[glib] Revert "GIOScheduler: Avoid constant iteration over pending job list"

[Ryan Lortie <ryanl src gnome org>]

commit 115ca3d8970ca32d824a201a9cc8f1fb24f3155e
Author: Ryan Lortie <desrt desrt ca>
Date:   Mon Jun 25 10:37:51 2012 -0400

    Revert "GIOScheduler: Avoid constant iteration over pending job list"
    
    This reverts commit 2839297686a9305b4fa909b93c337ef1d1a5e94b.
    
    Conflicts:
    
    	gio/gioscheduler.c
    
    https://bugzilla.gnome.org/show_bug.cgi?id=678576

 gio/gioscheduler.c |   41 ++++++++++++++++++++++++++---------------
 1 files changed, 26 insertions(+), 15 deletions(-)
---
diff --git a/gio/gioscheduler.c b/gio/gioscheduler.c
index f3e629c..b94d8dd 100644
--- a/gio/gioscheduler.c
+++ b/gio/gioscheduler.c
@@ -120,17 +120,34 @@ init_scheduler (gpointer arg)
 }
 
 static void
-on_job_canceled (GCancellable    *cancellable,
-		 gpointer         user_data)
+remove_active_job (GIOSchedulerJob *job)
 {
-  GIOSchedulerJob *job = user_data;
-
-  job->io_priority = -1;
-
-  if (job_thread_pool != NULL)
+  GIOSchedulerJob *other_job;
+  GList *l;
+  gboolean resort_jobs;
+  
+  G_LOCK (active_jobs);
+  active_jobs = g_list_delete_link (active_jobs, job->active_link);
+  
+  resort_jobs = FALSE;
+  for (l = active_jobs; l != NULL; l = l->next)
+    {
+      other_job = l->data;
+      if (other_job->io_priority >= 0 &&
+	  g_cancellable_is_cancelled (other_job->cancellable))
+	{
+	  other_job->io_priority = -1;
+	  resort_jobs = TRUE;
+	}
+    }
+  G_UNLOCK (active_jobs);
+  
+  if (resort_jobs &&
+      job_thread_pool != NULL)
     g_thread_pool_set_sort_function (job_thread_pool,
 				     g_io_job_compare,
 				     NULL);
+
 }
 
 static void
@@ -141,9 +158,7 @@ job_destroy (gpointer data)
   if (job->destroy_notify)
     job->destroy_notify (job->data);
 
-  G_LOCK (active_jobs);
-  active_jobs = g_list_delete_link (active_jobs, job->active_link);
-  G_UNLOCK (active_jobs);
+  remove_active_job (job);
   g_io_job_free (job);
 }
 
@@ -206,11 +221,7 @@ g_io_scheduler_push_job (GIOSchedulerJobFunc  job_func,
   job->io_priority = io_priority;
     
   if (cancellable)
-    {
-      job->cancellable = g_object_ref (cancellable);
-      g_cancellable_connect (job->cancellable, (GCallback)on_job_canceled,
-			     job, NULL);
-    }
+    job->cancellable = g_object_ref (cancellable);
 
   job->context = g_main_context_ref_thread_default ();