ChangeLogTag: Mon Apr 2 15:02:26 UTC 2007 Chad Elliott <elliott_c@ociweb.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/ACE/ace/Service_Gestalt.h b/ACE/ace/Service_Gestalt.h
index 319ce7a0864..8a9949bd190 100644
--- a/ACE/ace/Service_Gestalt.h
+++ b/ACE/ace/Service_Gestalt.h
@@ -312,6 +312,9 @@ public:
     const ACE_Static_Svc_Descriptor *assd_;
   };
 
+  /// Get the current ACE_Service_Repository held by this object.
+  ACE_Service_Repository* current_service_repository (void);
+
 protected:
 
   /**
@@ -447,6 +450,45 @@ protected:
 }; /* class ACE_Service_Gestalt */
 
 
+/**
+ * @class ACE_Service_Type_Dynamic_Guard
+ *
+ * @brief A forward service declaration guard.
+ *
+ * Helps to resolve an issue with hybrid services, i.e. dynamic
+ * services, accompanied by static services in the same DLL.  Only
+ * automatic instances of SDG are supposed to exist. Those are
+ * created during (dynamic) service initialization and serve to:
+ *
+ * (a) Ensure the service we are loading is ordered last in the
+ * repository, following any other services it may cause to register,
+ * as part of its own registration. This is a common case when
+ * loading dynamic services from DLLs - there are often static
+ * initializers, which register static services.
+ *
+ * (b) The SDG instance destructor detects if the dynamic service
+ * initialized successfully and "fixes-up" all the newly registered
+ * static services to hold a reference to the DLL, from which they
+ * have originated.
+ */
+class ACE_Service_Type_Dynamic_Guard
+{
+public:
+  ACE_Service_Type_Dynamic_Guard (ACE_Service_Repository &r,
+                                  ACE_TCHAR const *name);
+
+  ~ACE_Service_Type_Dynamic_Guard (void);
+
+private:
+  ACE_Service_Repository & repo_;
+  size_t repo_begin_;
+  ACE_TCHAR const * const name_;
+  ACE_Service_Type const * dummy_;
+# if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
+  ACE_Guard< ACE_Recursive_Thread_Mutex > repo_monitor_;
+#endif
+};
+
 
 ACE_END_VERSIONED_NAMESPACE_DECL