#define model_dprintf(fd, fmt, ...) do { switch_alloc = 1; dprintf(fd, fmt, ## __VA_ARGS__); switch_alloc = 0; } while (0)
#define model_print(fmt, ...) do { model_dprintf(model_out, fmt, ## __VA_ARGS__); } while (0)
#define model_dprintf(fd, fmt, ...) do { switch_alloc = 1; dprintf(fd, fmt, ## __VA_ARGS__); switch_alloc = 0; } while (0)
#define model_print(fmt, ...) do { model_dprintf(model_out, fmt, ## __VA_ARGS__); } while (0)