diff options
Diffstat (limited to 'src/backend/nodes/list.c')
| -rw-r--r-- | src/backend/nodes/list.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/src/backend/nodes/list.c b/src/backend/nodes/list.c index f843f861ef8..9d8f4fd5c7c 100644 --- a/src/backend/nodes/list.c +++ b/src/backend/nodes/list.c @@ -54,6 +54,7 @@ #define IsPointerList(l) ((l) == NIL || IsA((l), List)) #define IsIntegerList(l) ((l) == NIL || IsA((l), IntList)) #define IsOidList(l) ((l) == NIL || IsA((l), OidList)) +#define IsXidList(l) ((l) == NIL || IsA((l), XidList)) #ifdef USE_ASSERT_CHECKING /* @@ -71,7 +72,8 @@ check_list_invariants(const List *list) Assert(list->type == T_List || list->type == T_IntList || - list->type == T_OidList); + list->type == T_OidList || + list->type == T_XidList); } #else #define check_list_invariants(l) ((void) 0) @@ -384,6 +386,24 @@ lappend_oid(List *list, Oid datum) } /* + * Append a TransactionId to the specified list. See lappend() + */ +List * +lappend_xid(List *list, TransactionId datum) +{ + Assert(IsXidList(list)); + + if (list == NIL) + list = new_list(T_XidList, 1); + else + new_tail_cell(list); + + llast_xid(list) = datum; + check_list_invariants(list); + return list; +} + +/* * Make room for a new cell at position 'pos' (measured from 0). * The data in the cell is left undefined, and must be filled in by the * caller. 'list' is assumed to be non-NIL, and 'pos' must be a valid @@ -715,6 +735,26 @@ list_member_oid(const List *list, Oid datum) } /* + * Return true iff the TransactionId 'datum' is a member of the list. + */ +bool +list_member_xid(const List *list, TransactionId datum) +{ + const ListCell *cell; + + Assert(IsXidList(list)); + check_list_invariants(list); + + foreach(cell, list) + { + if (lfirst_oid(cell) == datum) + return true; + } + + return false; +} + +/* * Delete the n'th cell (counting from 0) in list. * * The List is pfree'd if this was the last member. |