New redesign of core:sync (stored under core:sync/sync2 for the time being)

core/sync/sync2/channel_unix.odin

@@ -0,0 +1,17 @@
+//+build linux, darwin, freebsd
+//+private
+package sync2
+
+import "core:time"
+
+raw_channel_wait_queue_wait_on :: proc(state: ^uintptr, timeout: time.Duration) {
+	// stub
+}
+
+raw_channel_wait_queue_signal :: proc(q: ^Raw_Channel_Wait_Queue) {
+	// stub
+}
+
+raw_channel_wait_queue_broadcast :: proc(q: ^Raw_Channel_Wait_Queue) {
+	// stub
+}