// This is the main routine you should call from your Freeze
// callbacks to freeze an object
public void ObjRef(object o)
{
int id;
SerUnit altunit;
if (Config.SerTrace)
{
Console.WriteLine("Saving {0} at {1}...", o, wpointer);
}
if (o == null) // null pointers are special
{
Byte((byte)SerializationCode.Null);
return;
}
if (reg.CheckWriteObject(unit, o, out altunit, out id))
{
if (altunit == unit)
{
Byte((byte)SerializationCode.SelfRef);
}
else
{
int altcode;
if (!unit_to_offset.TryGetValue(altunit, out altcode))
{
Byte((byte)SerializationCode.NewUnitRef);
String(altunit.name);
// save the hash too so stale refs can be caught
foreach (byte b in altunit.hash)
{
Byte(b);
}
unit_to_offset[altunit] = usedunits++;
}
else
{
Byte((byte)SerializationCode.ForeignRef);
Int(altcode);
}
}
Int((int)id);
}
else
{
// must take responsibility for saving the tag
IFreeze f = o as IFreeze;
if (f != null)
{
f.Freeze(this);
}
else
{
FallbackFreeze(o);
}
}
}
public SerUnit SaveUnit(string name, IFreeze root)
{
SerUnit su = new SerUnit();
su.name = name;
su.root = root;
if (units.ContainsKey(name))
{
throw new InvalidOperationException("unit " + name + " exists");
}
bool success = false;
string file = Path.Combine(Backend.obj_dir, Backend.prefix +
name.Replace("::", ".") + ".ser");
FreezeBuffer fb = new FreezeBuffer(this, su);
units[name] = su;
try {
fb.String(signature);
fb.Int(version);
fb.ObjRef(root);
byte[] data = fb.GetData();
su.hash = NewHash().ComputeHash(data);
File.WriteAllBytes(file, data);
success = true;
} finally {
if (!success)
{
UnloadUnit(name);
}
}
return(su);
}
