// This file is part of Tetcore.
// Copyright (C) 2020-2021 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
use crate;
scoped_thread_local!;
/// Provide `HostState` for the runtime method call and execute the given function `f`.
///
/// During the execution of the provided function `with_context` will be callable.
/// Create a `HostContext` from the contained `HostState` and execute the given function `f`.
///
/// This function is only callable within closure passed to `init_state`. Otherwise, the passed
/// context will be `None`.