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File indexing completed on 2024-10-07 04:59:29
0001 // -*- C++ -*- 0002 #ifndef FWCore_Framework_ESSourceConcurrentESProductResolverTemplate_h 0003 #define FWCore_Framework_ESSourceConcurrentESProductResolverTemplate_h 0004 // 0005 // Package: FWCore/Framework 0006 // Class : ESSourceConcurrentESProductResolverTemplate 0007 // 0008 /**\class edm::eventsetup::ESSourceConcurrentESProductResolverTemplate 0009 0010 Description: An ESSource specific ESProductResolver which is type safe and can run concurrently with other ESProductResolvers from the same ESSource. 0011 0012 Usage: 0013 Inherit from this class and override 0014 `void prefetch(edm::eventsetup::DataKey const& iKey)` 0015 and 0016 `DataT const* fetch() const` 0017 0018 prefetch is guaranteed to be called before fetch where fetch should return the value obtained during the call to prefetch. 0019 The inheriting class must maintain the lifetime of the object returned from fetch until invalidateCache() is called. 0020 0021 */ 0022 // 0023 // Original Author: Chris Jones 0024 // Created: 17/12/2021 0025 // 0026 0027 // system include files 0028 0029 // user include files 0030 #include "FWCore/Framework/interface/ESSourceProductResolverConcurrentBase.h" 0031 0032 // forward declarations 0033 0034 namespace edm::eventsetup { 0035 template <typename DataT> 0036 class ESSourceConcurrentESProductResolverTemplate : public ESSourceProductResolverConcurrentBase { 0037 public: 0038 ESSourceConcurrentESProductResolverTemplate() = default; 0039 0040 ESSourceConcurrentESProductResolverTemplate(const ESSourceConcurrentESProductResolverTemplate&) = delete; 0041 const ESSourceConcurrentESProductResolverTemplate& operator=(const ESSourceConcurrentESProductResolverTemplate&) = 0042 delete; 0043 0044 // ---------- const member functions --------------------- 0045 0046 // ---------- static member functions -------------------- 0047 0048 // ---------- member functions --------------------------- 0049 protected: 0050 /** Inheriting classes must also override 0051 void prefetch(edm::eventsetup::DataKey const& iKey, EventSetupRecordDetails) override; 0052 */ 0053 0054 /** returns the data obtained in the call to prefetch */ 0055 virtual DataT const* fetch() const = 0; 0056 0057 private: 0058 void const* getAfterPrefetchImpl() const final { return fetch(); } 0059 }; 0060 } // namespace edm::eventsetup 0061 0062 #endif
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