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// Copyright 2011 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_HANDLES_LOCAL_HANDLES_H_
#define V8_HANDLES_LOCAL_HANDLES_H_
#include "include/v8-internal.h"
#include "src/base/functional.h"
#include "src/base/macros.h"
#include "src/handles/handles.h"
#include "src/heap/local-heap.h"
namespace v8 {
namespace internal {
class RootVisitor;
class LocalHandles {
public:
LocalHandles();
~LocalHandles();
void Iterate(RootVisitor* visitor);
#ifdef DEBUG
bool Contains(Address* location);
#endif
private:
HandleScopeData scope_;
std::vector<Address*> blocks_;
V8_EXPORT_PRIVATE Address* AddBlock();
V8_EXPORT_PRIVATE void RemoveUnusedBlocks();
#ifdef ENABLE_HANDLE_ZAPPING
V8_EXPORT_PRIVATE static void ZapRange(Address* start, Address* end);
#endif
friend class LocalHandleScope;
};
class V8_NODISCARD LocalHandleScope {
public:
explicit inline LocalHandleScope(LocalIsolate* local_isolate);
explicit inline LocalHandleScope(LocalHeap* local_heap);
inline ~LocalHandleScope();
LocalHandleScope(const LocalHandleScope&) = delete;
LocalHandleScope& operator=(const LocalHandleScope&) = delete;
template <typename T>
Handle<T> CloseAndEscape(Handle<T> handle_value);
V8_INLINE static Address* GetHandle(LocalHeap* local_heap, Address value);
private:
// Prevent heap allocation or illegal handle scopes.
void* operator new(size_t size) = delete;
void operator delete(void* size_t) = delete;
// Close the handle scope resetting limits to a previous state.
static inline void CloseScope(LocalHeap* local_heap, Address* prev_next,
Address* prev_limit);
V8_EXPORT_PRIVATE static void CloseMainThreadScope(LocalHeap* local_heap,
Address* prev_next,
Address* prev_limit);
V8_EXPORT_PRIVATE void OpenMainThreadScope(LocalHeap* local_heap);
V8_EXPORT_PRIVATE static Address* GetMainThreadHandle(LocalHeap* local_heap,
Address value);
LocalHeap* local_heap_;
Address* prev_limit_;
Address* prev_next_;
};
} // namespace internal
} // namespace v8
#endif // V8_HANDLES_LOCAL_HANDLES_H_
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