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Implementation of timestamp in both datastore and journalstore

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This commit is contained in:
jmjatlanta 2017-09-04 17:10:57 -05:00
parent bf87d93136
commit bf7ba9049c
9 changed files with 393 additions and 108 deletions
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28
include/ipfs/repo/fsrepo/journalstore.h
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@ -8,6 +8,7 @@
#include "lmdb.h"
#include "libp2p/db/datastore.h"
#include "ipfs/repo/fsrepo/lmdb_cursor.h"
struct JournalRecord {
unsigned long long timestamp; // the timestamp of the file
@ -23,19 +24,40 @@ int lmdb_journal_record_free(struct JournalRecord* rec);
/**
* Open a cursor to the journalstore table
* @param db_handle a handle to the database (an MDB_env pointer)
* @param cursor where to place the results
* @returns true(1) on success, false(0) otherwise
*/
int repo_journalstore_cursor_open(struct Datastore* datastore, void** cursor);
int lmdb_journalstore_cursor_open(void* db_handle, struct lmdb_trans_cursor **cursor);
/**
* Read a record from the cursor
*/
int repo_journalstore_cursor_get(struct Datastore* datastore, void* cursor, enum DatastoreCursorOp op, struct JournalRecord** record);
int lmdb_journalstore_cursor_get(struct lmdb_trans_cursor *cursor, enum DatastoreCursorOp op, struct JournalRecord** record);
/***
* Write the record at the cursor
* @param crsr the cursor
* @param journal_record the record to write
* @returns true(1) on success, false(0) otherwise
*/
int lmdb_journalstore_cursor_put(struct lmdb_trans_cursor *crsr, struct JournalRecord* journal_record);
/**
* Close the cursor
*/
int repo_journalstore_cursor_close(struct Datastore* datastore, void* cursor);
int lmdb_journalstore_cursor_close(struct lmdb_trans_cursor *cursor);
int journal_record_free(struct JournalRecord* rec);
int lmdb_journalstore_journal_add(MDB_txn* mdb_txn, struct JournalRecord* record);
/***
* Attempt to get a specific record identified by its timestamp and bytes
* @param handle a handle to the database engine
* @param journalstore_cursor the cursor (will be returned as a cursor that points to the record found
* @param journalstore_record where to put the results (can pass null). If data is within the struct, will use it as search criteria
* @returns true(1) on success, false(0) otherwise
*/
int lmdb_journalstore_get_record(void* handle, struct lmdb_trans_cursor *journalstore_cursor, struct JournalRecord **journalstore_record);

22
include/ipfs/repo/fsrepo/lmdb_cursor.h Normal file
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@ -0,0 +1,22 @@
#pragma once
#include "lmdb.h"
struct lmdb_trans_cursor {
MDB_txn* transaction;
MDB_dbi* database;
MDB_cursor* cursor;
};
/**
* Create a new lmdb_trans_cursor struct
* @returns a newly allocated trans_cursor struct
*/
struct lmdb_trans_cursor* lmdb_trans_cursor_new();
/***
* Clean up resources from a lmdb_trans_cursor struct
* @param in the cursor
* @returns true(1)
*/
int lmdb_trans_cursor_free(struct lmdb_trans_cursor* in);

5
include/ipfs/repo/fsrepo/lmdb_datastore.h
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@ -3,11 +3,6 @@
#include "lmdb.h"
#include "libp2p/db/datastore.h"
struct lmdb_trans_cursor {
MDB_txn* transaction;
MDB_cursor* cursor;
};
/***
* Places the LMDB methods into the datastore's function pointers
* @param datastore the datastore to fill