From 6d8476ab3b367e42fa2e6ea809aa27fa265ad9db Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Fri, 4 Nov 2005 18:35:51 +0000
Subject: [PATCH] Ensure that we only create one ConsoleCtrlHandler per psql
 process, so as to avoid performance issues and possible ultimate crash on
 long psql scripts.  Per Merlin Moncure.

---
 src/bin/psql/common.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/bin/psql/common.c b/src/bin/psql/common.c
index 1c26eb6b84..c98322ca4c 100644
--- a/src/bin/psql/common.c
+++ b/src/bin/psql/common.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2000-2005, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/bin/psql/common.c,v 1.95 2005/01/01 05:43:08 momjian Exp $
+ * $PostgreSQL: pgsql/src/bin/psql/common.c,v 1.95.4.1 2005/11/04 18:35:51 tgl Exp $
  */
 #include "postgres_fe.h"
 #include "common.h"
@@ -315,7 +315,14 @@ setup_win32_locks(void)
 void
 setup_cancel_handler(void)
 {
-	SetConsoleCtrlHandler(consoleHandler, TRUE);
+	static bool done = false;
+
+	/* only need one handler per process */
+	if (!done)
+	{
+		SetConsoleCtrlHandler(consoleHandler, TRUE);
+		done = true;
+	}
 }
 
 #endif /* WIN32 */