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+To: vim-dev@vim.org
+Subject: Patch 7.2.013
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=ISO-8859-1
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.2.013
+Problem: While waiting for the X selection Vim consumes a lot of CPU time
+ and hangs until a response is received.
+Solution: Sleep a bit when the selection event hasn't been received yet.
+ Time out after a couple of seconds to avoid a hang when the
+ selection owner isn't responding.
+Files: src/ui.c
+
+
+*** ../vim-7.2.012/src/ui.c Mon Jul 14 21:47:49 2008
+--- src/ui.c Sun Sep 7 16:54:35 2008
+***************
+*** 2110,2115 ****
+--- 2110,2117 ----
+ int i;
+ int nbytes = 0;
+ char_u *buffer;
++ time_t start_time;
++ int timed_out = FALSE;
+
+ for (i =
+ #ifdef FEAT_MBYTE
+***************
+*** 2129,2134 ****
+--- 2131,2137 ----
+ case 3: type = text_atom; break;
+ default: type = XA_STRING;
+ }
++ success = FALSE;
+ XtGetSelectionValue(myShell, cbd->sel_atom, type,
+ clip_x11_request_selection_cb, (XtPointer)&success, CurrentTime);
+
+***************
+*** 2141,2167 ****
+ * characters, then they will appear before the one that requested the
+ * paste! Don't worry, we will catch up with any other events later.
+ */
+ for (;;)
+ {
+ if (XCheckTypedEvent(dpy, SelectionNotify, &event))
+ break;
+ if (XCheckTypedEvent(dpy, SelectionRequest, &event))
+ /* We may get a SelectionRequest here and if we don't handle
+ * it we hang. KDE klipper does this, for example. */
+ XtDispatchEvent(&event);
+
+ /* Do we need this? Probably not. */
+ XSync(dpy, False);
+
+! /* Bernhard Walle solved a slow paste response in an X terminal by
+! * adding: usleep(10000); here. */
+ }
+
+- /* this is where clip_x11_request_selection_cb() is actually called */
+- XtDispatchEvent(&event);
+-
+ if (success)
+ return;
+ }
+
+ /* Final fallback position - use the X CUT_BUFFER0 store */
+--- 2144,2189 ----
+ * characters, then they will appear before the one that requested the
+ * paste! Don't worry, we will catch up with any other events later.
+ */
++ start_time = time(NULL);
+ for (;;)
+ {
+ if (XCheckTypedEvent(dpy, SelectionNotify, &event))
++ {
++ /* this is where clip_x11_request_selection_cb() is actually
++ * called */
++ XtDispatchEvent(&event);
+ break;
++ }
+ if (XCheckTypedEvent(dpy, SelectionRequest, &event))
+ /* We may get a SelectionRequest here and if we don't handle
+ * it we hang. KDE klipper does this, for example. */
+ XtDispatchEvent(&event);
+
++ /* Time out after 2 to 3 seconds to avoid that we hang when the
++ * other process doesn't respond. Note that the SelectionNotify
++ * event may still come later when the selection owner comes back
++ * to life and the text gets inserted unexpectedly (by xterm).
++ * Don't know how to avoid that :-(. */
++ if (time(NULL) > start_time + 2)
++ {
++ timed_out = TRUE;
++ break;
++ }
++
+ /* Do we need this? Probably not. */
+ XSync(dpy, False);
+
+! /* Wait for 1 msec to avoid that we eat up all CPU time. */
+! ui_delay(1L, TRUE);
+ }
+
+ if (success)
+ return;
++
++ /* don't do a retry with another type after timing out, otherwise we
++ * hang for 15 seconds. */
++ if (timed_out)
++ break;
+ }
+
+ /* Final fallback position - use the X CUT_BUFFER0 store */
+*** ../vim-7.2.012/src/version.c Sun Sep 7 15:49:45 2008
+--- src/version.c Sun Sep 7 21:45:55 2008
+***************
+*** 678,679 ****
+--- 678,681 ----
+ { /* Add new patch number below this line */
++ /**/
++ 13,
+ /**/
+
+--
+The users that I support would double-click on a landmine to find out
+what happens. -- A system administrator
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ download, build and distribute -- http://www.A-A-P.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///