[glib] glib/gpoll W32: trust WFMOE() return value

[Руслан Ижбулатов <ruslanizhb src gnome org>]

commit b267f648d936902e5cad679f2da575bad8bcd1ed
Author: Руслан Ижбулатов <lrn1986 gmail com>
Date:   Sat Jul 29 08:12:40 2017 +0000

    glib/gpoll W32: trust WFMOE() return value
    
    WaitForMultipleObjectsEx() returns the index of the *first* handle that triggered the wakeup, and 
promises that all handles with lower index are still inactive. Therefore, don't check them, only check the 
handles with higher index. This removes the need of rearranging the handles (and, now, handle_to_fd) array, 
it's enough to take a pointer to the next item and use it as a new, shorter array.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=785468

 glib/gpoll.c |   19 ++++++++++---------
 1 files changed, 10 insertions(+), 9 deletions(-)
---
diff --git a/glib/gpoll.c b/glib/gpoll.c
index 9ebb104..06ba705 100644
--- a/glib/gpoll.c
+++ b/glib/gpoll.c
@@ -226,15 +226,16 @@ poll_rest (GPollFD *msg_fd,
        */
       if (timeout == 0 && nhandles > 1)
        {
-         /* Remove the handle that fired */
-         int i;
-          for (i = ready - WAIT_OBJECT_0 + 1; i < nhandles; i++)
-            {
-              handles[i-1] = handles[i];
-              handle_to_fd[i-1] = handle_to_fd[i];
-            }
-         nhandles--;
-         recursed_result = poll_rest (NULL, handles, handle_to_fd, nhandles, 0);
+         /* Poll the handles with index > ready */
+          HANDLE  *shorter_handles;
+          GPollFD **shorter_handle_to_fd;
+          gint     shorter_nhandles;
+
+          shorter_handles = &handles[ready - WAIT_OBJECT_0 + 1];
+          shorter_handle_to_fd = &handle_to_fd[ready - WAIT_OBJECT_0 + 1];
+          shorter_nhandles = nhandles - (ready - WAIT_OBJECT_0 + 1);
+
+         recursed_result = poll_rest (NULL, shorter_handles, shorter_handle_to_fd, shorter_nhandles, 0);
          return (recursed_result == -1) ? -1 : 1 + recursed_result;
        }
       return 1;