// Filename: pipeline.I
// Created by:  drose (21Feb02)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) Carnegie Mellon University.  All rights reserved.
//
// All use of this software is subject to the terms of the revised BSD
// license.  You should have received a copy of this license along
// with this source code in a file named "LICENSE."
//
////////////////////////////////////////////////////////////////////


////////////////////////////////////////////////////////////////////
//     Function: Pipeline::get_render_pipeline
//       Access: Public, Static
//  Description: Returns a pointer to the global render pipeline.
////////////////////////////////////////////////////////////////////
INLINE Pipeline *Pipeline::
get_render_pipeline() {
  if (_render_pipeline == (Pipeline *)NULL) {
    make_render_pipeline();
  }
  return _render_pipeline;
}

////////////////////////////////////////////////////////////////////
//     Function: Pipeline::set_min_stages
//       Access: Public
//  Description: Ensures that at least the indicated number of stages
//               are in the pipeline.
////////////////////////////////////////////////////////////////////
INLINE void Pipeline::
set_min_stages(int min_stages) {
  set_num_stages(max(min_stages, get_num_stages()));
}

////////////////////////////////////////////////////////////////////
//     Function: Pipeline::get_num_stages
//       Access: Public
//  Description: Returns the number of stages required for the
//               pipeline.
////////////////////////////////////////////////////////////////////
INLINE int Pipeline::
get_num_stages() const {
  return _num_stages;
}

#ifdef THREADED_PIPELINE
////////////////////////////////////////////////////////////////////
//     Function: Pipeline::get_num_cyclers
//       Access: Public
//  Description: Returns the number of PipelineCyclers in the universe
//               that reference this Pipeline object.
////////////////////////////////////////////////////////////////////
INLINE int Pipeline::
get_num_cyclers() const {
  ReMutexHolder holder(_lock);
  return _num_cyclers;
}
#endif  // THREADED_PIPELINE

#ifdef THREADED_PIPELINE
////////////////////////////////////////////////////////////////////
//     Function: Pipeline::get_num_dirty_cyclers
//       Access: Public
//  Description: Returns the number of PipelineCyclers in the universe
//               that reference this Pipeline object and are currently
//               marked "dirty"; that is, there is a difference in
//               pointer value between some of their stages.
////////////////////////////////////////////////////////////////////
INLINE int Pipeline::
get_num_dirty_cyclers() const {
  ReMutexHolder holder(_lock);
  return _dirty_cyclers.size();
}
#endif  // THREADED_PIPELINE