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/* -------------------------------------------
Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#ifndef INC_KERNEL_HEAP_H
#define INC_KERNEL_HEAP_H
/// @date 30/01/24
/// @file: Heap.h
/// @brief: heap allocation support.
#include <NewKit/KernelPanic.h>
#include <KernelKit/LPC.h>
#include <Hints/CompilerHint.h>
namespace Kernel
{
/// @brief Declare pointer as free.
/// @param heap_ptr the pointer.
/// @return a status code regarding the deallocation.
Int32 mm_delete_heap(VoidPtr heap_ptr);
/// @brief Declare a new size for heap_ptr.
/// @param heap_ptr the pointer.
/// @return unsupported always returns nullptr.
VoidPtr mm_realloc_heap(VoidPtr heap_ptr, SizeT new_sz);
/// @brief Check if pointer is a valid Kernel pointer.
/// @param heap_ptr the pointer
/// @return if it exists it returns true.
Boolean mm_is_valid_heap(VoidPtr heap_ptr);
/// @brief Allocate chunk of memory.
/// @param sz Size of pointer
/// @param wr Read Write bit.
/// @param user User enable bit.
/// @return The newly allocated pointer, or nullptr.
VoidPtr mm_new_heap(const SizeT sz, const Bool wr, const Bool user);
/// @brief Protect the heap with a CRC value.
/// @param heap_ptr pointer.
/// @return if it valid: point has crc now., otherwise fail.
Boolean mm_protect_heap(VoidPtr heap_ptr);
/// @brief Makes a Kernel page.
/// @param heap_ptr the page pointer.
/// @return status code
Int32 mm_make_page(VoidPtr heap_ptr);
/// @brief Overwrites and set the flags of a heap header.
/// @param heap_ptr the pointer to update.
/// @param flags the flags to set.
Int32 mm_make_flags(VoidPtr heap_ptr, UInt64 flags);
/// @brief Gets the flags of a heap header.
/// @param heap_ptr the pointer to get.
UInt64 mm_get_flags(VoidPtr heap_ptr);
/// @brief Allocate C++ class.
/// @param cls The class to allocate.
/// @param args The args to pass.
template <typename T, typename... Args>
inline Void mm_new_class(_Input _Output T** cls, _Input Args&&... args)
{
if (*cls)
{
err_global_get() = Kernel::kErrorInvalidData;
return;
}
*cls = new T(move(args)...);
}
/// @brief Delete and nullify C++ class.
/// @param cls The class to delete.
template <typename T>
inline Void mm_delete_class(_Input _Output T** cls)
{
delete *cls;
*cls = nullptr;
}
} // namespace Kernel
#endif // !INC_KERNEL_HEAP_H
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