From 81941f91611adb33796b846f492f1073b4ab9d31 Mon Sep 17 00:00:00 2001
From: Andrea Orru <andrea@orru.io>
Date: Fri, 16 Mar 2018 01:41:45 -0700
Subject: [PATCH] Add Thread option for Mailboxes

---
 std/os/zen.zig | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/std/os/zen.zig b/std/os/zen.zig
index 37c674c9e1..814ec36884 100644
--- a/std/os/zen.zig
+++ b/std/os/zen.zig
@@ -28,7 +28,7 @@ pub const MailboxId = union(enum) {
     This,
     Kernel,
     Port:   u16,
-    //Thread: u16,
+    Thread: u16,
 };
 
 
@@ -96,8 +96,11 @@ pub fn exit(status: i32) noreturn {
     unreachable;
 }
 
-pub fn createPort(id: u16) void {
-    _ = syscall1(Syscall.createPort, id);
+pub fn createPort(mailbox_id: &const MailboxId) void {
+    _ = switch (*mailbox_id) {
+        MailboxId.Port => |id| syscall1(Syscall.createPort, id),
+        else => unreachable,
+    };
 }
 
 pub fn send(message: &const Message) void {