mg2d: add MG2DContext.adaptive_step

Unused, for API compatibility with the adaptive step branch.

3 files changed, 12 insertions, 1 deletions

diff --git a/libmg2d.v b/libmg2d.v
index 526ba87..4eced76 100644
--- a/libmg2d.v
+++ b/libmg2d.v
@@ -1,4 +1,4 @@
-LIBMG2D_14 {
+LIBMG2D_15 {
     global: mg2d_*;
     local: *;
 };
diff --git a/mg2d.c b/mg2d.c
index 58886cd..dec0c18 100644
--- a/mg2d.c
+++ b/mg2d.c
@@ -1495,6 +1495,12 @@ static int mg_levels_alloc(MG2DContext *ctx)
 
     int ret = 0;
 
+    if (ctx->adaptive_step) {
+        mg2di_log(&priv->logger, MG2D_LOG_ERROR,
+                  "Adaptive stepping not supported.\n");
+        return -EINVAL;
+    }
+
     /* compute the levels geometries/partitioning */
     ret = mg_dh_init(&priv->dh, priv->dg, ctx->step, ctx->max_levels);
     if (ret < 0) {
diff --git a/mg2d.h b/mg2d.h
index 8f48361..af83345 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;
+
+    /**
+     * Unused, do not set.
+     */
+    int adaptive_step;
 } MG2DContext;
 
 /**