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diff --git a/dol/src/dol/visitor/yapi/lib/dolSupport.h b/dol/src/dol/visitor/yapi/lib/dolSupport.h
new file mode 100644
index 0000000..897516f
--- /dev/null
+++ b/dol/src/dol/visitor/yapi/lib/dolSupport.h
@@ -0,0 +1,67 @@
+#ifndef DOLSUPPORT_H
+#define DOLSUPPORT_H
+
+#include "dol.h"
+#include "yapi.h"
+
+#define DOL_write(port, buf, len, process) \
+    dolwrite(static_cast<OutPort<char> *>(port), buf, len, process)
+#define DOL_read(port, buf, len, process) \
+    dolread(static_cast<InPort<char> *>(port), buf, len, process)
+
+void DOL_detach(DOLProcess* p);
+
+//fifo access functions
+unsigned dolwrite(OutPort<char> *out, const void *buf, unsigned len, const DOLProcess *process);
+unsigned dolread(InPort<char> *in, const void *buf, unsigned len, const DOLProcess *process);
+
+void createPort(void **port,
+                void *base,
+                int number_of_indices,
+                int index0, int range0);
+
+void createPort(void **port,
+                void *base,
+                int number_of_indices,
+                int index0, int range0,
+                int index1, int range1);
+
+void createPort(void **port,
+                void *base,
+                int number_of_indices,
+                int index0, int range0,
+                int index1, int range1,
+                int index2, int range2);
+
+void createPort(void **port,
+                void *base,
+                int number_of_indices,
+                int index0, int range0,
+                int index1, int range1,
+                int index2, int range2,
+                int index3, int range3);
+
+#define GETINDEX(dimension) \
+  static_cast<ProcessWrapper *>(p->wptr)->getIndex(dimension)
+
+/**
+ * macro to create a variable to store a port name
+ *
+ * @param name name of the variable
+ */
+#define CREATEPORTVAR(name) void *name
+
+/**
+ * Create the port name of an iterated port based on its basename and the
+ * given indices.
+ *
+ * @param port buffer where the result is stored (created using
+ *             CREATEPORTVAR)
+ * @param base basename of the port
+ * @param number_of_indices number of dimensions of the port
+ * @param index_range_pairs index and range values for each dimension
+ */
+#define CREATEPORT(port, base, number_of_indices, index_range_pairs...) \
+  createPort((void**)(&port), base, number_of_indices, index_range_pairs)
+
+#endif