Move library tree where it belongs

lib-src/lib-widget-extra/NonGuiThread.cpp

@@ -0,0 +1,84 @@
+/*************************************************************************
+
+  NonGuiThread.cpp
+
+  James Crook
+  (C) Audacity Developers, 2007
+
+  wxWidgets license. See Licensing.txt
+
+**********************************************************************//**
+
+\class NonGuiThread
+\brief NonGuiThread a thread class that allows non-GUI activities to
+take place in the background without killing the GUI.
+
+*//**********************************************************************/
+
+#include <wx/wx.h>
+#include <wx/apptrait.h>
+#include "NonGuiThread.h"
+
+bool NonGuiThread::IsLive=false;
+
+NonGuiThread::NonGuiThread(tGenericFn pFn)
+{
+   mpFn = pFn;
+   IsLive=true;
+   mbExit = false;
+}
+
+NonGuiThread::~NonGuiThread()
+{
+   IsLive=false;
+}
+
+NonGuiThread::ExitCode NonGuiThread::Entry()
+{
+   // The while isn't needed here, but may be later if we break the function
+   // up...
+   while( !TestDestroy() && !mbExit  )
+   {
+      mbExit=true;
+      (*mpFn)();
+   }
+   return (ExitCode)0;
+}
+
+// This one runs the function and only returns when function
+// has run to completion.
+void NonGuiThread::RunInThread(tGenericFn pFn)
+{
+   #ifdef WXMSW
+   wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
+   wxASSERT( traits );//"no wxAppTraits in RunInThread()?"
+
+   void *cookie = NULL;
+   // disable all app windows while waiting for the child process to finish
+   cookie = traits->BeforeChildWaitLoop();
+   #endif
+
+   NonGuiThread * mpThread = new NonGuiThread(pFn);
+   mpThread->Create();
+   mpThread->Resume();
+   wxLogDebug(wxT("Into the thread..."));
+   while( mpThread->IsLive )
+   {
+      wxMilliSleep( 100 );
+      //traits->AlwaysYield();
+      wxYield();
+   }
+   #ifdef WXMSW
+   traits->AfterChildWaitLoop(cookie);
+   #endif
+}
+
+// This function starts the thread and returns immediately.
+NonGuiThread * NonGuiThread::StartChild( tGenericFn pFn )
+{
+   NonGuiThread * pThread = new NonGuiThread(pFn);
+   //pThread->mpFn = pFn;
+   pThread->Create();
+   pThread->Run();
+   return pThread;
+}