- Catch UserInterruptException launched from

PythonPolicy in Scheduler, but it cheerfully 
segfaults python...


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@464 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/pyloader/python_policy.cc

@@ -161,7 +161,8 @@ PythonPolicy::wait_unlock() const throw(UserInterruptException)
              // we shot it stone dead! Bang.
 
   bool still_locked;
-  do {
+  do 
+    {
       Py_UNBLOCK_THREADS;
       usleep(25000); // hack'a'ton! magggggiccc nummmbeeerrrrrs!!
       Py_BLOCK_THREADS;
@@ -171,9 +172,12 @@ PythonPolicy::wait_unlock() const throw(UserInterruptException)
       Py_DECREF(retval);    
 
       if(i++ > 120) 
+	{
 	  throw UserInterruptException("User-defined policy is " 
 				       "taking too long to terminate.");
-  } while(still_locked);
+	}
+    } 
+  while(still_locked);
 
   
   // What we should really do here:

src/backend/scheduler.cc

@@ -21,6 +21,9 @@
 #include "policy.hh"
 #include "scheduler.hh"
 #include "policy_manager.hh"
+#include "user_interrupt_exception.hh"
+
+#include <iostream>
 using namespace std;
 using namespace sgpem;
 using namespace memory;
@@ -78,6 +81,8 @@ Scheduler::get_policy()
 
 void
 Scheduler::step_forward()
+{
+  try 
     {
       Policy& policy = get_policy();
 	
@@ -189,3 +194,19 @@ Scheduler::step_forward()
       */
       h.enqueue_slice(_ready_queue);
     } 
+  catch( UserInterruptException e )
+    {
+      // FIXME : Naive.
+      cerr << "Exception: " << e.what() << endl;
+
+      // Errrrr.... you won't like this:
+      _policy_manager.init();
+      // https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1165761&group_id=5470
+      // maybe it's that??? oh, damn.
+      // or maybe not. see http://www.python.org/doc/2.4.2/api/initialization.html
+
+      // Tell: 
+      //    - the user that the policy sucks
+      //    - SimulationController that everything stopped
+    }
+}

src/builtin-policies/fcfs.py

@@ -15,6 +15,8 @@ class fcfs(Policy) :
         return -1
 
     def sort_queue(self, event, queue):
+    	#while True:
+	#	pass
         cmpf = lambda a, b: \
             a.get_schedulable().get_arrival_time() < \
             b.get_schedulable().get_arrival_time()