job.cpp

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/*
  Job  -  render job closure

  Copyright (C)         Lumiera.org
    2012,               Hermann Vosseler <Ichthyostega@web.de>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 2 of
  the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

* *****************************************************/


#include "vault/gear/job.h"
#include "vault/gear/nop-job-functor.hpp"
#include "lib/util.hpp"

#include <boost/functional/hash.hpp>
#include <typeinfo>


namespace vault{
namespace gear {
  
  namespace { // Details...
    
    inline JobClosure&
    myClosure (const Job * const self)
    {
      ASSERT (self);
      ASSERT (self->jobClosure);
      return *static_cast<JobClosure*> (self->jobClosure);
    }
    
  } // (END) Details...
  
  
  using lib::HashVal;
  using util::isSameObject;
  
  
  
  JobFunctor::~JobFunctor() { }
  JobClosure::~JobClosure() { } 
  
  NopJobFunctor::NopJobFunctor() { }
  
  
  
  
  void
  Job::triggerJob()  const
  {
    myClosure(this).invokeJobOperation (parameter);
  }
  
  
  JobKind
  Job::getKind()  const
  {
    return myClosure(this).getJobKind();
  }
  
  
  bool
  Job::usesClosure (JobClosure const& otherClosure)  const
    {
      return isSameObject (myClosure(this), otherClosure);
    }

  
  
  HashVal
  hash_value (Job const& job)
  {
    return myClosure(&job).hash_value (job.parameter);
  }
  
  HashVal
  JobClosure::hash_value (JobParameter parameter)  const
    {
      HashVal hash = this->hashOfInstance (parameter.invoKey);
      boost::hash_combine(hash, typeid(*this).hash_code());
      boost::hash_combine(hash, parameter.nominalTime);
      return hash;
    }
  
  
}} // namespace vault::gear

namespace {
  using vault::gear::Job;
    
  inline Job& 
  forwardInvocation (lumiera_jobDefinition& jobDef)
  {
    Job& job = static_cast<Job&> (jobDef);
    return job;
  }
}



extern "C" { /* ==== implementation C interface for job invocation ======= */
  
void
lumiera_job_invoke  (LumieraJobDefinition jobDef)
{
  REQUIRE (jobDef);
  forwardInvocation(*jobDef).triggerJob();
}

size_t
lumiera_job_get_hash (LumieraJobDefinition jobDef)
{
  REQUIRE (jobDef);
  return hash_value (forwardInvocation (*jobDef));
}

#include "lib/luid.h"

int
lumiera_invokey_eq (void* l, void* r)
{
  return lumiera_uid_eq ((LumieraUid)l, (LumieraUid)r);
}
}/* extern "C" */