne();
tu.BufferNumber ^= 1;
}
catch (OperationCanceledException)
{
tu.CancelWorker();
return(new WorkResult <HashFile>(WorkResultStatus.Canceled, "Operation Canceled"));
}
catch (Exception e)
{
tu.CancelWorker();
return(new WorkResult <HashFile>(WorkResultStatus.Error, e.Message));
}
} while (tu.CurrentSize != 0);
if (tu.Abort)
{
return(new WorkResult <HashFile>(WorkResultStatus.Error, tu.Error));
}
tu.MainAutoResetEvent.WaitOne();
return(new WorkResult <HashFile>(tu.WorkUnit));
}
catch (Exception e)
{
if (t != null)
{
tu.CancelWorker();
}
return(new WorkResult <HashFile>(WorkResultStatus.Error, e.Message));
}
}
