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deps/v8/src/heap/cppgc/task-handle.h
53 строки
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Michaël Zasso
deps: update V8 to 12.8.374.13
16 авг 2024, 17:03
Не верифицирован
16 авг 2024, 17:03
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// Copyright 2020 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef V8_HEAP_CPPGC_TASK_HANDLE_H_ #define V8_HEAP_CPPGC_TASK_HANDLE_H_ #include <memory> #include "src/base/logging.h" namespace cppgc { namespace internal { // A handle that is used for cancelling individual tasks. struct SingleThreadedHandle { struct NonEmptyTag {}; // Default construction results in empty handle. SingleThreadedHandle() = default; explicit SingleThreadedHandle(NonEmptyTag) : is_cancelled_(std::make_shared<bool>(false)) {} void Cancel() { DCHECK(is_cancelled_); *is_cancelled_ = true; } void CancelIfNonEmpty() { if (is_cancelled_) { *is_cancelled_ = true; } } bool IsCanceled() const { DCHECK(is_cancelled_); return *is_cancelled_; } // A handle is active if it is non-empty and not cancelled. explicit operator bool() const { return is_cancelled_.get() && !*is_cancelled_.get(); } private: std::shared_ptr<bool> is_cancelled_; }; } // namespace internal } // namespace cppgc #endif // V8_HEAP_CPPGC_TASK_HANDLE_H_