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heap-state.h
// Copyright 2021 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 INCLUDE_CPPGC_HEAP_STATE_H_ #define INCLUDE_CPPGC_HEAP_STATE_H_ #include "v8config.h" // NOLINT(build/include_directory) namespace cppgc { class HeapHandle; namespace subtle { /** * Helpers to peek into heap-internal state. */ class V8_EXPORT HeapState final { public: /** * Returns whether the garbage collector is marking. This API is experimental * and is expected to be removed in future. * * \param heap_handle The corresponding heap. * \returns true if the garbage collector is currently marking, and false * otherwise. */ static bool IsMarking(const HeapHandle& heap_handle); /* * Returns whether the garbage collector is sweeping. This API is experimental * and is expected to be removed in future. * * \param heap_handle The corresponding heap. * \returns true if the garbage collector is currently sweeping, and false * otherwise. */ static bool IsSweeping(const HeapHandle& heap_handle); /* * Returns whether the garbage collector is currently sweeping on the thread * owning this heap. This API allows the caller to determine whether it has * been called from a destructor of a managed object. This API is experimental * and may be removed in future. * * \param heap_handle The corresponding heap. * \returns true if the garbage collector is currently sweeping on this * thread, and false otherwise. */ static bool IsSweepingOnOwningThread(const HeapHandle& heap_handle); /** * Returns whether the garbage collector is in the atomic pause, i.e., the * mutator is stopped from running. This API is experimental and is expected * to be removed in future. * * \param heap_handle The corresponding heap. * \returns true if the garbage collector is currently in the atomic pause, * and false otherwise. */ static bool IsInAtomicPause(const HeapHandle& heap_handle); /** * Returns whether the last garbage collection was finalized conservatively * (i.e., with a non-empty stack). This API is experimental and is expected to * be removed in future. * * \param heap_handle The corresponding heap. * \returns true if the last garbage collection was finalized conservatively, * and false otherwise. */ static bool PreviousGCWasConservative(const HeapHandle& heap_handle); private: HeapState() = delete; }; } // namespace subtle } // namespace cppgc #endif // INCLUDE_CPPGC_HEAP_STATE_H_