uCBQN/src/mm_buddy.c
2021-04-14 19:11:19 +03:00

43 lines
831 B
C

#include "h.h"
#include "gc.c"
#include <sys/mman.h>
#ifndef MAP_NORESERVE
#define MAP_NORESERVE 0 // apparently needed for freebsd or something
#endif
typedef struct EmptyValue EmptyValue;
struct EmptyValue { // needs set: mmInfo; type=t_empty; next; everything else can be garbage
struct Value;
EmptyValue* next;
};
#define BSZ(X) (1ull<<(X))
#define BSZI(X) (64-__builtin_clzl((X)-1ull))
#define MMI(X) X
#define BN(X) mm_##X
#include "mm_buddyTemplate.c"
#ifdef OBJ_COUNTER
u64 currObjCounter;
#endif
void* mm_allocN(usz sz, u8 type) {
assert(sz>8);
onAlloc(sz, type);
Value* r = mm_allocL(BSZI(sz), type);
#ifdef OBJ_COUNTER
r->uid = currObjCounter++;
#endif
return r;
}
u64 mm_round(usz sz) {
return BSZ(BSZI(sz));
}
u64 mm_size(Value* x) {
return BSZ(x->mmInfo&63);
}
#undef BSZ
#undef BSZI