__must_check void *para_realloc(void *p, size_t size);
__must_check __malloc void *alloc(size_t size);
-__must_check __malloc void *para_calloc(size_t size);
+__must_check __malloc void *zalloc(size_t size);
__must_check __malloc char *para_strdup(const char *s);
__printf_2_0 unsigned xvasprintf(char **result, const char *fmt, va_list ap);