libmdbx: merge to 0.2

1 files changed, 10 insertions, 7 deletions

diff --git a/libs/libmdbx/src/mdbx.h b/libs/libmdbx/src/mdbx.h
index 8720f34ae0..283f595df6 100644
--- a/libs/libmdbx/src/mdbx.h
+++ b/libs/libmdbx/src/mdbx.h
@@ -369,17 +369,17 @@ typedef enum MDBX_cursor_op {
   MDBX_GET_BOTH,       /* MDBX_DUPSORT-only: Position at key/data pair. */
   MDBX_GET_BOTH_RANGE, /* MDBX_DUPSORT-only: position at key, nearest data. */
   MDBX_GET_CURRENT,    /* Return key/data at current cursor position */
-  MDBX_GET_MULTIPLE,   /* MDBX_DUPFIXED-only: Return key and up to a page of
-                        * duplicate data items from current cursor position.
-                        * Move cursor to prepare for MDBX_NEXT_MULTIPLE.*/
+  MDBX_GET_MULTIPLE,   /* MDBX_DUPFIXED-only: Return up to a page of duplicate
+                        * data items from current cursor position.
+                        * Move cursor to prepare for MDBX_NEXT_MULTIPLE. */
   MDBX_LAST,           /* Position at last key/data item */
   MDBX_LAST_DUP,       /* MDBX_DUPSORT-only: Position at last data item
                         * of current key. */
   MDBX_NEXT,           /* Position at next data item */
   MDBX_NEXT_DUP,       /* MDBX_DUPSORT-only: Position at next data item
                         * of current key. */
-  MDBX_NEXT_MULTIPLE,  /* MDBX_DUPFIXED-only: Return key and up to a page of
-                        * duplicate data items from next cursor position.
+  MDBX_NEXT_MULTIPLE,  /* MDBX_DUPFIXED-only: Return up to a page of duplicate
+                        * data items from next cursor position.
                         * Move cursor to prepare for MDBX_NEXT_MULTIPLE. */
   MDBX_NEXT_NODUP,     /* Position at first data item of next key */
   MDBX_PREV,           /* Position at previous data item */
@@ -391,7 +391,7 @@ typedef enum MDBX_cursor_op {
   MDBX_SET_RANGE,      /* Position at first key greater than or equal to
                         * specified key. */
   MDBX_PREV_MULTIPLE   /* MDBX_DUPFIXED-only: Position at previous page and
-                        * return key and up to a page of duplicate data items. */
+                        * return up to a page of duplicate data items. */
 } MDBX_cursor_op;
 
 /* Return Codes
@@ -989,7 +989,7 @@ LIBMDBX_API int mdbx_env_set_assert(MDBX_env *env, MDBX_assert_func *func);
  * Returns A non-zero error value on failure and 0 on success, some
  * possible errors are:
  *  - MDBX_PANIC         - a fatal error occurred earlier and the environment
- *                        must be shut down.
+ *                         must be shut down.
  *  - MDBX_MAP_RESIZED   - another process wrote data beyond this MDBX_env's
  *                         mapsize and this environment's map must be resized
  *                         as well. See mdbx_env_set_mapsize().
@@ -1486,6 +1486,9 @@ LIBMDBX_API int mdbx_cursor_put(MDBX_cursor *cursor, MDBX_val *key,
 /* Delete current key/data pair
  *
  * This function deletes the key/data pair to which the cursor refers.
+ * This does not invalidate the cursor, so operations such as MDBX_NEXT
+ * can still be used on it. Both MDBX_NEXT and MDBX_GET_CURRENT will return
+ * the same record after this operation.
  *
  * [in] cursor  A cursor handle returned by mdbx_cursor_open()
  * [in] flags   Options for this operation. This parameter must be set to 0