--- a/plugger.py	Wed Sep 03 17:28:17 2008 +0200
+++ b/plugger.py	Thu Sep 04 14:57:52 2008 +0200
@@ -1349,7 +1349,7 @@
                         WeakCallableDict, data_log, status = data_tuple
                         data_log.append((debug_tick, value))
                         for weakcallable,(args,kwargs) in WeakCallableDict.iteritems():
-                            wx.CallAfter(weakcallable, value, *args, **kwargs)
+                            wx.CallAfter(weakcallable.SetValue, value, *args, **kwargs)
             elif debug_vars is not None:
                 wx.CallAfter(self.logger.write_warning, 
                              "debug data not coherent %d != %d"%(len(debug_vars), len(self.TracedIECPath)))
@@ -1383,7 +1383,7 @@
 #                    self.buf = None
 #                def setbuf(self,buf):
 #                    self.buf = buf
-#                def __call__(self, value, idx, name):
+#                def SetValue(self, value, idx, name):
 #                    print "debug call:", value, idx, name, self.buf
 #            a = tmpcls()
 #            res = self.SubscribeDebugIECVariable(IEC_Path, a, idx, IEC_Path)

--- a/targets/Linux/plc_Linux_main.c	Wed Sep 03 17:28:17 2008 +0200
+++ b/targets/Linux/plc_Linux_main.c	Thu Sep 04 14:57:52 2008 +0200
@@ -5,7 +5,7 @@
 #include <stdlib.h>
 #include <pthread.h> 
 
-long AtomicCompareExchange(long* atomicvar,long exchange, long compared)
+long AtomicCompareExchange(long* atomicvar,long compared, long exchange)
 {
     return __sync_val_compare_and_swap(atomicvar, compared, exchange);
 }
@@ -95,9 +95,9 @@
 {
     /* Eventually unlock debugger thread*/
     __debug_tick = -1;
-    pthread_mutex_lock(&wait_mutex);
+    //pthread_mutex_lock(&wait_mutex);
     pthread_cond_broadcast(&wait_cond);
-    pthread_mutex_unlock(&wait_mutex);
+    //pthread_mutex_unlock(&wait_mutex);
 }
 
 int stopPLC()
@@ -126,7 +126,7 @@
 {
     /* signal debugger thread to continue*/
     __debug_tick = __tick;
-    pthread_mutex_lock(&wait_mutex);
+    //pthread_mutex_lock(&wait_mutex);
     pthread_cond_broadcast(&wait_cond);
-    pthread_mutex_unlock(&wait_mutex);
+    //pthread_mutex_unlock(&wait_mutex);
 }

--- a/targets/plc_common_main.c	Wed Sep 03 17:28:17 2008 +0200
+++ b/targets/plc_common_main.c	Thu Sep 04 14:57:52 2008 +0200
@@ -33,7 +33,7 @@
  **/
  
 IEC_TIME __CURRENT_TIME;
-int __tick = 0;
+int __tick = -1;
 
 static int init_level = 0;
 static int Debugging = 0;
@@ -50,6 +50,8 @@
  **/
 void __run()
 {
+    __tick++;
+
     %(retrieve_calls)s
 
     if(Debugging) __retrieve_debug();
@@ -62,7 +64,6 @@
     
     %(publish_calls)s
 
-    __tick++;
 }
 
 /*

--- a/targets/plc_debug.c	Wed Sep 03 17:28:17 2008 +0200
+++ b/targets/plc_debug.c	Thu Sep 04 14:57:52 2008 +0200
@@ -136,17 +136,28 @@
         &buffer_state,
         BUFFER_BUSY,
         BUFFER_FREE);
-    subscription_cursor = subscription_table;
 }
 
 void* IterDebugData(int* idx, const char **type_name)
 {
     if(subscription_cursor < latest_subscription){
+        char* old_cursor = buffer_cursor;
         *idx = *subscription_cursor;
         struct_plcvar* my_var = &variable_table[*(subscription_cursor++)];
         *type_name = __get_type_enum_name(my_var->type);
-        return my_var->ptrvalue;
+        /* get variable size*/
+        USINT size = __get_type_enum_size(my_var->type);
+        /* compute next cursor positon*/
+        buffer_cursor = buffer_cursor + size;
+        if(old_cursor < debug_buffer + BUFFER_SIZE)
+        {
+            return old_cursor;
+        }else{
+            return NULL;
+        } 
     }
+    *idx = -1;
+    *type_name = NULL;
     return NULL;
 }