int gras_bench_always_begin(const char *location, int line);
int gras_bench_always_end(void);
int gras_bench_once_begin(const char *location, int line);
int gras_bench_always_begin(const char *location, int line);
int gras_bench_always_end(void);
int gras_bench_once_begin(const char *location, int line);