#ifndef SRC_NODE_MEM_H_
#define SRC_NODE_MEM_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include <cstddef>

namespace node {
namespace mem {

// nghttp2 allows custom allocators that
// follow exactly the same structure and behavior, but
// use different struct names. To allow for code re-use,
// the NgLibMemoryManager template class can be used for both.

struct NgLibMemoryManagerBase {
 virtual void StopTrackingMemory(void* ptr) = 0;
};

template <typename Class, typename AllocatorStructName>
class NgLibMemoryManager : public NgLibMemoryManagerBase {
 public:
 // Class needs to provide these methods:
 // void CheckAllocatedSize(size_t previous_size) const;
 // void IncreaseAllocatedSize(size_t size);
 // void DecreaseAllocatedSize(size_t size);
 // Environment* env() const;

 AllocatorStructName MakeAllocator();

 void StopTrackingMemory(void* ptr) override;

 private:
 static void* ReallocImpl(void* ptr, size_t size, void* user_data);
 static void* MallocImpl(size_t size, void* user_data);
 static void FreeImpl(void* ptr, void* user_data);
 static void* CallocImpl(size_t nmemb, size_t size, void* user_data);
};

} // namespace mem
} // namespace node

#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif // SRC_NODE_MEM_H_