Maintain a free list for tree_cache structs

diff --git a/common/alloc.c b/common/alloc.c
index dcf4672d6e7c3efb77d140172f57065933783fd8..7799fc377721e9813aecf7edf267686153079571 100644 (file)
--- a/common/alloc.c
+++ b/common/alloc.c
@@ -42,7 +42,7 @@
 
 #ifndef lint
 static char copyright[] =
-"$Id: alloc.c,v 1.9 1996/08/28 01:19:42 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium.  All rights reserved.\n";
+"$Id: alloc.c,v 1.10 1997/03/05 06:34:27 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium.  All rights reserved.\n";
 #endif /* not lint */
 
 #include "dhcpd.h"
@@ -96,10 +96,22 @@ struct tree *new_tree (name)
        return rval;
 }
 
+struct tree_cache *free_tree_caches;
+
 struct tree_cache *new_tree_cache (name)
        char *name;
 {
-       struct tree_cache *rval = dmalloc (sizeof (struct tree_cache), name);
+       struct tree_cache *rval;
+
+       if (free_tree_caches) {
+               rval = free_tree_caches;
+               free_tree_caches =
+                       (struct tree_cache *)(rval -> value);
+       } else {
+               rval = dmalloc (sizeof (struct tree_cache), name);
+               if (!rval)
+                       error ("unable to allocate tree cache for %s.", name);
+       }
        return rval;
 }
 
@@ -222,7 +234,8 @@ void free_tree_cache (ptr, name)
        struct tree_cache *ptr;
        char *name;
 {
-       dfree ((VOIDPTR)ptr, name);
+       ptr -> value = (unsigned char *)free_tree_caches;
+       free_tree_caches = ptr;
 }
 
 void free_packet (ptr, name)