From 8df850023c78d7ca0d3c0e8070cfdb56878a7da5 Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Mon, 4 Mar 2019 10:16:51 +1100
Subject: [PATCH] [c-host] fix deadlock when there is no update

---
 c-host/app.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/c-host/app.c b/c-host/app.c
index 359e0a39..fcee9205 100644
--- a/c-host/app.c
+++ b/c-host/app.c
@@ -71,8 +71,8 @@ static int pointerThread(void * opaque)
     pointer->data = app.pointerData;
     if (!app.iface->getPointer(&pointer))
       DEBUG_ERROR("Failed to get the pointer");
-    os_signalEvent(app.updateEvent);
 #endif
+    os_signalEvent(app.updateEvent);
   }
 
   DEBUG_INFO("Cursor thread stopped");
@@ -303,6 +303,7 @@ int app_main()
     bool frameUpdate   = false;
     bool pointerUpdate = false;
 
+retry_capture:
     switch(iface->capture(&frameUpdate, &pointerUpdate))
     {
       case CAPTURE_RESULT_OK:
@@ -342,6 +343,9 @@ int app_main()
         goto finish;
     }
 
+    if (!frameUpdate && !pointerUpdate)
+      goto retry_capture;
+
     if (frameUpdate && !os_signalEvent(app.frameEvent))
     {
       DEBUG_ERROR("Failed to signal the frame thread");