fetch()

Fetch a Value from the Store. More...

Collaboration diagram for fetch():

Functions
static void *	store_bdb_fetch (void *store, const char *key, size_t klen, size_t *vlen)
	Implements StoreOps::fetch() -. More...
static void *	store_gdbm_fetch (void *store, const char *key, size_t klen, size_t *vlen)
	Implements StoreOps::fetch() -. More...
static void *	store_kyotocabinet_fetch (void *store, const char *key, size_t klen, size_t *vlen)
	Implements StoreOps::fetch() -. More...
static void *	store_lmdb_fetch (void *store, const char *key, size_t klen, size_t *vlen)
	Implements StoreOps::fetch() -. More...
static void *	store_qdbm_fetch (void *store, const char *key, size_t klen, size_t *vlen)
	Implements StoreOps::fetch() -. More...
static void *	store_rocksdb_fetch (void *store, const char *key, size_t klen, size_t *vlen)
	Implements StoreOps::fetch() -. More...
static void *	store_tokyocabinet_fetch (void *store, const char *key, size_t klen, size_t *vlen)
	Implements StoreOps::fetch() -. More...
static void *	store_tdb_fetch (void *store, const char *key, size_t klen, size_t *vlen)
	Implements StoreOps::fetch() -. More...

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_bdb_fetch()

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

static

Implements StoreOps::fetch() -.

Definition at line 158 of file bdb.c.

{
  if (!store)
    return NULL;
 
  DBT dkey;
  DBT data;
 
  struct StoreDbCtx *ctx = store;
 
  dbt_init(&dkey, (void *) key, klen);
  dbt_empty_init(&data);
  data.flags = DB_DBT_MALLOC;
 
  ctx->db->get(ctx->db, NULL, &dkey, &data, 0);
 
  *vlen = data.size;
  return data.data;
}

Here is the call graph for this function:

store_gdbm_fetch()

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

static

Implements StoreOps::fetch() -.

Definition at line 60 of file gdbm.c.

{
  if (!store)
    return NULL;
 
  datum dkey;
  datum data;
 
  GDBM_FILE db = store;
 
  dkey.dptr = (char *) key;
  dkey.dsize = klen;
  data = gdbm_fetch(db, dkey);
 
  *vlen = data.dsize;
  return data.dptr;
}

store_kyotocabinet_fetch()

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

static

Implements StoreOps::fetch() -.

Definition at line 71 of file kc.c.

{
  if (!store)
    return NULL;
 
  KCDB *db = store;
  return kcdbget(db, key, klen, vlen);
}

store_lmdb_fetch()

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

static

Implements StoreOps::fetch() -.

Definition at line 189 of file lmdb.c.

{
  if (!store)
    return NULL;
 
  MDB_val dkey;
  MDB_val data;
 
  struct StoreLmdbCtx *ctx = store;
 
  dkey.mv_data = (void *) key;
  dkey.mv_size = klen;
  data.mv_data = NULL;
  data.mv_size = 0;
  int rc = mdb_get_r_txn(ctx);
  if (rc != MDB_SUCCESS)
  {
    ctx->txn = NULL;
    mutt_debug(LL_DEBUG2, "txn_renew: %s\n", mdb_strerror(rc));
    return NULL;
  }
  rc = mdb_get(ctx->txn, ctx->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_qdbm_fetch()

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

static

Implements StoreOps::fetch() -.

Definition at line 55 of file qdbm.c.

{
  if (!store)
    return NULL;
 
  VILLA *db = store;
  int sp = 0;
  void *rv = vlget(db, key, klen, &sp);
  *vlen = sp;
  return rv;
}

store_rocksdb_fetch()

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

static

Implements StoreOps::fetch() -.

Definition at line 92 of file rocksdb.c.

{
  if (!store)
    return NULL;
 
  struct RocksDbCtx *ctx = store;
 
  void *rv = rocksdb_get(ctx->db, ctx->read_options, key, klen, vlen, &ctx->err);
  if (ctx->err)
  {
    rocksdb_free(ctx->err);
    ctx->err = NULL;
    return NULL;
  }
 
  return rv;
}

store_tokyocabinet_fetch()

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

static

Implements StoreOps::fetch() -.

Definition at line 64 of file tc.c.

{
  if (!store)
    return NULL;
 
  int sp = 0;
  TCBDB *db = store;
  void *rv = tcbdbget(db, key, klen, &sp);
  *vlen = sp;
  return rv;
}

store_tdb_fetch()

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

static

Implements StoreOps::fetch() -.

Definition at line 57 of file tdb.c.

{
  if (!store)
    return NULL;
 
  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;
}