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src/subversion/subversion/libsvn_fs_base/bdb/txn-table.c  view on Meta::CPAN

  SVN_ERR(BDB_WRAP(fs, N_("allocating new transaction ID (getting 'next-key')"),
                   bfd->transactions->get(bfd->transactions, trail->db_txn,
                                          &query,
                                          svn_fs_base__result_dbt(&result),
                                          0)));
  svn_fs_base__track_dbt(&result, pool);

  /* Set our return value. */
  *id_p = apr_pstrmemdup(pool, result.data, result.size);

  /* Bump to future key. */
  len = result.size;
  svn_fs_base__next_key(result.data, &len, next_key);
  svn_fs_base__str_to_dbt(&query, NEXT_KEY_KEY);
  svn_fs_base__str_to_dbt(&result, next_key);
  svn_fs_base__trail_debug(trail, "transactions", "put");
  db_err = bfd->transactions->put(bfd->transactions, trail->db_txn,
                                  &query, &result, 0);

  return BDB_WRAP(fs, N_("bumping next transaction key"), db_err);
}


svn_error_t *
svn_fs_bdb__create_txn(const char **txn_name_p,
                       svn_fs_t *fs,
                       const svn_fs_id_t *root_id,
                       trail_t *trail,
                       apr_pool_t *pool)
{
  const char *txn_name;
  transaction_t txn;

  SVN_ERR(allocate_txn_id(&txn_name, fs, trail, pool));
  txn.kind = transaction_kind_normal;
  txn.root_id = root_id;
  txn.base_id = root_id;
  txn.proplist = NULL;
  txn.copies = NULL;
  txn.revision = SVN_INVALID_REVNUM;
  SVN_ERR(svn_fs_bdb__put_txn(fs, &txn, txn_name, trail, pool));

  *txn_name_p = txn_name;
  return SVN_NO_ERROR;
}


svn_error_t *
svn_fs_bdb__delete_txn(svn_fs_t *fs,
                       const char *txn_name,
                       trail_t *trail,
                       apr_pool_t *pool)
{
  base_fs_data_t *bfd = fs->fsap_data;
  DBT key;
  transaction_t *txn;

  /* Make sure TXN is dead. */
  SVN_ERR(svn_fs_bdb__get_txn(&txn, fs, txn_name, trail, pool));
  if (is_committed(txn))
    return svn_fs_base__err_txn_not_mutable(fs, txn_name);

  /* Delete the transaction from the `transactions' table. */
  svn_fs_base__str_to_dbt(&key, txn_name);
  svn_fs_base__trail_debug(trail, "transactions", "del");
  return BDB_WRAP(fs, N_("deleting entry from 'transactions' table"),
                  bfd->transactions->del(bfd->transactions,
                                         trail->db_txn, &key, 0));
}


svn_error_t *
svn_fs_bdb__get_txn(transaction_t **txn_p,
                    svn_fs_t *fs,
                    const char *txn_name,
                    trail_t *trail,
                    apr_pool_t *pool)
{
  base_fs_data_t *bfd = fs->fsap_data;
  DBT key, value;
  int db_err;
  svn_skel_t *skel;
  transaction_t *transaction;

  /* Only in the context of this function do we know that the DB call
     will not attempt to modify txn_name, so the cast belongs here.  */
  svn_fs_base__trail_debug(trail, "transactions", "get");
  db_err = bfd->transactions->get(bfd->transactions, trail->db_txn,
                                  svn_fs_base__str_to_dbt(&key, txn_name),
                                  svn_fs_base__result_dbt(&value),
                                  0);
  svn_fs_base__track_dbt(&value, pool);

  if (db_err == DB_NOTFOUND)
    return svn_fs_base__err_no_such_txn(fs, txn_name);
  SVN_ERR(BDB_WRAP(fs, N_("reading transaction"), db_err));

  /* Parse TRANSACTION skel */
  skel = svn_skel__parse(value.data, value.size, pool);
  if (! skel)
    return svn_fs_base__err_corrupt_txn(fs, txn_name);

  /* Convert skel to native type. */
  SVN_ERR(svn_fs_base__parse_transaction_skel(&transaction, skel, pool));
  *txn_p = transaction;
  return SVN_NO_ERROR;
}


svn_error_t *
svn_fs_bdb__get_txn_list(apr_array_header_t **names_p,
                         svn_fs_t *fs,
                         trail_t *trail,
                         apr_pool_t *pool)
{
  base_fs_data_t *bfd = fs->fsap_data;
  apr_size_t const next_key_key_len = strlen(NEXT_KEY_KEY);
  apr_pool_t *subpool = svn_pool_create(pool);
  apr_array_header_t *names;
  DBC *cursor;
  DBT key, value;