r21064: The core of this patch is

 void message_register(int msg_type,
                      void (*fn)(int msg_type, struct process_id pid,
-                                void *buf, size_t len))
+                                void *buf, size_t len,
+                                void *private_data),
+                     void *private_data)
 {
        struct dispatch_fns *dfn;

So this adds a (so far unused) private pointer that is passed from
message_register to the message handler. A prerequisite to implement a tiny
samba4-API compatible wrapper around our messaging system. That itself is
necessary for the Samba4 notify system.

Yes, I know, I could import the whole Samba4 messaging system, but I want to
do it step by step and I think getting notify in is more important in this
step.

Volker
(This used to be commit c8ae60ed65dcce9660ee39c75488f2838cf9a28b)

2 files changed, 7 insertions, 4 deletions

diff --git a/source3/printing/nt_printing.c b/source3/printing/nt_printing.c
index aa9075c7db..e415cd41b2 100644
--- a/source3/printing/nt_printing.c
+++ b/source3/printing/nt_printing.c
@@ -629,14 +629,15 @@ BOOL nt_printing_init(void)
 	 * drivers are installed
 	 */
 
-	message_register( MSG_PRINTER_DRVUPGRADE, do_drv_upgrade_printer );
+	message_register(MSG_PRINTER_DRVUPGRADE, do_drv_upgrade_printer, NULL);
 
 	/*
 	 * register callback to handle updating printer data
 	 * when a driver is initialized
 	 */
 
-	message_register( MSG_PRINTERDATA_INIT_RESET, reset_all_printerdata );
+	message_register(MSG_PRINTERDATA_INIT_RESET, reset_all_printerdata,
+			 NULL);
 
 	/* of course, none of the message callbacks matter if you don't
 	   tell messages.c that you interested in receiving PRINT_GENERAL 
diff --git a/source3/printing/printing.c b/source3/printing/printing.c
index 2f1d123a20..588641358f 100644
--- a/source3/printing/printing.c
+++ b/source3/printing/printing.c
@@ -1352,7 +1352,8 @@ static void print_queue_update_with_lock( const char *sharename,
 this is the receive function of the background lpq updater
 ****************************************************************************/
 static void print_queue_receive(int msg_type, struct process_id src,
-				void *buf, size_t msglen)
+				void *buf, size_t msglen,
+				void *private_data)
 {
 	fstring sharename;
 	pstring lpqcommand, lprmcommand;
@@ -1403,7 +1404,8 @@ void start_background_queue(void)
 			exit(1);
 		}
 
-		message_register(MSG_PRINTER_UPDATE, print_queue_receive);
+		message_register(MSG_PRINTER_UPDATE, print_queue_receive,
+				 NULL);
 		
 		DEBUG(5,("start_background_queue: background LPQ thread waiting for messages\n"));
 		while (1) {