From 321ddf2422d3fafe29c68c2945bcc9063a238d83 Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Sat, 3 Apr 2004 19:07:59 +0000
Subject: 	* fhandler.h (class fhandler_socket): Remove has_been_closed
 member. 	* fhandler_socket.cc (fhandler_socket::recvfrom): Revert to 
 overlapped I/O. 	(fhandler_socket::recvmsg): Ditto. 
 (fhandler_socket::sendto): Ditto. 	(fhandler_socket::sendmsg): Ditto. 
 * net.cc (wsock_event::prepare): Ditto. 	(wsock_event::wait): Ditto. 
 Evaluate overlapped result also after 	calling CancelIo (thanks to Patrick
 Samson <p_samson@yahoo.com>). 	(wsock_event::release): Remove. 	*
 wsock_event.h: Revert to overlapped I/O.

---
 winsup/cygwin/net.cc | 92 +++++++++++++++++++---------------------------------
 1 file changed, 34 insertions(+), 58 deletions(-)

(limited to 'winsup/cygwin/net.cc')

diff --git a/winsup/cygwin/net.cc b/winsup/cygwin/net.cc
index 32b9f1f3e..c0c5b84c6 100644
--- a/winsup/cygwin/net.cc
+++ b/winsup/cygwin/net.cc
@@ -50,83 +50,59 @@ extern "C"
   int sscanf (const char *, const char *, ...);
 }				/* End of "C" section */
 
-bool
-wsock_event::prepare (int sock, long event_mask)
+LPWSAOVERLAPPED
+wsock_event::prepare ()
 {
-  WSASetLastError (0);
-  if ((event = WSACreateEvent ()) == WSA_INVALID_EVENT)
-    debug_printf ("WSACreateEvent: %E");
-  else if (WSAEventSelect (sock, event, event_mask) == SOCKET_ERROR)
+  LPWSAOVERLAPPED ret = NULL;
+
+  SetLastError (0);
+  if ((event = WSACreateEvent ()) != WSA_INVALID_EVENT)
     {
-      debug_printf ("WSAEventSelect: %E");
-      WSACloseEvent (event);
-      event = WSA_INVALID_EVENT;
+      memset (&ovr, 0, sizeof ovr);
+      ovr.hEvent = event;
+      ret = &ovr;
     }
-  return event != WSA_INVALID_EVENT;
+  else if (GetLastError () == ERROR_PROC_NOT_FOUND) /* winsock2 not available */
+    WSASetLastError (0);
+
+  debug_printf ("%d = wsock_event::prepare ()", ret);
+  return ret;
 }
 
 int
-wsock_event::wait (int sock, int &closed)
+wsock_event::wait (int socket, LPDWORD flags)
 {
   int ret = SOCKET_ERROR;
-  int wsa_err = 0;
   WSAEVENT ev[2] = { event, signal_arrived };
+  DWORD len;
+
   switch (WSAWaitForMultipleEvents (2, ev, FALSE, WSA_INFINITE, FALSE))
     {
       case WSA_WAIT_EVENT_0:
-        WSANETWORKEVENTS evts;
-	if (!WSAEnumNetworkEvents (sock, event, &evts))
+	if (WSAGetOverlappedResult (socket, &ovr, &len, FALSE, flags))
+	  ret = (int) len;
+	break;
+      case WSA_WAIT_EVENT_0 + 1:
+	if (!CancelIo ((HANDLE) socket))
 	  {
-	    if (evts.lNetworkEvents & FD_READ)
-	      {
-		if (evts.iErrorCode[FD_READ_BIT])
-		  wsa_err = evts.iErrorCode[FD_READ_BIT];
-		else
-		  ret = 0;
-	      }
-	    else if (evts.lNetworkEvents & FD_WRITE)
-	      {
-		if (evts.iErrorCode[FD_WRITE_BIT])
-		  wsa_err = evts.iErrorCode[FD_WRITE_BIT];
-		else
-		  ret = 0;
-	      }
-	    if (evts.lNetworkEvents & FD_CLOSE)
-	      {
-		closed = 1;
-		if (!wsa_err)
-		  {
-		    if (evts.iErrorCode[FD_CLOSE_BIT])
-		      wsa_err = evts.iErrorCode[FD_CLOSE_BIT];
-		    else
-		      ret = 0;
-		  }
-	      }
-	    if (wsa_err)
-	      WSASetLastError (wsa_err);
+	    debug_printf ("CancelIo() %E, fallback to blocking io");
+	    WSAGetOverlappedResult (socket, &ovr, &len, TRUE, flags);
 	  }
+	else if (WSAGetOverlappedResult (socket, &ovr, &len, FALSE, flags)
+	         && len > 0)
+	  ret = (int) len;
+	else
+	  WSASetLastError (WSAEINTR);
 	break;
-      case WSA_WAIT_EVENT_0 + 1:
-        WSASetLastError (WSAEINTR);
+      case WSA_WAIT_FAILED:
 	break;
-      default:
+      default:			/* Should be impossible. *LOL* */
 	WSASetLastError (WSAEFAULT);
+	break;
     }
-  return ret;
-}
-
-void
-wsock_event::release (int sock)
-{
-  int last_err = WSAGetLastError ();
-  /* KB 168349: NT4 fails if the event parameter is not NULL. */
-  WSAEventSelect (sock, NULL, 0);
   WSACloseEvent (event);
-  unsigned long non_block = 0;
-  if (ioctlsocket (sock, FIONBIO, &non_block))
-    debug_printf ("return to blocking failed: %d", WSAGetLastError ());
-  else
-    WSASetLastError (last_err);
+  event = NULL;
+  return ret;
 }
 
 WSADATA wsadata;
-- 
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