prevent multiplexing Windows kernel event objects we listen for across various socket...

diff --git a/src/backend/port/win32/socket.c b/src/backend/port/win32/socket.c
index e2ea407336ecc2b7f084c7fc009304678747d010..1b69e32d8e2d8c819d3dd87a458b54678ca519ed 100644 (file)
--- a/src/backend/port/win32/socket.c
+++ b/src/backend/port/win32/socket.c
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/port/win32/socket.c,v 1.11 2006/03/05 15:58:35 momjian Exp $
+ *   $PostgreSQL: pgsql/src/backend/port/win32/socket.c,v 1.12 2006/07/29 19:55:18 adunstan Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -106,6 +106,7 @@ int
 pgwin32_waitforsinglesocket(SOCKET s, int what)
 {
    static HANDLE waitevent = INVALID_HANDLE_VALUE;
+   static SOCKET current_socket = -1;
    HANDLE      events[2];
    int         r;
 
@@ -121,6 +122,15 @@ pgwin32_waitforsinglesocket(SOCKET s, int what)
        ereport(ERROR,
                (errmsg_internal("Failed to reset socket waiting event: %i", (int) GetLastError())));
 
+   /*
+    * make sure we don't multiplex this kernel event object with a different 
+    * socket from a previous call
+    */
+
+   if (current_socket != s && current_socket != -1)
+       WSAEventSelect(current_socket, waitevent, 0);
+
+   current_socket = s;
 
    if (WSAEventSelect(s, waitevent, what) == SOCKET_ERROR)
    {