use stduse threaduse testr const Nproduced = 100 const main = {	testr.run([		[.name="simple-singlethreaded", .fn=simple],		[.name="slow-producer", .fn={ctx; producerconsumer(ctx, 100, 100)}],		[.name="fast-producer", .fn={ctx; producerconsumer(ctx, 10_000, 0)}],	][:])} const simple = {ctx	var q		/* simple test */	thread.qinit(&q)	thread.qput(&q, 123)	thread.qput(&q, 246) 	testr.check(ctx, thread.qget(&q) == 123, "expected 123")	testr.check(ctx, thread.qget(&q) == 246, "expected 246")} const producerconsumer = {ctx, count, delay	var qp 	qp = std.alloc()	thread.qinit(qp)	thread.spawn({; producer(qp, count, delay)}) 	for var i = 0; i < count; i++		testr.check(ctx, thread.qget(qp) == i, "expected {}\n", i)	;;} const producer = {qp, count, delay	for var i = 0; i < count; i++		thread.qput(qp, i)		if delay > 0			std.usleep(delay)		;;	;;}