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// Copyright 2022 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_MEMBER_STORAGE_H_
#define V8_HEAP_CPPGC_MEMBER_STORAGE_H_
#include "include/cppgc/internal/member-storage.h"
namespace cppgc {
namespace internal {
#if defined(CPPGC_POINTER_COMPRESSION)
class CageBaseGlobalUpdater final {
public:
CageBaseGlobalUpdater() = delete;
static void UpdateCageBase(uintptr_t cage_base) {
CPPGC_DCHECK(CageBaseGlobal::IsBaseConsistent());
CPPGC_DCHECK(0u == (cage_base & CageBaseGlobal::kLowerHalfWordMask));
CageBaseGlobal::g_base_ = cage_base | CageBaseGlobal::kLowerHalfWordMask;
}
static uintptr_t GetCageBase() {
CPPGC_DCHECK(CageBaseGlobal::IsBaseConsistent());
return CageBaseGlobal::g_base_ & ~CageBaseGlobal::kLowerHalfWordMask;
}
};
#endif // defined(CPPGC_POINTER_COMPRESSION)
} // namespace internal
} // namespace cppgc
#endif // V8_HEAP_CPPGC_MEMBER_STORAGE_H_
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