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Name	Size	Permission	Date
api-constants.h	2.83 KB	-rw-r--r--	2024-04-10 12:29
atomic-entry-flag.h	1.72 KB	-rw-r--r--	2022-10-11 10:59
base-page-handle.h	1.44 KB	-rw-r--r--	2024-04-10 12:29
caged-heap-local-data.h	3.61 KB	-rw-r--r--	2024-04-10 12:29
caged-heap.h	2.21 KB	-rw-r--r--	2024-04-10 12:29
compiler-specific.h	1019 B	-rw-r--r--	2022-10-11 10:59
finalizer-trait.h	2.59 KB	-rw-r--r--	2022-10-11 10:59
gc-info.h	6.31 KB	-rw-r--r--	2024-04-10 12:29
logging.h	1.66 KB	-rw-r--r--	2022-10-11 10:59
member-storage.h	8.7 KB	-rw-r--r--	2024-04-10 12:29
name-trait.h	4.08 KB	-rw-r--r--	2024-04-10 12:29
persistent-node.h	5.89 KB	-rw-r--r--	2024-04-10 12:29
pointer-policies.h	8.34 KB	-rw-r--r--	2024-04-10 12:29
write-barrier.h	19.09 KB	-rw-r--r--	2024-04-10 12:29

Rename

// 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 INCLUDE_CPPGC_INTERNAL_CAGED_HEAP_H_
#define INCLUDE_CPPGC_INTERNAL_CAGED_HEAP_H_

#include <climits>
#include <cstddef>

#include "cppgc/internal/api-constants.h"
#include "cppgc/internal/base-page-handle.h"
#include "v8config.h"  // NOLINT(build/include_directory)

#if defined(CPPGC_CAGED_HEAP)

namespace cppgc {
namespace internal {

class V8_EXPORT CagedHeapBase {
 public:
  V8_INLINE static uintptr_t OffsetFromAddress(const void* address) {
    return reinterpret_cast<uintptr_t>(address) &
           (api_constants::kCagedHeapReservationAlignment - 1);
  }

V8_INLINE static bool IsWithinCage(const void* address) {
    CPPGC_DCHECK(g_heap_base_);
    return (reinterpret_cast<uintptr_t>(address) &
            ~(api_constants::kCagedHeapReservationAlignment - 1)) ==
           g_heap_base_;
  }

V8_INLINE static bool AreWithinCage(const void* addr1, const void* addr2) {
#if defined(CPPGC_2GB_CAGE)
    static constexpr size_t kHeapBaseShift = sizeof(uint32_t) * CHAR_BIT - 1;
#else   //! defined(CPPGC_2GB_CAGE)
#if defined(CPPGC_POINTER_COMPRESSION)
    static constexpr size_t kHeapBaseShift =
        31 + api_constants::kPointerCompressionShift;
#else   // !defined(CPPGC_POINTER_COMPRESSION)
    static constexpr size_t kHeapBaseShift = sizeof(uint32_t) * CHAR_BIT;
#endif  // !defined(CPPGC_POINTER_COMPRESSION)
#endif  //! defined(CPPGC_2GB_CAGE)
    static_assert((static_cast<size_t>(1) << kHeapBaseShift) ==
                  api_constants::kCagedHeapMaxReservationSize);
    CPPGC_DCHECK(g_heap_base_);
    return !(((reinterpret_cast<uintptr_t>(addr1) ^ g_heap_base_) |
              (reinterpret_cast<uintptr_t>(addr2) ^ g_heap_base_)) >>
             kHeapBaseShift);
  }

V8_INLINE static uintptr_t GetBase() { return g_heap_base_; }
  V8_INLINE static size_t GetAgeTableSize() { return g_age_table_size_; }

private:
  friend class CagedHeap;

static uintptr_t g_heap_base_;
  static size_t g_age_table_size_;
};

}  // namespace internal
}  // namespace cppgc

#endif  // defined(CPPGC_CAGED_HEAP)

#endif  // INCLUDE_CPPGC_INTERNAL_CAGED_HEAP_H_