#if !defined(HEAP_SIZE0)
// NOTE: has to be at least enough to start with no gc calls
#define HEAP_SIZE0 (usize)4*1024*1024
#endif

#if !defined(STACK_SIZE0)
#define STACK_SIZE0 (usize)4*1024
#endif

#if !defined(ALLOC_LIMIT_TRIGGER)
#define ALLOC_LIMIT_TRIGGER HEAP_SIZE0
#endif

#if !defined(MEM_CALLOC)
#define MEM_CALLOC(n, sz) calloc((usize)(n), (usize)(sz))
#define MEM_ALLOC(n) malloc((usize)(n))
#define MEM_REALLOC(p, n) realloc((p), (usize)(n))
#define MEM_FREE(x) free(x)
#define MEM_STRDUP(s) strdup(s)
#if !defined(sl_segalloc)
void *sl_segalloc(usize sz);
void sl_segfree(void *s, usize sz);
void sl_segused(void *s, usize sz, usize used) sl_nonnull(1);
#endif
#endif