| /* |
| Copyright 2020 Google LLC |
| |
| Use of this source code is governed by a BSD-style |
| license that can be found in the LICENSE file or at |
| https://developers.google.com/open-source/licenses/bsd |
| */ |
| |
| #ifndef REFTABLE_MERGED_H |
| #define REFTABLE_MERGED_H |
| |
| #include "reftable-iterator.h" |
| |
| /* |
| * Merged tables |
| * |
| * A ref database kept in a sequence of table files. The merged_table presents a |
| * unified view to reading (seeking, iterating) a sequence of immutable tables. |
| * |
| * The merged tables are on purpose kept disconnected from their actual storage |
| * (eg. files on disk), because it is useful to merge tables aren't files. For |
| * example, the per-workspace and global ref namespace can be implemented as a |
| * merged table of two stacks of file-backed reftables. |
| */ |
| |
| /* A merged table is implements seeking/iterating over a stack of tables. */ |
| struct reftable_merged_table; |
| |
| /* A generic reftable; see below. */ |
| struct reftable_table; |
| |
| /* reftable_new_merged_table creates a new merged table. It takes ownership of |
| the stack array. |
| */ |
| int reftable_new_merged_table(struct reftable_merged_table **dest, |
| struct reftable_table *stack, size_t n, |
| uint32_t hash_id); |
| |
| /* returns the max update_index covered by this merged table. */ |
| uint64_t |
| reftable_merged_table_max_update_index(struct reftable_merged_table *mt); |
| |
| /* returns the min update_index covered by this merged table. */ |
| uint64_t |
| reftable_merged_table_min_update_index(struct reftable_merged_table *mt); |
| |
| /* releases memory for the merged_table */ |
| void reftable_merged_table_free(struct reftable_merged_table *m); |
| |
| /* return the hash ID of the merged table. */ |
| uint32_t reftable_merged_table_hash_id(struct reftable_merged_table *m); |
| |
| /* create a generic table from reftable_merged_table */ |
| void reftable_table_from_merged_table(struct reftable_table *tab, |
| struct reftable_merged_table *table); |
| |
| #endif |