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heap-state.h2.6 KB · 83 lines
// 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_