Initial project import

tools/v/vlib/sync/channel_4_test.v

@@ -0,0 +1,32 @@
+fn do_rec(ch chan int, resch chan i64) {
+	mut sum := i64(0)
+	for _ in 0 .. 2000 {
+		sum += <-ch
+	}
+	println(sum)
+	resch <- sum
+}
+
+fn do_send(ch chan int) {
+	for i in 0 .. 2000 {
+		ch <- i
+	}
+}
+
+fn test_channel_multi_buffered() {
+	ch := chan int{cap: 100}
+	resch := chan i64{}
+	spawn do_rec(ch, resch)
+	spawn do_rec(ch, resch)
+	spawn do_rec(ch, resch)
+	spawn do_rec(ch, resch)
+	spawn do_send(ch)
+	spawn do_send(ch)
+	spawn do_send(ch)
+	spawn do_send(ch)
+	mut sum := i64(0)
+	for _ in 0 .. 4 {
+		sum += <-resch
+	}
+	assert sum == i64(4) * 2000 * (2000 - 1) / 2
+}