(writechan): Pointless tweak: when the buffer is empty, reset the start

[fwd] / chan.c

diff --git a/chan.c b/chan.c
index ad44891deb6b9a86a955461318c8cf767f9da67a..ffec633e0d36de8d93e740672f767f99be023dca 100644 (file)
--- a/chan.c
+++ b/chan.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
 /* -*-c-*-
  *

- * $Id: chan.c,v 1.4 1999/08/31 17:42:49 mdw Exp $
+ * $Id: chan.c,v 1.5 2000/07/19 17:55:43 mdw Exp $

  *
  * Channel management
  *
  *
  * Channel management
  *


@@ -29,6 +29,11 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: chan.c,v $
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: chan.c,v $

+ * Revision 1.5  2000/07/19 17:55:43  mdw
+ * (writechan): Pointless tweak: when the buffer is empty, reset the start
+ * pointer to the beginning.  This saves doing slightly trickier
+ * @writev(2)@ calls when loading is light.
+ *

  * Revision 1.4  1999/08/31 17:42:49  mdw
  * Use `sel_force' to avoid a `select' call between reads and writes.
  *
  * Revision 1.4  1999/08/31 17:42:49  mdw
  * Use `sel_force' to avoid a `select' call between reads and writes.
  *


@@ -119,8 +124,11 @@ static void writechan(int fd, unsigned mode, void *vp)
 
   /* --- Close the output end if necessary --- */
 
 
   /* --- Close the output end if necessary --- */
 

-  if (c->len == 0 && (c->f & CHANF_CLOSE))
-    c->func(c->p);
+  if (c->len == 0) {
+    c->base = 0;
+    if (c->f & CHANF_CLOSE)
+      c->func(c->p);
+  }

   return;
 
   /* --- Force a close if an error occurred --- */
   return;
 
   /* --- Force a close if an error occurred --- */