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#ifndef _mem_h
#define _mem_h
#include <stddef.h>
#include "val.h"
#include "vm.h"
#include "state.h"
void *M(State *S, void *ptr, size_t old, size_t new);
#define NEW(S,ty) (ty*)M(S, NULL, 0, sizeof(ty))
#define NEW_ARR(S,ty,n) (ty*)M(S, NULL, 0, (n)*sizeof(ty))
#define RENEW_ARR(S,p,ty,old,new) (ty*)M(S, (p), (old)*sizeof(ty), (new)*sizeof(ty))
#define NEW_OBJ(S,ty, oty) (ty*)alloc_obj(S, sizeof(ty), oty)
// needs len,cap,d fields
#define ENSURE_CAP(S, darr, type, needed) \
do { if (darr.cap < needed) { \
size_t __newsz = next_pwrof2(needed); \
if (__newsz < 8) __newsz = 8; \
darr.d = RENEW_ARR(S, darr.d, type, darr.cap, __newsz); \
darr.cap = __newsz; \
} } while (0)
size_t next_pwrof2(size_t x);
#define FREE(S,p,ty) M(S, p, sizeof(ty), 0)
#define FREE_ARR(S,p,ty,old) M(S, p, (old)*sizeof(ty), 0)
Obj *alloc_obj(State *S, size_t sz, ObjTy oty);
#endif
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