private static FileStreamBlockCollection CreateCollection(IDatabaseFileProvider databaseFileProvider, bool writable, FileMode mode, FileAccess access, FileShare share)
{
var endTime = DateTime.Now + databaseFileProvider.Timeout;
var @lock = writable ?
Scheduler.EnterWrite(databaseFileProvider.Path, databaseFileProvider.Timeout)
: Scheduler.EnterRead(databaseFileProvider.Path, databaseFileProvider.Timeout);
while (true)
{
try
{
var stream = new FileStream(databaseFileProvider.Path, mode, access, share);
return(new FileStreamBlockCollection(stream, @lock));
}
catch (FileNotFoundException)
{
EnsureFile(databaseFileProvider.Path);
}
catch (IOException e)
{
if (IoError.IsSharingViolation(e))
{
if (endTime > DateTime.Now)
{
databaseFileProvider.HandleSharingViolation();
continue;
}
}
@lock.Dispose();
throw;
}
catch (Exception)
{
@lock.Dispose();
throw;
}
}
}
public Collection(IDatabaseFileProvider fileProvider)
{
FileProvider = fileProvider;
IndexValueFactory = new IndexValueFactory();
}
private static ReaderWriterLock GetLock(IDatabaseFileProvider databaseFileProvider)
{
throw new NotImplementedException();
}
public static FileStreamBlockCollection CreateWrite(IDatabaseFileProvider databaseFileProvider)
{
return(CreateCollection(databaseFileProvider, true, FileMode.Open, FileAccess.ReadWrite, FileShare.None));
}
public static FileStreamBlockCollection CreateRead(IDatabaseFileProvider databaseFileProvider)
{
return(CreateCollection(databaseFileProvider, false, FileMode.Open, FileAccess.Read, FileShare.ReadWrite));
}
