General robustification.

[u/mdw/catacomb] / mparena.c

diff --git a/mparena.c b/mparena.c
index 95f88d5..b9b1f84 100644 (file)
--- a/mparena.c
+++ b/mparena.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mparena.c,v 1.5 2000/06/17 11:35:48 mdw Exp $
+ * $Id: mparena.c,v 1.6 2004/04/03 03:32:05 mdw Exp $
  *
  * Allocation and freeing of MP buffers
  *
@@ -30,6 +30,9 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: mparena.c,v $
+ * Revision 1.6  2004/04/03 03:32:05  mdw
+ * General robustification.
+ *
  * Revision 1.5  2000/06/17 11:35:48  mdw
  * Overhaul to use mLib's arena system underneath.
  *
@@ -214,6 +217,8 @@ unsigned mparena_count(mparena *a)
 mpw *mpalloc(mparena *a, size_t sz)
 {
   mpw *v;
+  if (!sz) return (0);
+  a->n++;
   v = A_ALLOC(a->a, MPWS(sz));
   if (!v)
     THROW(EXC_NOMEM);
@@ -314,6 +319,8 @@ again:
 
 void mpfree(mparena *a, mpw *v)
 {
+  if (!v) return;
+  a->n--;
   A_FREE(a->a, v);
 }