From 53d88c1c964cf3102fcd36137984589818c01998 Mon Sep 17 00:00:00 2001
From: akallabeth <akallabeth@posteo.net>
Date: Mon, 12 Feb 2024 13:32:28 +0100
Subject: [PATCH] [server,sample] delay
 WTSVirtualChannelManagerCheckFileDescriptor

Only call WTSVirtualChannelManagerCheckFileDescriptor if there was a
event pending on WTSVirtualChannelManagerGetEventHandle
This ensures that the drdynvc channel is not opened before it is
initialized.
---
 server/Sample/sfreerdp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/server/Sample/sfreerdp.c b/server/Sample/sfreerdp.c
index e56c7b19d..ffe0701ac 100644
--- a/server/Sample/sfreerdp.c
+++ b/server/Sample/sfreerdp.c
@@ -1159,7 +1159,9 @@ static DWORD WINAPI test_peer_mainloop(LPVOID arg)
 
 			count += tmp;
 		}
-		handles[count++] = WTSVirtualChannelManagerGetEventHandle(context->vcm);
+
+		HANDLE channelHandle = WTSVirtualChannelManagerGetEventHandle(context->vcm);
+		handles[count++] = channelHandle;
 		status = WaitForMultipleObjects(count, handles, FALSE, INFINITE);
 
 		if (status == WAIT_FAILED)
@@ -1172,6 +1174,9 @@ static DWORD WINAPI test_peer_mainloop(LPVOID arg)
 		if (client->CheckFileDescriptor(client) != TRUE)
 			break;
 
+		if (WaitForSingleObject(channelHandle, 0) != WAIT_OBJECT_0)
+			continue;
+
 		if (WTSVirtualChannelManagerCheckFileDescriptor(context->vcm) != TRUE)
 			break;