From 340629a5c0a53746ff37a5cf8edf898fdbb275dc Mon Sep 17 00:00:00 2001
From: Joel Dice <joel.dice@fermyon.com>
Date: Tue, 19 Nov 2024 06:02:53 -0700
Subject: [PATCH] [WASI] throw PNSE in `ManualResetEventSlim.Wait` (#109839)

Signed-off-by: Joel Dice <joel.dice@fermyon.com>
Co-authored-by: pavelsavara <pavel.savara@gmail.com>
---
 .../src/System/Threading/ManualResetEventSlim.cs               | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libraries/System.Private.CoreLib/src/System/Threading/ManualResetEventSlim.cs b/src/libraries/System.Private.CoreLib/src/System/Threading/ManualResetEventSlim.cs
index a9b8c10c03318..41330649af163 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Threading/ManualResetEventSlim.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Threading/ManualResetEventSlim.cs
@@ -489,6 +489,9 @@ public bool Wait(int millisecondsTimeout, CancellationToken cancellationToken)
 
             ArgumentOutOfRangeException.ThrowIfLessThan(millisecondsTimeout, -1);
 
+#if TARGET_WASI
+            if (OperatingSystem.IsWasi()) throw new PlatformNotSupportedException(); // TODO remove with https://github.com/dotnet/runtime/pull/107185
+#endif
 #if FEATURE_WASM_MANAGED_THREADS
             Thread.AssureBlockingPossible();
 #endif