X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/3340066af696862df9394469b341b700fe4e3a68..a949e8fac2666418b2a6eb15e94959563cf8aad6:/src/common/timercmn.cpp

diff --git a/src/common/timercmn.cpp b/src/common/timercmn.cpp
index 3bf88317e8..28f69dae3b 100644
--- a/src/common/timercmn.cpp
+++ b/src/common/timercmn.cpp
@@ -36,6 +36,7 @@
 #ifndef WX_PRECOMP
     #include "wx/intl.h"
     #include "wx/log.h"
+    #include "wx/thread.h"
 #endif
 
 #include "wx/timer.h"
@@ -131,6 +132,13 @@ void wxTimerBase::Notify()
 
 bool wxTimerBase::Start(int milliseconds, bool oneShot)
 {
+    // under MSW timers only work when they're started from the main thread so
+    // let the caller know about it
+#if wxUSE_THREADS
+    wxASSERT_MSG( wxThread::IsMain(),
+                  _T("timer can only be started from the main thread") );
+#endif // wxUSE_THREADS
+
     if ( IsRunning() )
     {
         // not stopping the already running timer might work for some