clox/memory.h

//
// Created by 李晓明 on 2023/8/16.
//

#ifndef CLOX_MEMORY_H
#define CLOX_MEMORY_H

#include "common.h"

#define GROW_CAPACITY(capacity) \
  ((capacity) < 8 ? 8 : (capacity) *2)

#define GROW_ARRAY(type, pointer, oldCount, newCount) \
  (type *) reallocate(pointer, sizeof(type) * (oldCount), sizeof(type) * (newCount))

#define FREE_ARRAY(type, pointer, oldCount) \
  reallocate(pointer, sizeof(type) * (oldCount), 0)

//    oldSize	 newSize	               Operation
//    0	        Non‑zero	            Allocate new block.
//    Non‑zero	0	                    Free allocation.
//    Non‑zero	Smaller than oldSize	Shrink existing allocation.
//    Non‑zero	Larger than oldSize	    Grow existing allocation.
void *reallocate(void *pointer, size_t oldSize, size_t newSize);
#endif//CLOX_MEMORY_H