From d3cd7eb03da9459b7c5528cc9f1b70fc80481ec7 Mon Sep 17 00:00:00 2001
From: Miles Bader <miles@gnu.org>
Date: Mon, 31 Jul 1995 20:02:53 +0000
Subject: (connq_compress): New function. (connq_interrupt_sock): Use
 connq_compress to compress the queue.

---
 pflocal/connq.c | 40 ++++++++++++++++++++++++----------------
 1 file changed, 24 insertions(+), 16 deletions(-)

(limited to 'pflocal')

diff --git a/pflocal/connq.c b/pflocal/connq.c
index 8f06ba29..fc7d2700 100644
--- a/pflocal/connq.c
+++ b/pflocal/connq.c
@@ -250,6 +250,28 @@ debug (&req, "(req) unlock");
   return err;
 }
 
+/* `Compresses' CQ, by removing any NULL entries.  CQ should be locked.  */
+static void
+connq_compress (struct connq *cq)
+{
+  unsigned pos;
+  unsigned comp_tail = cq->head;
+
+debug (cq, "compress queue");
+  /* Now compress the queue to remove any null entries we put in.  */
+  for (pos = cq->head; pos != cq->tail; pos = qnext (cq, pos))
+    if (cq->queue[pos] != NULL)
+      /* This position has a non-NULL request, so move it to the end of the
+	 compressed queue.  */
+      {
+	cq->queue[comp_tail] = cq->queue[pos];
+	comp_tail = qnext (cq, comp_tail);
+      }
+
+  /* Move back tail to only include what we kept in the queue.  */
+  cq->tail = comp_tail;
+}
+
 /* Interrupt any threads waiting on CQ, both listeners and connectors, and
    make them return with EINTR.  */
 void
@@ -286,7 +308,7 @@ debug (cq, "out");
 void
 connq_interrupt_sock (struct connq *cq, struct sock *sock)
 {
-  unsigned pos, comp_tail;
+  unsigned pos;
 
 debug (cq, "in");
 debug (cq, "lock");
@@ -303,21 +325,7 @@ debug (cq, "interrupt connections from: %p", sock);
       cq->queue[pos] = NULL;	/* Mark REQ as being deleted.  */
     }
 
-debug (cq, "compress queue");
-  /* Now compress the queue to remove any null entries we put in.  */
-  for (pos = cq->head, comp_tail = cq->head;
-       pos != cq->tail;
-       pos = qnext (cq, pos))
-    if (cq->queue[pos] != NULL)
-      /* This position has a non-NULL request, so move it to the end of the
-	 compressed queue.  */
-      {
-	cq->queue[comp_tail] = cq->queue[pos];
-	comp_tail = qnext (cq, comp_tail);
-      }
-
-  /* Move back tail to only include what we kept in the queue.  */
-  cq->tail = comp_tail;
+  connq_compress (cq);
 
 debug (cq, "unlock");
   mutex_unlock (&cq->lock);
-- 
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