diff --git a/include/astaroth.h b/include/astaroth.h
index d32b367..8db7608 100644
--- a/include/astaroth.h
+++ b/include/astaroth.h
@@ -303,9 +303,15 @@ AcResult acGridStoreMesh(const Stream stream, AcMesh* host_mesh);
 /** */
 AcResult acGridIntegrate(const Stream stream, const AcReal dt);
 
+/** */
+AcResult acGridIntegrateNonperiodic(const Stream stream, const AcReal dt);
+
 /** */
 AcResult acGridPeriodicBoundconds(const Stream stream);
 
+/** */
+AcResult acGridGeneralBoundconds(const Device device, const Stream stream);
+
 /** TODO */
 AcResult acGridReduceScal(const Stream stream, const ReductionType rtype,
                           const VertexBufferHandle vtxbuf_handle, AcReal* result);
@@ -562,6 +568,16 @@ AcResult acDevicePeriodicBoundcondStep(const Device device, const Stream stream,
 AcResult acDevicePeriodicBoundconds(const Device device, const Stream stream, const int3 start,
                                     const int3 end);
 
+/** */
+AcResult acDeviceGeneralBoundcondStep(const Device device, const Stream stream,
+                                      const VertexBufferHandle vtxbuf_handle, const int3 start,
+                                      const int3 end, const int3 bindex);
+
+/** */
+AcResult acDeviceGeneralBoundconds(const Device device, const Stream stream, const int3 start,
+                                   const int3 end, const int3 bindex);
+
+
 /** */
 AcResult acDeviceReduceScal(const Device device, const Stream stream, const ReductionType rtype,
                             const VertexBufferHandle vtxbuf_handle, AcReal* result);