89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
// Filename: pipelineCyclerBase.h
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// Created by: drose (21Feb02)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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#ifndef PIPELINECYCLERBASE_H
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#define PIPELINECYCLERBASE_H
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#include "pandabase.h"
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#include "cycleData.h"
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#include "pipeline.h"
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#include "pointerTo.h"
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////////////////////////////////////////////////////////////////////
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// Class : PipelineCyclerBase
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// Description : This is the non-template part of the implementation
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// of PipelineCycler. See PipelineCycler.
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//
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// We define this as a struct instead of a class to
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// guarantee byte placement within the object, so that
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// (particularly for the trivial implementation) the
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// inherited struct's data is likely to be placed by the
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// compiler at the "this" pointer.
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////////////////////////////////////////////////////////////////////
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struct EXPCL_PANDA PipelineCyclerBase {
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public:
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INLINE PipelineCyclerBase(CycleData *initial_data, Pipeline *pipeline = NULL);
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INLINE PipelineCyclerBase(CycleData *initial_data, const PipelineCyclerBase ©);
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INLINE void operator = (const PipelineCyclerBase ©);
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INLINE ~PipelineCyclerBase();
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INLINE const CycleData *read() const;
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INLINE void increment_read(const CycleData *pointer) const;
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INLINE void release_read(const CycleData *pointer) const;
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INLINE CycleData *write();
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INLINE CycleData *elevate_read(const CycleData *pointer);
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INLINE void release_write(CycleData *pointer);
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INLINE int get_num_stages();
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INLINE bool is_stage_unique(int n) const;
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INLINE CycleData *write_stage(int n);
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INLINE void release_write_stage(int n, CycleData *pointer);
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INLINE CycleData *cheat() const;
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INLINE int get_read_count() const;
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INLINE int get_write_count() const;
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#ifdef DO_PIPELINING
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// This private data is only stored here if we have pipelining
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// compiled in. Actually, this particular data is only used for
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// sanity checking the pipelining code; it doesn't do anything
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// useful.
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private:
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PT(CycleData) _data;
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Pipeline *_pipeline;
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short _read_count, _write_count;
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#else // !DO_PIPELINING
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// In a trivial implementation, we only need to store the CycleData
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// pointer. Actually, we don't even need to do that, if we're lucky
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// and the compiler doesn't do anything funny with the struct
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// layout.
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#ifndef SIMPLE_STRUCT_POINTERS
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CycleData *_data;
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#endif // SIMPLE_STRUCT_POINTERS
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#endif // DO_PIPELINING
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};
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#include "pipelineCyclerBase.I"
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#endif
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