#define named(name) goto name; name##_break: if (0) name:
	#define break(name) goto name##_break;

	/* Which then allows you to write... */

	named (LOOPS) for (i=1; i<10; i++) {
	                for (j=1; j<10; j++) {
	                  for (j=1; j<10; j++) {
		                /* Process data[i][j][k] here */
	                    if (data[i][j][k] < threshold) break(LOOPS);
	                  }
	                }
	              }