X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Flinreg.c;h=47d21cf8f5fdfed7f357f96f45038493374b6aab;hb=bb0e1c1f8b1a87a0ccd9bb4ffb22466475a47b7f;hp=7c85634a50fd28e558cdb8cfef0d38d30da79838;hpb=e8566274867b259ca29b7ae8c867194099fc27f4;p=pspp

diff --git a/src/math/linreg.c b/src/math/linreg.c
index 7c85634a50..47d21cf8f5 100644
--- a/src/math/linreg.c
+++ b/src/math/linreg.c
@@ -107,14 +107,20 @@ linreg_alloc (const struct variable *depvar, const struct variable **indep_vars,
   c->pred = NULL;
   c->resid = NULL;
 
+  c->refcnt = 1;
   return c;
 }
 
-bool
-linreg_free (void *m)
+void
+linreg_ref (linreg *c)
+{
+  c->refcnt++;
+}
+
+void
+linreg_unref (linreg *c)
 {
-  linreg *c = m;
-  if (c != NULL)
+  if (c && --c->refcnt == 0)
     {
       gsl_vector_free (c->indep_means);
       gsl_vector_free (c->indep_std);
@@ -124,7 +130,6 @@ linreg_free (void *m)
       free (c->coeff);
       free (c);
     }
-  return true;
 }
 
 static void