Where Online Learning is simpler!

The C and C++ Include Header Files

/usr/include/node/cppgc/internal/base-page-handle.h


$ cat -n /usr/include/node/cppgc/internal/base-page-handle.h

     1	// Copyright 2022 the V8 project authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style license that can be
     3	// found in the LICENSE file.
     4	
     5	#ifndef INCLUDE_CPPGC_INTERNAL_BASE_PAGE_HANDLE_H_
     6	#define INCLUDE_CPPGC_INTERNAL_BASE_PAGE_HANDLE_H_
     7	
     8	#include "cppgc/heap-handle.h"
     9	#include "cppgc/internal/api-constants.h"
    10	#include "cppgc/internal/logging.h"
    11	#include "v8config.h"  // NOLINT(build/include_directory)
    12	
    13	namespace cppgc {
    14	namespace internal {
    15	
    16	// The class is needed in the header to allow for fast access to HeapHandle in
    17	// the write barrier.
    18	class BasePageHandle {
    19	 public:
    20	  static V8_INLINE BasePageHandle* FromPayload(void* payload) {
    21	    return reinterpret_cast<BasePageHandle*>(
    22	        (reinterpret_cast<uintptr_t>(payload) &
    23	         ~(api_constants::kPageSize - 1)) +
    24	        api_constants::kGuardPageSize);
    25	  }
    26	  static V8_INLINE const BasePageHandle* FromPayload(const void* payload) {
    27	    return FromPayload(const_cast<void*>(payload));
    28	  }
    29	
    30	  HeapHandle& heap_handle() { return heap_handle_; }
    31	  const HeapHandle& heap_handle() const { return heap_handle_; }
    32	
    33	 protected:
    34	  explicit BasePageHandle(HeapHandle& heap_handle) : heap_handle_(heap_handle) {
    35	    CPPGC_DCHECK(reinterpret_cast<uintptr_t>(this) % api_constants::kPageSize ==
    36	                 api_constants::kGuardPageSize);
    37	  }
    38	
    39	  HeapHandle& heap_handle_;
    40	};
    41	
    42	}  // namespace internal
    43	}  // namespace cppgc
    44	
    45	#endif  // INCLUDE_CPPGC_INTERNAL_BASE_PAGE_HANDLE_H_