From 3eb9f39e442691de1337ac2978ae18b73dff1d4c Mon Sep 17 00:00:00 2001
From: mdw <mdw>
Date: Tue, 31 Aug 1999 17:42:49 +0000
Subject: [PATCH] Use `sel_force' to avoid a `select' call between reads and
 writes.

---
 chan.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/chan.c b/chan.c
index 72938da..ad44891 100644
--- a/chan.c
+++ b/chan.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: chan.c,v 1.3 1999/07/27 18:30:53 mdw Exp $
+ * $Id: chan.c,v 1.4 1999/08/31 17:42:49 mdw Exp $
  *
  * Channel management
  *
@@ -29,6 +29,9 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: chan.c,v $
+ * Revision 1.4  1999/08/31 17:42:49  mdw
+ * Use `sel_force' to avoid a `select' call between reads and writes.
+ *
  * Revision 1.3  1999/07/27 18:30:53  mdw
  * Various minor portability fixes.
  *
@@ -167,8 +170,10 @@ static void readchan(int fd, unsigned mode, void *vp)
   }
   else if (r == 0)
     goto close;
-  else if (c->len == 0 && (c->f & CHANF_READY))
+  else if (c->len == 0 && (c->f & CHANF_READY)) {
     sel_addfile(&c->w);
+    sel_force(&c->w);
+  }
   c->len += r;
   if (c->len == CHAN_BUFSZ)
     sel_rmfile(&c->r);
@@ -178,8 +183,10 @@ static void readchan(int fd, unsigned mode, void *vp)
 
 close:
   c->f |= CHANF_CLOSE;
-  if (!c->len && (c->f & CHANF_READY))
+  if (!c->len && (c->f & CHANF_READY)) {
     sel_addfile(&c->w);
+    sel_force(&c->w);
+  }
   sel_rmfile(&c->r);
 }
 
@@ -216,8 +223,10 @@ void chan_dest(chan *c, int fd)
   if (c->f & CHANF_READY)
     return;
   sel_initfile(sel, &c->w, fd, SEL_WRITE, writechan, c);
-  if (c->len || (c->f & CHANF_CLOSE))
+  if (c->len || (c->f & CHANF_CLOSE)) {
     sel_addfile(&c->w);
+    sel_force(&c->w);
+  }
   c->f |= CHANF_READY;
 }
 
-- 
2.11.0