Merge branch 'constcnv.AthenaBaseComps-20201007' into 'master'

AthenaBaseComps: Add AthConstConverter.

See merge request atlas/athena!37046

Control/AthenaBaseComps/AthenaBaseComps/AthConstConverter.h

+// This file's extension implies that it's C, but it's really -*- C++ -*-.
+/*
+ * Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration.
+ */
+/**
+ * @file AthenaBaseComps/AthConstConverter.h
+ * @author scott snyder <snyder@bnl.gov>
+ * @date Oct, 2020
+ * @brief Gaudi converter base class with const interfaces.
+ */
+
+
+#ifndef ATHENABASECOMPS_ATHCONSTCONVERTER_H
+#define ATHENABASECOMPS_ATHCONSTCONVERTER_H
+
+
+#include "AthenaBaseComps/AthMessaging.h"
+#include "AthenaBaseComps/AthMsgStreamMacros.h"
+#include "GaudiKernel/Converter.h"
+
+
+/**
+ * @brief Gaudi converter base class with const interfaces.
+ *
+ * This is a version of Gaudi Converter which uses const
+ * @c createRepConst and @c createObjConst methods instead
+ * of @c createObj and @c createRep.  This can be used for converters
+ * that one wants to execute concurrently in MT jobs.
+ *
+ * As a bonus, we also include @c AthMessaging functionality.
+ */
+class AthConstConverter : public Converter, public AthMessaging
+{
+public:
+  AthConstConverter (long storage_type,
+                     const CLID& class_type,
+                     ISvcLocator* svc,
+                     const std::string& name)
+    : Converter (storage_type, class_type, svc),
+      AthMessaging (msgSvc().get(), name),
+      m_name (name)
+  {
+  }
+
+
+  /// Create the transient representation of an object.
+  virtual StatusCode createObjConst( IOpaqueAddress* pAddress,
+                                     DataObject*& refpObject ) const;
+
+  /// Convert the transient object to the requested representation.
+  virtual StatusCode createRepConst( DataObject* pObject,
+                                     IOpaqueAddress*& refpAddress ) const;
+
+
+  /// Create the transient representation of an object.
+  // Non-const version; just calls the const version.
+  virtual StatusCode createObj( IOpaqueAddress* pAddress,
+                                DataObject*& refpObject ) override final;
+
+
+  /// Convert the transient object to the requested representation.
+  // Non-const version; just calls the const version.
+  virtual StatusCode createRep( DataObject* pObject,
+                                IOpaqueAddress*& refpAddress ) override final;
+
+
+  std::string name() const { return m_name; }
+
+
+private:
+  std::string m_name;
+};
+
+
+#endif // not ATHENABASECOMPS_ATHCONSTCONVERTER_H

Control/AthenaBaseComps/src/AthConstConverter.cxx

+/*
+ * Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration.
+ */
+/**
+ * @file AthenaBaseComps/AthConstConverter.h
+ * @author scott snyder <snyder@bnl.gov>
+ * @date Oct, 2020
+ * @brief Gaudi converter base class with const interfaces.
+ */
+
+
+#include "AthenaBaseComps/AthConstConverter.h"
+
+
+/**
+ * @brief Create the transient representation of an object.
+ *
+ * The default implementation is a no-op.
+ */
+StatusCode AthConstConverter::createObjConst( IOpaqueAddress* /*pAddress*/,
+                                              DataObject*& /*refpObject*/ ) const
+{
+  return StatusCode::SUCCESS;
+}
+
+
+/**
+ * @brief Convert the transient object to the requested representation.
+ *
+ * The default implementation is a no-op.
+ */
+StatusCode AthConstConverter::createRepConst( DataObject* /*pObject*/,
+                                              IOpaqueAddress*& /*refpAddress*/ ) const
+{
+  return StatusCode::SUCCESS;
+}
+
+
+/**
+ * @brief Create the transient representation of an object.
+ *
+ * Non-const version; just calls the const version.
+ */
+StatusCode AthConstConverter::createObj( IOpaqueAddress* pAddress,
+                                         DataObject*& refpObject )
+{
+  return createObjConst (pAddress, refpObject);
+}
+
+
+/**
+ * @brief Convert the transient object to the requested representation.
+ *
+ * Non-const version; just calls the const version.
+ */
+StatusCode AthConstConverter::createRep( DataObject* pObject,
+                                         IOpaqueAddress*& refpAddress )
+{
+  return createRepConst (pObject, refpAddress);
+}
+