fixed

1 files changed, 23 insertions, 2 deletions

diff --git a/src/cmd/acme/mail/win.c b/src/cmd/acme/mail/win.c
index e407b0c3..8a3e60a9 100644
--- a/src/cmd/acme/mail/win.c
+++ b/src/cmd/acme/mail/win.c
@@ -24,10 +24,32 @@ newwindow(void)
 	w->body = nil;
 	w->data = nil;
 	w->cevent = chancreate(sizeof(Event*), 0);
+	w->ref = 1;
 	return w;
 }
 
 void
+winincref(Window *w)
+{
+	qlock(&w->lk);
+	++w->ref;
+	qunlock(&w->lk);
+}
+
+void
+windecref(Window *w)
+{
+	qlock(&w->lk);
+	if(--w->ref > 0){
+		qunlock(&w->lk);
+		return;
+	}
+	fsclose(w->event);
+	chanfree(w->cevent);
+	free(w);
+}
+
+void
 winsetdump(Window *w, char *dir, char *cmd)
 {
 	if(dir != nil)
@@ -125,6 +147,7 @@ wingetec(Window *w)
 		w->nbuf = fsread(w->event, w->buf, sizeof w->buf);
 		if(w->nbuf <= 0){
 			/* probably because window has exited, and only called by wineventproc, so just shut down */
+			windecref(w);
 			threadexits(nil);
 		}
 		w->bufp = w->buf;
@@ -255,8 +278,6 @@ windel(Window *w, int sure)
 	windormant(w);
 	fsclose(w->ctl);
 	w->ctl = nil;
-	fsclose(w->event);
-	w->event = nil;
 	return 1;
 }