mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-07 07:18:03 +00:00
Bastian Köcher
b382cc8f9d
* Improve sandbox internal api This improves the internal sandbox api for the executor implementations. The main point is to hide the tls in the internal api and not having it exposed to the outside. This is especially needed for wasmtime 0.29.0 * Fmt * Make it nicer
46 lines
1.6 KiB
Rust
46 lines
1.6 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2020-2021 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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use crate::host::{HostContext, HostState};
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scoped_tls::scoped_thread_local!(static HOST_STATE: HostState);
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/// Provide `HostState` for the runtime method call and execute the given function `f`.
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///
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/// During the execution of the provided function `with_context` will be callable.
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pub fn with_initialized_state<R, F>(s: &HostState, f: F) -> R
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where
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F: FnOnce() -> R,
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{
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HOST_STATE.set(s, f)
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}
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/// Create a `HostContext` from the contained `HostState` and execute the given function `f`.
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///
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/// This function is only callable within closure passed to `init_state`. Otherwise, the passed
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/// context will be `None`.
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pub fn with_context<R, F>(f: F) -> R
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where
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F: FnOnce(Option<HostContext>) -> R,
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{
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if !HOST_STATE.is_set() {
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return f(None)
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}
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HOST_STATE.with(|state| f(Some(state.materialize())))
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}
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