c-ipfs/repo/fsrepo/lmdb_datastore.c
John Jones c64a700223 The beginnings of datastore
A lot of code cleanup, plus beginning the implementation of a datastore.
2016-11-17 15:07:59 -05:00

60 lines
1.5 KiB
C

/***
* Here are the wrappers for the lightning database
*/
#include <stdlib.h>
#include "lmdb.h"
#include "ipfs/repo/fsrepo/lmdb_datastore.h"
/**
* Open an lmdb database with the given parameters.
* Note: for now, the parameters are not used
* @param argc number of parameters in the following array
* @param argv an array of parameters
*/
int repo_fsrepro_lmdb_open(int argc, char** argv, struct Datastore* datastore) {
// create environment
struct MDB_env* mdb_env;
int retVal = mdb_env_create(&mdb_env);
if (retVal < 0) {
mdb_env_close(mdb_env);
return 0;
}
// open the environment
retVal = mdb_env_open(mdb_env, datastore->path, 0, 755);
if (retVal < 0) {
mdb_env_close(mdb_env);
return 0;
}
datastore->handle = (void*)mdb_env;
return 1;
}
/***
* Close an LMDB database
* NOTE: for now, argc and argv are not used
* @param argc number of parameters in the argv array
* @param argv parameters to be passed in
* @param datastore the datastore struct that contains information about the opened database
*/
int repo_fsrepo_lmdb_close(int argc, char** argv, struct Datastore* datastore) {
struct MDB_env* mdb_env = (struct MDB_env*)datastore->handle;
mdb_env_close(mdb_env);
free(mdb_env);
return 1;
}
/***
* Places the LMDB methods into the datastore's function pointers
* @param datastore the datastore to fill
* @returns true(1) on success;
*/
int repo_fsrepo_lmdb_cast(struct Datastore* datastore) {
datastore->datastore_open = &repo_fsrepro_lmdb_open;
datastore->datastore_close = &repo_fsrepo_lmdb_close;
return 1;
}