Addresses #368

Deals with NULL transactions in an INIT_TXN environment.
Does not deal with NULL txn cursors yet.
Also adds DB_AUTO_COMMIT

git-svn-id: file:///svn/tokudb@2252 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brt.c

@@ -1999,10 +1999,14 @@ static inline void brt_cursor_cleanup(BRT_CURSOR cursor) {
     dbt_cleanup(&cursor->val);
 }
 
-inline int brt_cursor_not_set(BRT_CURSOR cursor) {
+static inline int brt_cursor_not_set(BRT_CURSOR cursor) {
     return cursor->key.data == 0 || cursor->val.data == 0;
 }
 
+BOOL toku_brt_cursor_uninitialized(BRT_CURSOR c) {
+    return brt_cursor_not_set(c);
+}
+
 static inline void brt_cursor_set_key_val(BRT_CURSOR cursor, DBT *newkey, DBT *newval) {
     brt_cursor_cleanup(cursor);
     cursor->key = *newkey; memset(newkey, 0, sizeof *newkey);

newbrt/brt.h

@@ -51,6 +51,7 @@ int toku_brt_cursor (BRT, BRT_CURSOR*);
 int toku_brt_cursor_get (BRT_CURSOR cursor, DBT *kbt, DBT *vbt, int brtc_flags, TOKUTXN);
 int toku_brt_cursor_delete(BRT_CURSOR cursor, int flags, TOKUTXN);
 int toku_brt_cursor_close (BRT_CURSOR curs);
+BOOL toku_brt_cursor_uninitialized(BRT_CURSOR c);
 
 typedef struct brtenv *BRTENV;
 int brtenv_checkpoint (BRTENV env);