mg2d: add support for adaptive step sizeadaptive_step

1 files changed, 5 insertions, 0 deletions

diff --git a/mg2d.h b/mg2d.h
index 8f48361..56e129f 100644
--- a/mg2d.h
+++ b/mg2d.h
@@ -246,6 +246,11 @@ typedef struct MG2DContext {
      * Set by mg2d_solve() if it returns 0 or MG2D_ERR_MAXITER_REACHED.
      */
     double residual_max;
+
+    /**
+     * Use adaptive stepping for relaxation.
+     */
+    int adaptive_step;
 } MG2DContext;
 
 /**