When the owner of a message queue detaches from a queue, set MSG_QUEUE_ORPHAN

flag in msg_queue_t.flags

src/xpdev/msg_queue.c

@@ -102,6 +102,9 @@ long DLLCALL msgQueueDetach(msg_queue_t* q)
 	if(q==NULL || q->refs<1)
 		return(-1);
 
+	if(msgQueueOwner(q))
+		q->flags |= MSG_QUEUE_ORPHAN;
+
 	if((refs=--q->refs)==0)
 		msgQueueFree(q);
 

src/xpdev/msg_queue.h

@@ -58,6 +58,7 @@ typedef struct {
 
 #define MSG_QUEUE_MALLOC		(1<<0)	/* Queue allocated with malloc() */
 #define MSG_QUEUE_BIDIR			(1<<1)	/* Bi-directional message queue */
+#define MSG_QUEUE_ORPHAN		(1<<2)	/* Owner has detached */
 
 DLLEXPORT msg_queue_t*	DLLCALL msgQueueInit(msg_queue_t*, long flags);
 DLLEXPORT BOOL			DLLCALL msgQueueFree(msg_queue_t*);