* Fixed some more bugs in the message passing by area

* Reordered some functions
* Area messages can now be unflattened instead of using the private _Reference and a special port code

Passing by area is now mostly working but it's not yet enabled. I will have to conduct performance tests first to see if and starting at what messagesize the overhead is reasonable.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16500 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/app/MessagePrivate4.h

@@ -20,8 +20,7 @@
 #define MAX_ITEM_PREALLOCATION			B_PAGE_SIZE
 
 
-static const int32 kPortMessageCodeDirect = 'pjpp';
-static const int32 kPortMessageCodeByArea = 'pjp2';
+static const int32 kPortMessageCode = 'pjpp';
 
 
 enum {
@@ -31,7 +30,8 @@ enum {
 	MESSAGE_FLAG_IS_REPLY = 0x0008,
 	MESSAGE_FLAG_WAS_DELIVERED = 0x0010,
 	MESSAGE_FLAG_HAS_SPECIFIERS = 0x0020,
-	MESSAGE_FLAG_WAS_DROPPED = 0x0080
+	MESSAGE_FLAG_WAS_DROPPED = 0x0080,
+	MESSAGE_FLAG_PASS_BY_AREA = 0x0100
 };
 
 
@@ -182,12 +182,6 @@ class BMessage::Private {
 			return fMessage->_FlattenToArea(header);
 		}
 
-		status_t
-		Reference(message_header *header)
-		{
-			return fMessage->_Reference(header);
-		}
-
 		status_t
 		SendMessage(port_id port, int32 token, bigtime_t timeout,
 			bool replyRequired, BMessenger &replyTo) const