[arcane,core] Ajoute méthodes dans 'VariableUtils' pour marquer les variables principalement en lecture seule.

Author: grospelliergilles

arcane/src/arcane/core/VariableUtils.cc

@@ -20,6 +20,9 @@
 #include "arcane/core/IVariable.h"
 #include "arcane/core/VariableRef.h"
 #include "arcane/core/internal/IDataInternal.h"
+#include "arcane/core/datatype/DataAllocationInfo.h"
+#include "arcane/core/materials/MeshMaterialVariableRef.h"
+#include "arcane/core/materials/internal/IMeshMaterialVariableInternal.h"
 
 /*---------------------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/
@@ -66,6 +69,36 @@ prefetchVariableAsync(VariableRef& var, RunQueue* queue_or_null)
 /*---------------------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/
 
+void VariableUtils::
+markVariableAsMostlyReadOnly(IVariable* var)
+{
+  DataAllocationInfo alloc_info(eMemoryLocationHint::HostAndDeviceMostlyRead);
+  var->setAllocationInfo(alloc_info);
+}
+
+/*---------------------------------------------------------------------------*/
+/*---------------------------------------------------------------------------*/
+
+void VariableUtils::
+markVariableAsMostlyReadOnly(VariableRef& var)
+{
+  return markVariableAsMostlyReadOnly(var.variable());
+}
+
+/*---------------------------------------------------------------------------*/
+/*---------------------------------------------------------------------------*/
+
+void VariableUtils::
+markVariableAsMostlyReadOnly(::Arcane::Materials::MeshMaterialVariableRef& var)
+{
+  auto vars = var.materialVariable()->_internalApi()->variableReferenceList();
+  for (VariableRef* v : vars)
+    markVariableAsMostlyReadOnly(v->variable());
+}
+
+/*---------------------------------------------------------------------------*/
+/*---------------------------------------------------------------------------*/
+
 } // namespace Arcane
 
 /*---------------------------------------------------------------------------*/

arcane/src/arcane/core/VariableUtils.h

@@ -15,6 +15,7 @@
 /*---------------------------------------------------------------------------*/
 
 #include "arcane/core/ArcaneTypes.h"
+#include "arcane/core/materials/MaterialsCoreGlobal.h"
 
 /*---------------------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/
@@ -44,6 +45,29 @@ void prefetchVariableAsync(IVariable* var, RunQueue* queue_or_null);
 extern "C++" ARCANE_CORE_EXPORT
 void prefetchVariableAsync(VariableRef& var, RunQueue* queue_or_null);
 
+/*!
+ * \brief Indique que la variable est essentiellement en lecture.
+ *
+ * Cela est utilisé uniquement avec les accélérateurs et permet d'éviter
+ * des transferts mémoire en l'accélérateur et le CPU.
+ */
+extern "C++" ARCANE_CORE_EXPORT
+void markVariableAsMostlyReadOnly(IVariable* var);
+
+/*!
+ * \brief Indique que la variable est essentiellement en lecture.
+ * \a void markVariableAsMostlyReadOnly(IVariableRef* var);
+ */
+extern "C++" ARCANE_CORE_EXPORT
+void markVariableAsMostlyReadOnly(VariableRef& var);
+
+/*!
+ * \brief Indique que la variable est essentiellement en lecture.
+ * \a void markVariableAsMostlyReadOnly(IVariableRef* var);
+ */
+extern "C++" ARCANE_CORE_EXPORT
+void markVariableAsMostlyReadOnly(::Arcane::Materials::MeshMaterialVariableRef& var);
+
 /*---------------------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/