1 files changed, 80 insertions, 0 deletions
diff --git a/trunk/TAO/orbsvcs/orbsvcs/ESF/ESF_Busy_Lock.h b/trunk/TAO/orbsvcs/orbsvcs/ESF/ESF_Busy_Lock.h
new file mode 100644
index 00000000000..2e540ea1b5d
--- /dev/null
+++ b/trunk/TAO/orbsvcs/orbsvcs/ESF/ESF_Busy_Lock.h
@@ -0,0 +1,80 @@
+/* -*- C++ -*- */
+/**
+ *  @file   ESF_Busy_Lock.h
+ *
+ *  $Id$
+ *
+ *  @author Carlos O'Ryan (coryan@cs.wustl.edu)
+ *
+ *  http://doc.ece.uci.edu/~coryan/EC/index.html
+ */
+
+#ifndef TAO_ESF_BUSY_LOCK_H
+#define TAO_ESF_BUSY_LOCK_H
+
+#include "ace/config-all.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+TAO_BEGIN_VERSIONED_NAMESPACE_DECL
+
+/// Adapt classes that implement the "busy lock" protocol, to conform
+/// to the ACE Lock interface.
+/**
+ * The ACE Lock interface allows us to use any mutex-like object with
+ * the ACE synchronization components (such as guards, Lock_Adapter,
+ * etc.).
+ * One of the synchronization protocols used in the event services
+ * uses the following protocol:
+ * <UL>
+ * <LI> To acquire the lock the @c busy method of the object is invoked.
+ * <LI> To release the lock the @c idle method of the object is invoked.
+ * <LI> Any changes performed while the lock is held are delayed until
+ *      all the locks are released, i.e. the last call to @c idle
+ *      executes the changes.
+ * </UL>
+ */
+template<class Adaptee>
+class TAO_ESF_Busy_Lock_Adapter
+{
+public:
+  /// Constructor
+  TAO_ESF_Busy_Lock_Adapter (Adaptee* adaptee);
+
+  /**
+   * @name The ACE_Lock methods
+   *
+   * Check the documentation in ace/Synch.h for details.
+   */
+  //@{
+  int remove (void);
+  int acquire (void);
+  int tryacquire (void);
+  int release (void);
+  int acquire_read (void);
+  int acquire_write (void);
+  int tryacquire_read (void);
+  int tryacquire_write (void);
+  //@}
+
+private:
+  Adaptee* adaptee_;
+};
+
+TAO_END_VERSIONED_NAMESPACE_DECL
+
+#if defined (__ACE_INLINE__)
+#include "orbsvcs/ESF/ESF_Busy_Lock.inl"
+#endif /* __ACE_INLINE__ */
+
+#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
+#include "orbsvcs/ESF/ESF_Busy_Lock.cpp"
+#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
+
+#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
+#pragma implementation ("ESF_Busy_Lock.cpp")
+#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
+
+#endif /* TAO_ESF_BUSY_LOCK_H */