Ichthyostega
7655960b23
== possible Scenario == 1. Gui: sigTerm invoked 2. last Subsystem -> cleans all remaining Subsy entries 3. main-Thread wakens 4. leaves main() und undloads the GUI plug-in 5. which destroys the `DependencyFactory<LocationQuery>` placed in static memory 6. the Gui-Thread returns from sigTerm() and invokes `~UiManager()` 7. which indirectly deregisters through `InteractionDirector` the `LocationQuery` Service 8. `DependInject::Service::shutdown()` grabs the Lock ==> **BOOM** == Solution == Ensure all dtors of the UI backbone are invoked ''prior'' to calling sigTerm()
255 lines
12 KiB
C++
255 lines
12 KiB
C++
/*
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GtkLumiera - entry point for the lumiera GUI loaded as shared module
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Copyright (C) Lumiera.org
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2007-2008, Joel Holdsworth <joel@airwebreathe.org.uk>
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2009, Hermann Vosseler <Ichthyostega@web.de>
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Christian Thaeter <ct@pipapo.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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/** @file gtk-lumiera.cpp
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** Start up the Lumiera GTK GUI when loading it as dynamic module.
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** This plugin is linked together with the Lumiera GUI code; when loaded as
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** Lumiera plugin, it allows to kick off the GTK main event loop and thus to bring
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** up the GUI. The loading and shutdown process is carried out by gui::GuiFacade and
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** controlled by lumiera::AppState, which in turn is activated by Lumiera main().
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**
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** After successfully loading this module, a call to GuiFacade::launchUI is expected to
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** happen, passing a termination signal (callback) to be executed when the GUI terminates.
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** The implementation of GuiFacade in the GuiRunner in fact issues this call from the ctor
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** body, while the interface is opened via an InstanceHandle member. The `launchUI()` call
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** starts a new thread, which then becomes the UI event thread and remains blocked within
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** the main GTK event loop. Before entering this loop, the CoreService of the GUI and
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** especially the [UI-Bus](\ref ui-bus.hpp) is started see \ref GtkLumiera::run().
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** This entails also to open the primary "business" interface(s) of the GUI
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** (currently as of 1/16 this is the interface gui::GuiNotification.)
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**
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** @see lumiera::AppState
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** @see gui::GuiFacade
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** @see guifacade.cpp
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** @see ui-manager.hpp
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*/
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#include "gui/gtk-base.hpp"
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#include "lib/error.hpp"
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#include "gui/ui-bus.hpp"
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#include "gui/guifacade.hpp"
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#include "gui/ctrl/ui-manager.hpp"
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#include "backend/thread-wrapper.hpp"
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#include "common/subsys.hpp"
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#include "lib/nocopy.hpp"
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extern "C" {
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#include "common/interface.h"
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#include "common/interface-descriptor.h"
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}
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#include <string>
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using backend::Thread;
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using lumiera::Subsys;
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using lumiera::error::LUMIERA_ERROR_STATE;
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using gui::LUMIERA_INTERFACE_INAME(lumieraorg_Gui, 1);
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using std::string;
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namespace gui {
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namespace { // implementation details
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using ctrl::UiManager;
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/**************************************************************************//**
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* Implement the necessary steps for actually making the Lumiera Gui available.
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* Establish the UI backbone services and start up the GTK GUI main event loop.
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* @warning to ensure reliable invocation of the termination signal,
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* any members should be failsafe on initialisation
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*/
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class GtkLumiera
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: util::NonCopyable
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{
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UiBus uiBus_;
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UiManager uiManager_;
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public:
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GtkLumiera ()
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: uiBus_{}
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, uiManager_{uiBus_}
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{ }
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string
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run()
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{
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string errorMsgBuff;
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try
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{
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// execute the GTK Event Loop____________
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uiManager_.createApplicationWindow();
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uiManager_.performMainLoop();
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} // all went well, regular shutdown
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catch (lumiera::Error& problem)
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{
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errorMsgBuff = problem.what();
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lumiera_error(); // clear error flag
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}
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catch (...)
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{
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errorMsgBuff = "unexpected error terminated the GUI.";
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}
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if (lumiera_error_peek())
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errorMsgBuff = string{lumiera_error()};
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return errorMsgBuff;
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}
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};
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void
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runGUI (Subsys::SigTerm reportOnTermination)
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{
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string shutdownLog = GtkLumiera{}.run();
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// inform main thread that the GUI has been shut down...
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reportOnTermination (&shutdownLog);
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}//(End) GUI-Thread.
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}//(End) impl details
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bool
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launchUI (Subsys::SigTerm& terminationHandle)
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{
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try
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{
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Thread {"GUI-Main", bind (&runGUI, terminationHandle)};
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return true; // if we reach this line...
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}
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catch(...)
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{
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if (!lumiera_error_peek())
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LUMIERA_ERROR_SET (gui, STATE, "unexpected error when starting the GUI thread");
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return false;
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} // note: lumiera_error state remains set
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}
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} // namespace gui
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extern "C" { /* ================== define a lumieraorg_Gui instance ======================= */
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LUMIERA_INTERFACE_INSTANCE (lumieraorg_interfacedescriptor, 0
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,lumieraorg_GuiStarterPlugin_descriptor
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, NULL, NULL, NULL
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, LUMIERA_INTERFACE_INLINE (name,
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const char*, (LumieraInterface ifa),
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{ (void)ifa; return "GuiStarterPlugin"; }
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)
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, LUMIERA_INTERFACE_INLINE (brief,
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const char*, (LumieraInterface ifa),
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{ (void)ifa; return "entry point to start up the Lumiera GTK GUI contained in this dynamic module"; }
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)
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, LUMIERA_INTERFACE_INLINE (homepage,
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const char*, (LumieraInterface ifa),
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{ (void)ifa; return "http://www.lumiera.org/develompent.html" ;}
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)
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, LUMIERA_INTERFACE_INLINE (version,
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const char*, (LumieraInterface ifa),
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{ (void)ifa; return "0.1~pre"; }
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)
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, LUMIERA_INTERFACE_INLINE (author,
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const char*, (LumieraInterface ifa),
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{ (void)ifa; return "Joel Holdsworth, Christian Thaeter, Hermann Vosseler"; }
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)
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, LUMIERA_INTERFACE_INLINE (email,
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const char*, (LumieraInterface ifa),
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{ (void)ifa; return "Lumiera@lists.lumiera.org"; }
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)
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, LUMIERA_INTERFACE_INLINE (copyright,
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const char*, (LumieraInterface ifa),
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{
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(void)ifa;
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return
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"Copyright (C) Lumiera.org\n"
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"2007-2008, Joel Holdsworth <joel@airwebreathe.org.uk>\n"
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"2009, Christian Thaeter <ct@pipapo.org>\n"
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" Hermann Vosseler <Ichthyostega@web.de>";
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}
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)
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, LUMIERA_INTERFACE_INLINE (license,
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const char*, (LumieraInterface ifa),
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{
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(void)ifa;
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return
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"This program is free software; you can redistribute it and/or modify\n"
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"it under the terms of the GNU General Public License as published by\n"
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"the Free Software Foundation; either version 2 of the License, or\n"
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"(at your option) any later version.\n"
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"\n"
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"This program is distributed in the hope that it will be useful,\n"
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"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
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"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
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"GNU General Public License for more details.\n"
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"\n"
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"You should have received a copy of the GNU General Public License\n"
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"along with this program; if not, write to the Free Software\n"
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"Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA";
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}
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)
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, LUMIERA_INTERFACE_INLINE (state,
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int, (LumieraInterface ifa),
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{(void)ifa; return LUMIERA_INTERFACE_EXPERIMENTAL; }
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)
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, LUMIERA_INTERFACE_INLINE (versioncmp,
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int, (const char* a, const char* b),
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{(void)a;(void)b; return 0;} ////////////////////////////////////////////TODO define version ordering
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)
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);
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LUMIERA_EXPORT( /* ===================== PLUGIN EXPORTS ================================== */
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LUMIERA_INTERFACE_DEFINE (lumieraorg_Gui, 1
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,lumieraorg_GuiStarterPlugin
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, LUMIERA_INTERFACE_REF(lumieraorg_interfacedescriptor, 0, lumieraorg_GuiStarterPlugin_descriptor)
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, NULL /* on open */
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, NULL /* on close */
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, LUMIERA_INTERFACE_INLINE (launchUI,
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bool, (void* termSig),
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{
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return gui::launchUI (*reinterpret_cast<Subsys::SigTerm *> (termSig));
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}
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)
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)
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);
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} // extern "C"
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