55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <react/renderer/consistency/ShadowTreeRevisionConsistencyManager.h>
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namespace facebook::react {
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/**
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* This is a RAII class that locks the shadow tree revisions during its
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* lifetime.
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*
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* @example
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* {
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* ScopedShadowTreeRevisionLock lock(consistencyManager);
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* runJavaScriptTask(); // During this execution, the lock will be active.
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* }
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*/
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class ScopedShadowTreeRevisionLock {
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public:
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explicit ScopedShadowTreeRevisionLock(
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ShadowTreeRevisionConsistencyManager* consistencyManager) noexcept
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: consistencyManager_(consistencyManager) {
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if (consistencyManager_ != nullptr) {
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consistencyManager_->lockRevisions();
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}
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}
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// Non-movable
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ScopedShadowTreeRevisionLock(const ScopedShadowTreeRevisionLock&) = delete;
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ScopedShadowTreeRevisionLock(ScopedShadowTreeRevisionLock&&) = delete;
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// Non-copyable
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ScopedShadowTreeRevisionLock& operator=(const ScopedShadowTreeRevisionLock&) =
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delete;
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ScopedShadowTreeRevisionLock& operator=(ScopedShadowTreeRevisionLock&&) =
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delete;
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~ScopedShadowTreeRevisionLock() noexcept {
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if (consistencyManager_ != nullptr) {
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consistencyManager_->unlockRevisions();
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}
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}
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private:
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ShadowTreeRevisionConsistencyManager* consistencyManager_;
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};
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} // namespace facebook::react
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