90 lines
3.4 KiB
C
90 lines
3.4 KiB
C
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file pipelineCyclerDummyImpl.h
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* @author drose
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* @date 2006-01-31
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*/
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#ifndef PIPELINECYCLERDUMMYIMPL_H
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#define PIPELINECYCLERDUMMYIMPL_H
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#include "pandabase.h"
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#if defined(DO_PIPELINING) && !defined(HAVE_THREADS)
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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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* This is a simple, single-threaded-only implementation of
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* PipelineCyclerBase. It is only compiled when DO_PIPELINING is defined, but
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* threading is not available, which is usually the case only in development
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* mode.
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*
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* This implmentation is similar in principle to PipelineCyclerTrivialImpl,
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* except it does basic sanity checking to ensure that you use the interface
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* in a reasonable way consistent with its design (e.g., read() is balanced
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* with release_read(), etc.).
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*
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* This is defined as a struct instead of a class, mainly to be consistent
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* with PipelineCyclerTrivialImpl.
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*/
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struct EXPCL_PANDA_PIPELINE PipelineCyclerDummyImpl {
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public:
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INLINE PipelineCyclerDummyImpl(CycleData *initial_data, Pipeline *pipeline = nullptr);
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INLINE PipelineCyclerDummyImpl(const PipelineCyclerDummyImpl ©);
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INLINE void operator = (const PipelineCyclerDummyImpl ©);
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INLINE ~PipelineCyclerDummyImpl();
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INLINE void acquire(Thread *current_thread = nullptr);
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INLINE void release();
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INLINE const CycleData *read_unlocked(Thread *current_thread) const;
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INLINE const CycleData *read(Thread *current_thread) 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(Thread *current_thread);
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INLINE CycleData *write_upstream(bool force_to_0, Thread *current_thread);
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INLINE CycleData *elevate_read(const CycleData *pointer, Thread *current_thread);
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INLINE CycleData *elevate_read_upstream(const CycleData *pointer, bool force_to_0, Thread *current_thread);
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INLINE void increment_write(CycleData *pointer) const;
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INLINE void release_write(CycleData *pointer);
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INLINE int get_num_stages();
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INLINE const CycleData *read_stage_unlocked(int pipeline_stage) const;
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INLINE const CycleData *read_stage(int pipeline_stage, Thread *current_thread) const;
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INLINE void release_read_stage(int pipeline_stage, const CycleData *pointer) const;
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INLINE CycleData *write_stage(int pipeline_stage, Thread *current_thread);
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INLINE CycleData *write_stage_upstream(int pipeline_stage, bool force_to_0, Thread *current_thread);
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INLINE CycleData *elevate_read_stage(int pipeline_stage, const CycleData *pointer, Thread *current_thread);
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INLINE CycleData *elevate_read_stage_upstream(int pipeline_stage, const CycleData *pointer,
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bool force_to_0, Thread *current_thread);
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INLINE void release_write_stage(int pipeline_stage, CycleData *pointer);
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INLINE TypeHandle get_parent_type() const;
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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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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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short _locked;
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};
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#include "pipelineCyclerDummyImpl.I"
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#endif // DO_PIPELINING && !HAVE_THREADS
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#endif
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