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#ifndef FWCore_Concurrency_SharedResourceNames_h
#define FWCore_Concurrency_SharedResourceNames_h
//
// Package: Concurrency
// Class : ShareResourceNames
//
/**\class edm::SharedResourceNames
Description: Contains the names of external shared resources.
*/
//
// Original Author: W. David Dagenhart
// Created: 19 November 2013
//
#include <string>
namespace edm {
class SharedResourceNames {
public:
// GEANT 4.9.X needs to be declared a shared resource
// In the future, 4.10.X and later might not need to be
static const std::string kGEANT;
static const std::string kCLHEPRandomEngine;
static const std::string kPythia6;
static const std::string kPythia8;
static const std::string kPhotos;
static const std::string kTauola;
static const std::string kEvtGen;
};
//ES modules can not share resources with ED modules
class ESSharedResourceNames {
public:
static const std::string kDDGeometry;
static const std::string kDD4hep;
};
// Each time the following function is called, it returns a different
// name. The purpose is to address the following problem.
// A few classes that are modules sometimes use shared resources
// and sometimes do not use shared resources. It depends on their
// configuration and also on their template parameters. These classes
// have to always inherit from the SharedResources base class. If
// they do not declare any share resources the Framework assumes
// they depend on all possible shared resources. This causes performance
// problems. In the cases where they really do not use any shared
// resources, one has to declare something to avoid the default
// assumption that they depend on everything. If a nonexistent
// shared resource is declared and as long as nothing else declares
// the same shared resource name, there will be no performance effects.
// This function provides a unique name to be used for that purpose.
std::string uniqueSharedResourceName();
} // namespace edm
#endif
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