protected FileInfoLock LockFile(DriveService.Stream stream, string fileId, string filePath)
{
try
{
Mutex.Wait();
try
{
var fileInfoLock = new FileInfoLock(this, fileId, filePath);
Items.Add(new Item(fileInfoLock, stream));
if (OnLockFile != null)
{
OnLockFile(this, fileInfoLock);
}
return(fileInfoLock);
}
finally
{
Mutex.Release();
}
}
catch (Exception exception)
{
Log.Error(exception, true, false);
return(null);
}
}
public void UnlockFile(FileInfoLock fileInfoLock)
{
try
{
Mutex.Wait();
try
{
if (fileInfoLock.FileStream != null)
{
fileInfoLock.FileStream.Dispose();
fileInfoLock.FileStream = null;
}
int index = 0;
bool found = false;
foreach (Item item in Items)
{
if (item.FileInfoLock == fileInfoLock)
{
found = true;
Items.RemoveAt(index);
break;
}
index++;
}
if (!found)
{
return;
}
if (OnUnlockFile != null)
{
OnUnlockFile(this, fileInfoLock);
}
}
finally
{
Mutex.Release();
}
}
catch (Exception exception)
{
Log.Error(exception);
}
}
public Item(FileInfoLock fileInfoLock, DriveService.Stream stream)
{
FileInfoLock = fileInfoLock;
Stream = stream;
}
protected FileInfoLock LockFile(DriveService.Stream stream,
string fileId,
string filePath,
System.IO.FileMode fileMode,
System.IO.FileAccess fileAccess,
System.IO.FileShare fileShare)
{
try
{
Mutex.Wait();
try
{
System.IO.FileStream fileStream = null;
Exception lastException = null;
for (int i = 0; i < 10; i++)
{
try
{
// Open file will try and execute for 1 sec,
// for this function we will wait up to 10 sec
fileStream = OpenFile(filePath, fileMode, fileAccess, fileShare);
lastException = null;
break;
}
catch (Exception exception)
{
lastException = exception;
}
System.Threading.Thread.Sleep(100);
}
if (lastException != null)
{
throw lastException;
}
FileInfoLock fileInfoLock = null;
try
{
fileInfoLock = LockFile(stream, fileId, filePath);
fileInfoLock.FileStream = fileStream;
}
catch (Exception exception)
{
if (fileStream != null)
{
fileStream.Dispose();
fileStream = null;
}
throw exception;
}
return(fileInfoLock);
}
finally
{
Mutex.Release();
}
}
catch (Exception exception)
{
Log.Error(exception, true, false);
return(null);
}
}
public Item(FileInfoLock fileInfoLock, DriveService.Stream stream)
{
FileInfoLock = fileInfoLock;
Stream = stream;
}
