fetch()

Fetch a Value from the Store. More...

Collaboration diagram for fetch():

Functions
static void *	store_gdbm_fetch (StoreHandle *store, const char *key, size_t klen, size_t *vlen)
	Fetch a Value from the Store - Implements StoreOps::fetch() -.
static void *	store_lmdb_fetch (StoreHandle *store, const char *key, size_t klen, size_t *vlen)
	Fetch a Value from the Store - Implements StoreOps::fetch() -.
static void *	store_rocksdb_fetch (StoreHandle *store, const char *key, size_t klen, size_t *vlen)
	Fetch a Value from the Store - Implements StoreOps::fetch() -.
static void *	store_tdb_fetch (StoreHandle *store, const char *key, size_t klen, size_t *vlen)
	Fetch a Value from the Store - Implements StoreOps::fetch() -.

Detailed Description

Fetch a Value from the Store.

Parameters

[in]	store	Store retrieved via open()
[in]	key	Key identifying the record
[in]	klen	Length of the Key string
[out]	vlen	Length of the Value

Return values

ptr	Success, Value associated with the Key
NULL	Error, or Key not found

Function Documentation

store_gdbm_fetch()

static void * store_gdbm_fetch ( StoreHandle * store, const char * key, size_t klen, size_t * vlen )

static

Fetch a Value from the Store - Implements StoreOps::fetch() -.

Definition at line 64 of file gdbm.c.

{
  if (!store || (klen > INT_MAX))
    return NULL;
 
  datum dkey = { 0 };
  datum data = { 0 };
 
  // Decloak an opaque pointer
  GDBM_FILE db = store;
 
  dkey.dptr = (char *) key;
  dkey.dsize = klen;
  data = gdbm_fetch(db, dkey);
 
  *vlen = data.dsize;
  return data.dptr;
}

store_lmdb_fetch()

static void * store_lmdb_fetch ( StoreHandle * store, const char * key, size_t klen, size_t * vlen )

static

Fetch a Value from the Store - Implements StoreOps::fetch() -.

Definition at line 212 of file lmdb.c.

{
  if (!store)
    return NULL;
 
  *vlen = 0;
 
  MDB_val dkey = { 0 };
  MDB_val data = { 0 };
 
  // Decloak an opaque pointer
  struct LmdbStoreData *sdata = store;
 
  dkey.mv_data = (void *) key;
  dkey.mv_size = klen;
  data.mv_data = NULL;
  data.mv_size = 0;
  int rc = lmdb_get_read_txn(sdata);
  if (rc != MDB_SUCCESS)
  {
    sdata->txn = NULL;
    mutt_debug(LL_DEBUG2, "txn_renew: %s\n", mdb_strerror(rc));
    return NULL;
  }
  rc = mdb_get(sdata->txn, sdata->db, &dkey, &data);
  if (rc == MDB_NOTFOUND)
  {
    return NULL;
  }
  if (rc != MDB_SUCCESS)
  {
    mutt_debug(LL_DEBUG2, "mdb_get: %s\n", mdb_strerror(rc));
    return NULL;
  }
 
  *vlen = data.mv_size;
  return data.mv_data;
}

Here is the call graph for this function:

store_rocksdb_fetch()

static void * store_rocksdb_fetch ( StoreHandle * store, const char * key, size_t klen, size_t * vlen )

static

Fetch a Value from the Store - Implements StoreOps::fetch() -.

Definition at line 124 of file rocksdb.c.

{
  if (!store)
    return NULL;
 
  // Decloak an opaque pointer
  struct RocksDbStoreData *sdata = store;
 
  void *rv = rocksdb_get(sdata->db, sdata->read_options, key, klen, vlen, &sdata->err);
  if (sdata->err)
  {
    rocksdb_free(sdata->err);
    sdata->err = NULL;
    return NULL;
  }
 
  return rv;
}

store_tdb_fetch()

static void * store_tdb_fetch ( StoreHandle * store, const char * key, size_t klen, size_t * vlen )

static

Fetch a Value from the Store - Implements StoreOps::fetch() -.

Definition at line 64 of file tdb.c.

{
  if (!store)
    return NULL;
 
  // Decloak an opaque pointer
  TDB_CONTEXT *db = store;
  TDB_DATA dkey;
  TDB_DATA data;
 
  dkey.dptr = (unsigned char *) key;
  dkey.dsize = klen;
  data = tdb_fetch(db, dkey);
 
  *vlen = data.dsize;
  return data.dptr;
}