- Fix deadlock that blocked PythonPolicy::sort_queue

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@796 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/scheduler.cc

@@ -131,14 +131,14 @@ update_requests_for_old_running_thread(DynamicThread& running_thread)
 
 //private constructor. The parameter is discarded
 Scheduler::Scheduler()
-	: _ready_queue(NULL), _policy(NULL)
-{}
+	: _ready_queue(NULL), _policy(NULL), _step_mutex()
+{
+}
 
 
 ReadyQueue*
 Scheduler::get_ready_queue()
 {
-  // FIXME return the correct queue accordingly to the value returned by Policy::wants()
   return _ready_queue;
 }
 
@@ -168,7 +168,7 @@ Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterrup
 	// store a readyqueue and policy pointer for the user-policy to retrieve, to when 
 	// the policy returns
 	// TODO: restrict this area to maximise parallelism
-	Glib::Mutex::Lock lock(_mutex);
+  Glib::Mutex::Lock lock(_step_mutex);
 
 	// NOTE: Be sure to read the *ORIGINAL* documentation in the design document for this method!