--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cs/riviera/support/exception.c	Fri May 15 01:28:16 2020 +0000
@@ -0,0 +1,140 @@
+/*
+ ******************************
+ * 
+ *
+ * Initialial version: Laurent Deniau, Laurent.Deniau@cern.ch
+ *
+ * For more information, please see the paper:
+ * http://cern.ch/Laurent.Deniau/html/oopc/exception.html
+ * 
+ * -----------------------------------------------------------
+ *
+ * Strong rework and adaption to riviera by Christophe Favergeon
+ *
+ ******************************
+ */
+
+// Authorization to use this source code communicated to Christophe Favergeon
+// by email
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "support/exception.h"
+
+#ifndef _WINDOWS
+  #include "config/swconfig.cfg"
+#endif
+
+
+/* global stack of exception context */
+struct _exceptionContext_ *const _returnExceptionContext_[MAX_RVF_TASKS]=
+#if (!GSMLITE)
+  {NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
+  NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};
+#else
+  {NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};
+#endif
+
+struct _exceptionContext_ *_currentExceptionContext_ [MAX_RVF_TASKS]= 
+#if (!GSMLITE)
+  {NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
+  NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};
+#else
+  {NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};
+#endif
+
+/* delete protected pointers and throw exception */
+void
+_exceptionThrow_(int exception)
+{
+  struct _protectedPtr_ *p;
+  struct _protectedPtr_ *oldp;
+
+  /* no exception context saved, exit program */
+  if (!_currentExceptionContext_[rvf_get_taskid()]) exit(exception); 
+
+  /* free pointers stored on the current exception context pointers stack */
+  p=_currentExceptionContext_[rvf_get_taskid()]->stack;
+
+  while(p)
+  {
+	  oldp=p->previous;
+	  p->func(p->ptr);
+	  rvf_free_buf(p);
+	  p=oldp;
+  }
+
+  _currentExceptionContext_[rvf_get_taskid()]->stack=NULL;
+
+  /* jump to previous exception context */
+  rvf_restore_context_buffer_(_currentExceptionContext_[rvf_get_taskid()]->context, exception); 
+} 
+
+
+// Protect a pointer when there is a try/ctahc block active
+void rvf_protect_pointer(T_RVF_MB_ID mb_id,void *p,T_RVF_RELEASE_PROTECTED_POINTER func)
+{
+
+	struct _protectedPtr_ *ptr;
+	struct _exceptionContext_ *context;
+	T_RVF_MB_STATUS err;
+
+
+
+	if (_currentExceptionContext_[rvf_get_taskid()])
+	{
+
+	if (p==NULL)
+		throw(E_not_enough_memory);
+
+	context=_currentExceptionContext_[rvf_get_taskid()];
+	err=rvf_get_buf(mb_id,sizeof(struct _protectedPtr_),(void*)&ptr);
+	
+
+	if (err==RVF_GREEN)
+	{
+		ptr->next=NULL;
+	    ptr->previous=NULL;
+	    ptr->ptr=p;
+	    ptr->func=func;
+
+         if (context->stack==NULL)
+		 {
+			  context->stack=ptr;
+		 }
+		 else
+		 {
+			  ptr->previous=context->stack;
+			  context->stack->next=ptr;
+			  context->stack=ptr;
+		 }
+	 }
+	 else
+	 {
+		 if (p!=NULL)
+		   rvf_free_buf(p);
+		 throw(E_not_enough_memory);
+	 }
+	}
+}
+
+void rvf_forget_protected_ptr()
+{
+   struct _protectedPtr_ *p;
+   struct _protectedPtr_ *oldp;
+
+   p=_currentExceptionContext_[rvf_get_taskid()]->stack;
+
+   while(p)
+   {
+	   oldp=p->previous;
+	   rvf_free_buf(p);
+	   p=oldp;
+   }
+
+   _currentExceptionContext_[rvf_get_taskid()]->stack=NULL;
+}
+
+
+