Framework/interface/PrincipalCache.h

0001 #ifndef FWCore_Framework_PrincipalCache_h
0002 #define FWCore_Framework_PrincipalCache_h
0003
0004 /*
0005 Contains smart pointers to the RunPrincipals,
0006 LuminosityBlockPrincipals, EventPrincipals,
0007 and ProcessBlockPrincipals. It keeps the
0008 objects alive so they can be reused as
0009 necessary.
0010
0011 Original Author: W. David Dagenhart
0012 */
0013
0014 #include "FWCore/Utilities/interface/ReusableObjectHolder.h"
0015
0016 #include <memory>
0017 #include <vector>
0018
0019 namespace edm {
0020
0021   class ProcessBlockPrincipal;
0022   class RunPrincipal;
0023   class LuminosityBlockPrincipal;
0024   class EventPrincipal;
0025   class ProductRegistry;
0026   class PreallocationConfiguration;
0027
0028   class PrincipalCache {
0029   public:
0030     PrincipalCache();
0031     ~PrincipalCache();
0032     PrincipalCache(PrincipalCache&&) = default;
0033
0034     ProcessBlockPrincipal& processBlockPrincipal() const { return *processBlockPrincipal_; }
0035     ProcessBlockPrincipal& inputProcessBlockPrincipal() const { return *inputProcessBlockPrincipal_; }
0036
0037     enum class ProcessBlockType { New, Input };
0038     ProcessBlockPrincipal& processBlockPrincipal(ProcessBlockType processBlockType) const {
0039       return processBlockType == ProcessBlockType::Input ? *inputProcessBlockPrincipal_ : *processBlockPrincipal_;
0040     }
0041
0042     std::shared_ptr<RunPrincipal> getAvailableRunPrincipalPtr();
0043     std::shared_ptr<LuminosityBlockPrincipal> getAvailableLumiPrincipalPtr();
0044
0045     EventPrincipal& eventPrincipal(unsigned int iStreamIndex) const { return *(eventPrincipals_[iStreamIndex]); }
0046
0047     void setNumberOfConcurrentPrincipals(PreallocationConfiguration const&);
0048     void insert(std::unique_ptr<ProcessBlockPrincipal>);
0049     void insertForInput(std::unique_ptr<ProcessBlockPrincipal>);
0050     void insert(std::unique_ptr<RunPrincipal>);
0051     void insert(std::unique_ptr<LuminosityBlockPrincipal>);
0052     void insert(std::shared_ptr<EventPrincipal>);
0053
0054   private:
0055     std::unique_ptr<ProcessBlockPrincipal> processBlockPrincipal_;
0056     std::unique_ptr<ProcessBlockPrincipal> inputProcessBlockPrincipal_;
0057     edm::ReusableObjectHolder<RunPrincipal> runHolder_;
0058     edm::ReusableObjectHolder<LuminosityBlockPrincipal> lumiHolder_;
0059     std::vector<std::shared_ptr<EventPrincipal>> eventPrincipals_;
0060   };
0061 }  // namespace edm
0062
0063 #endif