platform.h

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// 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 V8_HEAP_CPPGC_PLATFORM_H_
#define V8_HEAP_CPPGC_PLATFORM_H_
 
#include <string>
 
#include "include/cppgc/platform.h"
#include "include/cppgc/source-location.h"
#include "src/base/macros.h"
 
namespace cppgc::internal {
 
class HeapBase;
 
class V8_EXPORT_PRIVATE FatalOutOfMemoryHandler final {
 public:
  using Callback = void(const std::string&, const SourceLocation&, HeapBase*);
 
  FatalOutOfMemoryHandler() = default;
  explicit FatalOutOfMemoryHandler(HeapBase* heap) : heap_(heap) {}
 
  [[noreturn]] void operator()(
      const std::string& reason = std::string(),
      const SourceLocation& = SourceLocation::Current()) const;
 
  void SetCustomHandler(Callback*);
 
  // Disallow copy/move.
  FatalOutOfMemoryHandler(const FatalOutOfMemoryHandler&) = delete;
  FatalOutOfMemoryHandler& operator=(const FatalOutOfMemoryHandler&) = delete;
 
 private:
  HeapBase* heap_ = nullptr;
  Callback* custom_handler_ = nullptr;
};
 
// Gets the global OOM handler that is not bound to any specific Heap instance.
FatalOutOfMemoryHandler& GetGlobalOOMHandler();
 
// Gets the gobal PageAllocator that is not bound to any specific Heap instance.
PageAllocator& GetGlobalPageAllocator();
 
}  // namespace cppgc::internal
 
#endif  // V8_HEAP_CPPGC_PLATFORM_H_