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diff --git a/ace/IPC/SV_Shared_Memory.h b/ace/IPC/SV_Shared_Memory.h
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+++ b/ace/IPC/SV_Shared_Memory.h
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+/* -*- C++ -*- */
+
+//=============================================================================
+/**
+ *  @file    SV_Shared_Memory.h
+ *
+ *  $Id$
+ *
+ *  @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
+ */
+//=============================================================================
+
+#ifndef ACE_SV_SHARED_MEMORY_H
+#define ACE_SV_SHARED_MEMORY_H
+#include "ace/pre.h"
+
+#include "ace/ACE.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+/**
+ * @class ACE_SV_Shared_Memory
+ *
+ * @brief This is a wrapper for System V shared memory.
+ */
+class ACE_Export ACE_SV_Shared_Memory
+{
+public:
+  enum
+  {
+    ACE_CREATE = IPC_CREAT,
+    ACE_OPEN   = 0
+  };
+
+  // = Initialization and termination methods.
+  ACE_SV_Shared_Memory (void);
+  ACE_SV_Shared_Memory (key_t external_id,
+                        size_t size,
+                        int create,
+                        int perms = ACE_DEFAULT_FILE_PERMS,
+                        void *virtual_addr = 0,
+                        int flags = 0);
+
+  ACE_SV_Shared_Memory (ACE_HANDLE internal_id,
+                        int flags = 0);
+
+  int  open (key_t external_id,
+             size_t size,
+             int create = ACE_SV_Shared_Memory::ACE_OPEN,
+             int perms = ACE_DEFAULT_FILE_PERMS);
+
+  int  open_and_attach (key_t external_id,
+                        size_t size,
+                        int create = ACE_SV_Shared_Memory::ACE_OPEN,
+                        int perms = ACE_DEFAULT_FILE_PERMS,
+                        void *virtual_addr = 0,
+                        int flags = 0);
+
+  /// Attach this shared memory segment.
+  int  attach (void *virtual_addr = 0,
+               int flags =0);
+
+  /// Detach this shared memory segment.
+  int  detach (void);
+
+  /// Remove this shared memory segment.
+  int  remove (void);
+
+  /// Forward to underlying System V <shmctl>.
+  int  control (int cmd, void *buf);
+
+  // = Segment-related info.
+  void *get_segment_ptr (void) const;
+  int  get_segment_size (void) const;
+
+  /// Return the ID of the shared memory segment (i.e., an ACE_HANDLE).
+  ACE_HANDLE get_id (void) const;
+
+  /// Dump the state of an object.
+  void dump (void) const;
+
+  /// Declare the dynamic allocation hooks.
+  ACE_ALLOC_HOOK_DECLARE;
+
+protected:
+  enum
+  {
+    /// Most restrictive alignment.
+    ALIGN_WORDB = 8
+  };
+
+  /// Internal identifier.
+  ACE_HANDLE internal_id_;
+
+  /// Size of the mapped segment.
+  int size_;
+
+  /// Pointer to the beginning of the segment.
+  void *segment_ptr_;
+
+  /// Round up to an appropriate page size.
+  int round_up (size_t len);
+};
+
+#if defined (__ACE_INLINE__)
+#include "ace/SV_Shared_Memory.i"
+#endif /* __ACE_INLINE__ */
+
+#include "ace/post.h"
+#endif /* ACE_SV_SHARED_MEMORY_H */