From 80404cc928c758f7063da42a0d68669998613969 Mon Sep 17 00:00:00 2001
From: xdBronch <51252236+xdBronch@users.noreply.github.com>
Date: Tue, 4 Jul 2023 01:00:37 -0400
Subject: [PATCH] implement std.time.sleep for uefi

---
 lib/std/time.zig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/std/time.zig b/lib/std/time.zig
index a60a0ef959..c078e97793 100644
--- a/lib/std/time.zig
+++ b/lib/std/time.zig
@@ -46,6 +46,14 @@ pub fn sleep(nanoseconds: u64) void {
         return;
     }
 
+    if (builtin.os.tag == .uefi) {
+        const boot_services = os.uefi.system_table.boot_services.?;
+        const us_from_ns = nanoseconds / ns_per_us;
+        const us = math.cast(usize, us_from_ns) orelse math.maxInt(usize);
+        _ = boot_services.stall(us);
+        return;
+    }
+
     const s = nanoseconds / ns_per_s;
     const ns = nanoseconds % ns_per_s;
     std.os.nanosleep(s, ns);