From 0e49389337be86641451a5c36c24bf742fe97523 Mon Sep 17 00:00:00 2001
From: "William R. Otte" <wotte@dre.vanderbilt.edu>
Date: Mon, 24 Jul 2006 15:50:21 +0000
Subject: Repo restructuring

---
 TAO/tao/LF_Strategy.h | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 TAO/tao/LF_Strategy.h

(limited to 'TAO/tao/LF_Strategy.h')

diff --git a/TAO/tao/LF_Strategy.h b/TAO/tao/LF_Strategy.h
new file mode 100644
index 00000000000..782821a2542
--- /dev/null
+++ b/TAO/tao/LF_Strategy.h
@@ -0,0 +1,82 @@
+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file LF_Strategy.h
+ *
+ *  $Id$
+ *
+ *  @author Carlos O'Ryan <coryan@uci.edu>
+ */
+//=============================================================================
+
+#ifndef TAO_LF_STRATEGY_H
+#define TAO_LF_STRATEGY_H
+
+#include /**/ "ace/pre.h"
+
+#include "tao/TAO_Export.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "tao/Versioned_Namespace.h"
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+class ACE_Time_Value;
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+TAO_BEGIN_VERSIONED_NAMESPACE_DECL
+
+class TAO_Leader_Follower;
+
+/**
+ * @brief Strategize Leader/Follower manipulations in the ORB event
+ * loop.
+ *
+ * The ORB event loop must participate in the Leader/Followers
+ * protocol, but only if that concurrency model is configured,
+ * otherwise performance suffers.
+ *
+ * This class strategizes the ORB behavior in this respect.
+ */
+class TAO_Export TAO_LF_Strategy
+{
+public:
+  /// Destructor
+  virtual ~TAO_LF_Strategy (void);
+
+  /// The current thread will handle an upcall
+  /**
+   * Threads that handle requests can block for long periods of time,
+   * causing deadlocks if they don't elect a new leader before
+   * starting the upcall the system can become non-responsive or
+   * dead-lock.
+   */
+  virtual void set_upcall_thread (TAO_Leader_Follower &) = 0;
+
+  /// The current thread is entering the reactor event loop
+  /**
+   * Threads that block in the reactor event loop become "server"
+   * threads for the Leader/Follower set.  They must be flagged
+   * specially because they do not wait for one specific event, but
+   * for any event whatsoever.
+   */
+  virtual int set_event_loop_thread (ACE_Time_Value *max_wait_time,
+                                     TAO_Leader_Follower &) = 0;
+
+  /// The current thread is leaving the event loop
+  /**
+   * When the thread leaves the event loop a new leader must be
+   * elected.
+   */
+  virtual void reset_event_loop_thread (int call_reset,
+                                        TAO_Leader_Follower &) = 0;
+};
+
+TAO_END_VERSIONED_NAMESPACE_DECL
+
+#include /**/ "ace/post.h"
+
+#endif  /* TAO_LF_STRATEGY_H */
-- 
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