diff -r 33e464fd6773 -r 12d5361e7472 cache/engine.h
--- a/cache/engine.h	Thu Aug 07 20:28:06 2008 +0300
+++ b/cache/engine.h	Fri Aug 08 00:15:29 2008 +0300
@@ -5,14 +5,23 @@
     /*
      * Allocate a `struct cache`-compatible struct and return it via cache_ptr.
      */
-    int (fn_init*) (struct cache_engine *engine, struct cache **cache_ptr);
+    int (*fn_init) (struct cache_engine *, struct cache **);
     
     /*
      * Allocate a `struct cache_op`-compatible struct and return it via cache_ptr.
      *
      * Begin the index lookup.
      */
-    int (fn_op_start*) (struct cache *cache, struct cache_op **op_ptr, struct cache_key *key);
+    int (*fn_op_start) (struct cache *, struct cache_op **, struct cache_key *);
+
+    /*
+     * Prepare to write and possibly read this cache entry.
+     *
+     * size_hint, if nonzero, provides a guess at the size of the cache entry that can be used to optimize stuff
+     */
+    int (*fn_op_begin_write) (struct cache_op *, size_t size_hint);
+
+    int (*fn_op_push) (struct cache_op *op, int fd, size_t *size);
 };
 
 #endif /* CACHE_ENGINE_H */