| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_LEDGER_BIN_STORAGE_IMPL_BTREE_DIFF_H_ |
| #define SRC_LEDGER_BIN_STORAGE_IMPL_BTREE_DIFF_H_ |
| |
| #include <lib/fit/function.h> |
| |
| #include <functional> |
| |
| #include "src/ledger/bin/storage/impl/btree/tree_node.h" |
| #include "src/ledger/bin/storage/public/types.h" |
| #include "src/ledger/lib/coroutine/coroutine.h" |
| |
| namespace storage { |
| namespace btree { |
| |
| // Iterates through the differences between two trees given their root ids |
| // |base_root_id| and |other_root_id| and calls |on_next| on found differences. |
| // Returning false from |on_next| will immediately stop the iteration. |on_done| |
| // is called once, upon successfull completion, i.e. when there are no more |
| // differences or iteration was interrupted, or if an error occurs. |
| void ForEachDiff(coroutine::CoroutineService* coroutine_service, |
| PageStorage* page_storage, |
| ObjectIdentifier base_root_identifier, |
| ObjectIdentifier other_root_identifier, std::string min_key, |
| fit::function<bool(EntryChange)> on_next, |
| fit::function<void(Status)> on_done); |
| |
| // Iterates through the differences between three trees given their root ids and |
| // calls |on_next| if any difference is found between any pair. |
| // Returning false from |on_next| will immediately stop the iteration. |on_done| |
| // is called once, upon successful completion, i.e. when there are no more |
| // differences or iteration was interrupted, or if an error occurs. |
| void ForEachThreeWayDiff(coroutine::CoroutineService* coroutine_service, |
| PageStorage* page_storage, |
| ObjectIdentifier base_root_identifier, |
| ObjectIdentifier left_root_identifier, |
| ObjectIdentifier right_root_identifier, |
| std::string min_key, |
| fit::function<bool(ThreeWayChange)> on_next, |
| fit::function<void(Status)> on_done); |
| |
| } // namespace btree |
| } // namespace storage |
| |
| #endif // SRC_LEDGER_BIN_STORAGE_IMPL_BTREE_DIFF_H_ |