mg2d: make the cfl factor runtime-configurable

3 files changed, 7 insertions, 1 deletions

diff --git a/libmg2d.v b/libmg2d.v
index e4b7b24..a51d313 100644
--- a/libmg2d.v
+++ b/libmg2d.v
@@ -1,4 +1,4 @@
-LIBMG2D_2 {
+LIBMG2D_3 {
     global: mg2d_*;
     local: *;
 };
diff --git a/mg2d.c b/mg2d.c
index cc75a6e..f64e0ae 100644
--- a/mg2d.c
+++ b/mg2d.c
@@ -421,6 +421,7 @@ static int mg_levels_init(MG2DContext *ctx)
         cur->solver->cpuflags = priv->cpuflags;
 
         cur->solver->fd_stencil = ctx->fd_stencil;
+        cur->solver->relax_factor = ctx->cfl_factor;
 
         prev = cur;
         cur  = cur->child;
diff --git a/mg2d.h b/mg2d.h
index c487215..f697b76 100644
--- a/mg2d.h
+++ b/mg2d.h
@@ -267,6 +267,11 @@ typedef struct MG2DContext {
      * Set to 0 to autodetect. Defaults to 1.
      */
     unsigned int nb_threads;
+
+    /**
+     * Time-stepping factor to use for relaxation.
+     */
+    double cfl_factor;
 } MG2DContext;
 
 /**