Fixed strange situation when we had wxPathExists and wxDirExists with the same fincti...

[wxWidgets.git] / src / gtk / app.cpp

diff --git a/src/gtk/app.cpp b/src/gtk/app.cpp
index c258135baba060452d6b2aeff385b5f25cd423f7..b894f1bb1c0cd2340195a08eec067a41614127cc 100644 (file)
--- a/src/gtk/app.cpp
+++ b/src/gtk/app.cpp
@@ -34,6 +34,7 @@
 #include "wx/filename.h"
 #include "wx/module.h"
 #include "wx/image.h"
+#include "wx/thread.h"
 
 #ifdef __WXGPE__
 #include <gpe/init.h>
@@ -79,7 +80,6 @@
 
 #include <gtk/gtk.h>
 
-
 //-----------------------------------------------------------------------------
 // global data
 //-----------------------------------------------------------------------------
@@ -97,6 +97,10 @@ extern bool g_isIdle;
 
 void wxapp_install_idle_handler();
 
+#if wxUSE_THREADS
+static wxMutex gs_idleTagsMutex;
+#endif
+
 //-----------------------------------------------------------------------------
 // wxYield
 //-----------------------------------------------------------------------------
@@ -128,14 +132,9 @@ bool wxApp::Yield(bool onlyIfNeeded)
 
     wxIsInsideYield = TRUE;
 
-    if (!g_isIdle)
-    {
-        // We need to remove idle callbacks or the loop will
-        // never finish.
-        gtk_idle_remove( m_idleTag );
-        m_idleTag = 0;
-        g_isIdle = TRUE;
-    }
+    // We need to remove idle callbacks or the loop will
+    // never finish.
+    wxTheApp->RemoveIdleTag();
 
     // disable log flushing from here because a call to wxYield() shouldn't
     // normally result in message boxes popping up &c
@@ -164,20 +163,30 @@ bool wxApp::Yield(bool onlyIfNeeded)
 // wxWakeUpIdle
 //-----------------------------------------------------------------------------
 
+// RR/KH: The wxMutexGui calls are not needed on GTK2 according to
+// the GTK faq, http://www.gtk.org/faq/#AEN500
+// The calls to gdk_threads_enter() and leave() are specifically noted
+// as not being necessary.  The MutexGui calls are still left in for GTK1.
+// Eliminating the MutexGui calls fixes the long-standing "random" lockup
+// when using wxPostEvent (which calls WakeUpIdle) from a thread.
+
 void wxApp::WakeUpIdle()
 {
+#ifndef __WXGTK20__
 #if wxUSE_THREADS
     if (!wxThread::IsMain())
         wxMutexGuiEnter();
-#endif
+#endif // wxUSE_THREADS_
+#endif // __WXGTK2__
 
-    if (g_isIdle)
-        wxapp_install_idle_handler();
+    wxapp_install_idle_handler();
 
+#ifndef __WXGTK20__
 #if wxUSE_THREADS
     if (!wxThread::IsMain())
         wxMutexGuiLeave();
-#endif
+#endif // wxUSE_THREADS_
+#endif // __WXGTK2__
 }
 
 //-----------------------------------------------------------------------------
@@ -200,7 +209,12 @@ static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
     // Sent idle event to all who request them.
     wxTheApp->ProcessPendingEvents();
 
-    g_pendingTag = 0;
+    {
+#if wxUSE_THREADS
+        wxMutexLocker lock(gs_idleTagsMutex);
+#endif
+        g_pendingTag = 0;
+    }
 
     // Flush the logged messages if any.
 #if wxUSE_LOG
@@ -248,8 +262,13 @@ static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 
     // Indicate that we are now in idle mode and event handlers
     // will have to reinstall the idle handler again.
-    g_isIdle = TRUE;
-    wxTheApp->m_idleTag = 0;
+    {
+#if wxUSE_THREADS
+        wxMutexLocker lock(gs_idleTagsMutex);
+#endif
+        g_isIdle = TRUE;
+        wxTheApp->m_idleTag = 0;
+    }
 
     // Send idle event to all who request them as long as
     // no events have popped up in the event queue.
@@ -357,6 +376,15 @@ static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
 
 void wxapp_install_idle_handler()
 {
+#if wxUSE_THREADS
+    wxMutexLocker lock(gs_idleTagsMutex);
+#endif
+
+    // Don't install the handler if it's already installed. This test *MUST*
+    // be done when gs_idleTagsMutex is locked!
+    if (!g_isIdle)
+        return;
+
     // GD: this assert is raised when using the thread sample (which works)
     //     so the test is probably not so easy. Can widget callbacks be
     //     triggered from child threads and, if so, for which widgets?
@@ -408,6 +436,7 @@ wxApp::wxApp()
 #endif // __WXDEBUG__
 
     m_idleTag = 0;
+    g_isIdle = TRUE;
     wxapp_install_idle_handler();
 
 #if wxUSE_THREADS
@@ -551,7 +580,7 @@ bool wxApp::Initialize(int& argc, wxChar **argv)
         (gtk_minor_version == 2) &&
         (gtk_micro_version < 4))
     {
-        printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
+        printf( "wxWidgets warning: GUI threading disabled due to outdated GTK version\n" );
     }
     else
     {
@@ -645,8 +674,6 @@ bool wxApp::Initialize(int& argc, wxChar **argv)
     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 #endif
 
-    wxGetRootWindow();
-
     return true;
 }
 
@@ -670,3 +697,15 @@ void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxC
 
 #endif // __WXDEBUG__
 
+void wxApp::RemoveIdleTag()
+{
+#if wxUSE_THREADS
+    wxMutexLocker lock(gs_idleTagsMutex);
+#endif
+    if (!g_isIdle)
+    {
+        gtk_idle_remove( wxTheApp->m_idleTag );
+        wxTheApp->m_idleTag = 0;
+        g_isIdle = TRUE;
+    }
+}