BoincPoseObserver.cc

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// -*- mode:c++;tab-width:2;indent-tabs-mode:t;show-trailing-whitespace:t;rm-trailing-spaces:t -*-
// vi: set ts=2 noet:
//
// (c) Copyright Rosetta Commons Member Institutions.
// (c) This file is part of the Rosetta software suite and is made available under license.
// (c) The Rosetta software is developed by the contributing members of the Rosetta Commons.
// (c) For more information, see http://www.rosettacommons.org. Questions about this can be
// (c) addressed to University of Washington UW TechTransfer, email: license@u.washington.edu.

/// @file   protocols/boinc/BoincPoseObserver.cc
/// @brief  BoincPoseObserver class

#ifdef BOINC_GRAPHICS

// Unit headers
#include <protocols/boinc/BoincPoseObserver.hh>

#include <protocols/boinc/boinc.hh>

#include <core/pose/Pose.hh>
#include <core/pose/signals/ConformationEvent.hh>

#include <core/io/serialization/serialize_pose.hh>


namespace protocols {
namespace boinc {

/// @brief default constructor
BoincCurrentPoseObserver::BoincCurrentPoseObserver()
{
  shmem_ = protocols::boinc::Boinc::get_shmem();
}


/// @brief default destructor
BoincCurrentPoseObserver::~BoincCurrentPoseObserver()
{
  detach_from();
}


/// @brief attach to Pose
void
BoincCurrentPoseObserver::attach_to( Pose & pose )
{
  detach_from();
  conf_event_link_ = pose.attach_conformation_obs( &BoincCurrentPoseObserver::on_conf_change, this );
}


/// @brief detach from Pose
void
BoincCurrentPoseObserver::detach_from()
{
  conf_event_link_.invalidate();
}


/// @brief on receiving an ConformationEvent, copy Pose to boinc shared memory
void
BoincCurrentPoseObserver::on_conf_change(
  ConformationEvent const & event
)
{
  static int count = 0;
  if (count > 0) {
    count--;
    return;
  }
  count = SKIP_FOR_EFFICIENCY;
  if (!shmem_) return;
  if (!Boinc::trywait_semaphore()) {
    boinc_begin_critical_section();
    if (event.pose->total_residue() > 0) {
      core::io::serialization::BUFFER b((char*)(&shmem_->current_pose_buf ),POSE_BUFSIZE);
      write_binary(*event.pose,b);
      shmem_->current_pose_exists = 1;
    }
    boinc_end_critical_section();
    Boinc::unlock_semaphore();
  }
}


} // namespace boinc
} // namespace protocols

#endif