ChangeLogTag: Sun Jan 23 01:54:59 2005 Marek Brudka <mbrudka@aster.pl>

1 files changed, 90 insertions, 0 deletions

diff --git a/TAO/tao/GUIResource_Factory.h b/TAO/tao/GUIResource_Factory.h
new file mode 100644
index 00000000000..e10a3770497
--- /dev/null
+++ b/TAO/tao/GUIResource_Factory.h
@@ -0,0 +1,90 @@
+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file   GUI_Resource_Factory.h
+ *
+ *  $Id$
+ *
+ *  @author Balachandran Natarajan <bala@cs.wustl.edu>
+ *  @author Marek Brudka <mbrudka@aster.pl>
+ */
+//=============================================================================
+
+#ifndef TAO_GUI_RESOURCE_FACTORY_H
+#define TAO_GUI_RESOURCE_FACTORY_H
+#include /**/ "ace/pre.h"
+#include "ace/Thread_Mutex.h"
+#include "tao/TAO_Export.h"
+#include "tao/orbconf.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+//forwards
+class ACE_Reactor_Impl;
+class ACE_Reactor;
+
+namespace TAO
+{
+  /** Abstract base class for the GUI resource factory.
+   *
+   * This base class for resource factories which provide
+   * GUIReactors integrated with specific GUI
+   * event loop. In general, children of this class reimplement
+   * reactor_impl method where specific
+   * GUIReactor is created. GUIResource_Factory are usually
+   * created by GUIResource_Loader subclasses.
+   * Children of this class will be held in TSS by the ORB Core.
+   */
+  class TAO_Export GUIResource_Factory
+  {
+  public:
+
+    GUIResource_Factory ();
+
+    virtual ~GUIResource_Factory ();
+
+    /** Create ACE_Reactor using allocate_reactor_impl.
+     * Please note that this call is NOT synchronized. Left to the
+     * higher level versions to synchronize access.
+     */
+    virtual ACE_Reactor *get_reactor (void) ;
+
+    /** Reclaim the reactor if allocated by this factory.
+     * Please note that this call is NOT synchronized. Left to the
+     * higher level versions to synchronize access.
+     */
+    virtual void reclaim_reactor (ACE_Reactor *);
+
+  protected:
+
+    /** Create or return current reactor instance.
+     * Please note that this call is NOT synchronized. Left to the
+     * get_reactor to synchronize access.
+     */
+    virtual ACE_Reactor_Impl *reactor_impl (void) = 0;
+
+  private:
+
+    /**
+     * Flag that is set to 1 if the reactor obtained from the
+     * get_reactor() method is dynamically allocated.  If this flag is
+     * set to 1, then the reclaim_reactor() method with call the delete
+     * operator on the given reactor.  This flag is necessary to make
+     * sure that a reactor not allocated by the default resource factory
+     * is not reclaimed by the default resource factory.  Such a
+     * situation can occur when a resource factory derived from the
+     * default one overrides the get_reactor() method but does not
+     * override the reclaim_reactor() method.
+     */
+    int dynamically_allocated_reactor_;
+
+    /// for internal locking.
+    TAO_SYNCH_MUTEX lock_;
+  };
+}
+
+#include /**/ "ace/post.h"
+#endif /*TAO_GUI_RESOURCE_FACTORY_H*/