globalTransitionAsync.h

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#ifndef FWCore_Framework_globalTransitionAsync_h
#define FWCore_Framework_globalTransitionAsync_h
// -*- C++ -*-
//
// Package:     FWCore/Framework
// Function:    globalTransitionAsync
// 
//
// Original Author:  Chris Jones
//         Created:  Tue, 06 Sep 2016 16:04:26 GMT
//

// system include files
#include "FWCore/Framework/interface/Schedule.h"
#include "FWCore/Framework/interface/SubProcess.h"
#include "FWCore/Concurrency/interface/WaitingTask.h"
#include "FWCore/Concurrency/interface/WaitingTaskHolder.h"

// user include files

// forward declarations

namespace edm {
  class IOVSyncValue;
  class EventSetup;
  class LuminosityBlockPrincipal;
  class RunPrincipal;
  
  //This is code in common between beginStreamRun and beginGlobalLuminosityBlock
  inline void subProcessDoGlobalBeginTransitionAsync(WaitingTaskHolder iHolder,SubProcess& iSubProcess, LuminosityBlockPrincipal& iPrincipal, IOVSyncValue const& iTS) {
    iSubProcess.doBeginLuminosityBlockAsync(std::move(iHolder),iPrincipal, iTS);
  }
  
  inline void subProcessDoGlobalBeginTransitionAsync(WaitingTaskHolder iHolder, SubProcess& iSubProcess, RunPrincipal& iPrincipal, IOVSyncValue const& iTS) {
    iSubProcess.doBeginRunAsync(std::move(iHolder),iPrincipal, iTS);
  }
  
  /*Not implemented yet
  inline void subProcessDoGlobalEndTransitionAsync(WaitingTaskHolder iHolder, SubProcess& iSubProcess, LuminosityBlockPrincipal& iPrincipal, IOVSyncValue const& iTS, bool cleaningUpAfterException) {
    iSubProcess.doEndLuminosityBlockAsync(std::move(iHolder),iPrincipal, iTS,cleaningUpAfterException);
  }
  
  inline void subProcessDoGlobalEndTransitionAsync(WaitingTaskHolder iHolder, SubProcess& iSubProcess, RunPrincipal& iPrincipal, IOVSyncValue const& iTS, bool cleaningUpAfterException) {
    iSubProcess.doEndRunAsync(std::move(iHolder), iPrincipal, iTS, cleaningUpAfterException);
  }
   */

  template<typename Traits, typename P, typename SC >
  void beginGlobalTransitionAsync(WaitingTaskHolder iWait,
                                  Schedule& iSchedule,
                                  P& iPrincipal,
                                  IOVSyncValue const & iTS,
                                  EventSetup const& iES,
                                  SC& iSubProcesses) {
    ServiceToken token = ServiceRegistry::instance().presentToken();

    //When we are done processing the global for this process,
    // we need to run the global for all SubProcesses
    auto subs = make_waiting_task(tbb::task::allocate_root(), [&iSubProcesses, iWait,&iPrincipal,iTS,token](std::exception_ptr const* iPtr) mutable {
      if(iPtr) {
        iWait.doneWaiting(*iPtr);
        return;
      }
      ServiceRegistry::Operate op(token);
      for_all(iSubProcesses, [&iWait, &iPrincipal, iTS](auto& subProcess){ subProcessDoGlobalBeginTransitionAsync(iWait,subProcess,iPrincipal, iTS); });
    });
    
    WaitingTaskHolder h(subs);
    iSchedule.processOneGlobalAsync<Traits>(std::move(h),iPrincipal, iES);
  }

  
  template<typename Traits, typename P, typename SC >
  void endGlobalTransitionAsync(WaitingTaskHolder iWait,
                                Schedule& iSchedule,
                                P& iPrincipal,
                                IOVSyncValue const & iTS,
                                EventSetup const& iES,
                                SC& iSubProcesses,
                                bool cleaningUpAfterException)
  {
    ServiceToken token = ServiceRegistry::instance().presentToken();
    
    //When we are done processing the global for this process,
    // we need to run the global for all SubProcesses
    auto subs = make_waiting_task(tbb::task::allocate_root(), [&iSubProcesses, iWait,&iPrincipal,iTS,token,cleaningUpAfterException](std::exception_ptr const* iPtr) mutable {
      if(iPtr) {
        iWait.doneWaiting(*iPtr);
        return;
      }
      ServiceRegistry::Operate op(token);
      for_all(iSubProcesses, [&iWait, &iPrincipal, iTS,cleaningUpAfterException](auto& subProcess){
        subProcessDoGlobalEndTransitionAsync(iWait,subProcess,iPrincipal, iTS,cleaningUpAfterException); });
    });
    
    WaitingTaskHolder h(subs);
    iSchedule.processOneGlobalAsync<Traits>(std::move(h),iPrincipal, iES,cleaningUpAfterException);
      
    
  }

};

#endif