pokediamond/arm9/lib/include/OS_alloc.h

#ifndef POKEDIAMOND_OS_ALLOC_H
#define POKEDIAMOND_OS_ALLOC_H

#include "nitro/types.h"
#include "OS_arena.h"

typedef int OSHeapHandle;

typedef struct Cell Cell;

struct Cell {
    Cell* prev;
    Cell* next;
    long size;
};

typedef struct {
    long size;
    Cell *free;
    Cell *allocated;
} HeapDesc;

typedef struct {
    volatile OSHeapHandle currentHeap;
    int numHeaps;
    void* arenaStart;
    void* arenaEnd;
    HeapDesc* heapArray;
} OSHeapInfo;

Cell* DLAddFront(Cell* list, Cell* cell);
Cell* DLExtract(Cell* list, Cell* cell);
Cell *DLInsert(Cell *original, Cell *inserted);
void* OS_AllocFromHeap(OSArenaId id, OSHeapHandle heap, u32 size);
void OS_FreeToHeap(OSArenaId id, OSHeapHandle heap, void *ptr);

#endif //POKEDIAMOND_OS_ALLOC_H