270 lines
10 KiB
Plaintext
270 lines
10 KiB
Plaintext
// Filename: cycleDataWriter.I
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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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#ifdef DO_PIPELINING
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// This is the implementation for full support of pipelining (as well
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// as the sanity-check only implementation).
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Constructor (full)
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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CycleDataWriter(PipelineCycler<CycleDataType> &cycler) :
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_cycler(&cycler)
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{
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_pointer = _cycler->write();
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Copy Constructor (full)
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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CycleDataWriter(const CycleDataWriter<CycleDataType> ©) :
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_cycler(copy._cycler),
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_pointer(copy._pointer)
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{
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nassertv(_pointer != (CycleDataType *)NULL);
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_cycler->increment_write(_pointer);
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Copy Assigment (full)
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE void CycleDataWriter<CycleDataType>::
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operator = (const CycleDataWriter<CycleDataType> ©) {
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_cycler = copy._cycler;
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_pointer = copy._pointer;
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nassertv(_pointer != (CycleDataType *)NULL);
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_cycler->increment_write(_pointer);
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Constructor (full)
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// Access: Public
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// Description: This is a lot like a copy constructor, in that the
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// new CycleDataWriter object gets a handle to the same
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// pointer held by the old CycleDataWriter object.
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// However, since only one write pointer may be active
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// at a time, this invalidates the old object.
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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CycleDataWriter(PipelineCycler<CycleDataType> &cycler,
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CycleDataWriter<CycleDataType> &take_from) :
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_cycler(&cycler),
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_pointer(take_from._pointer)
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{
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take_from._pointer = (CycleDataType *)NULL;
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nassertv(_pointer != (CycleDataType *)NULL);
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Constructor (full)
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// Access: Public
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// Description: This flavor of the constructor elevates the pointer
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// from the CycleDataReader from a read to a write
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// pointer (and invalidates the reader).
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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CycleDataWriter(PipelineCycler<CycleDataType> &cycler,
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CycleDataReader<CycleDataType> &take_from) :
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_cycler(&cycler)
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{
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_pointer = _cycler->elevate_read(take_from.take_pointer());
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Destructor (full)
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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~CycleDataWriter() {
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if (_pointer != (CycleDataType *)NULL) {
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_cycler->release_write(_pointer);
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::operator -> (full)
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// Access: Public
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// Description: This provides an indirect member access to the actual
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// CycleData data.
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataType *CycleDataWriter<CycleDataType>::
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operator -> () {
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nassertr(_pointer != (CycleDataType *)NULL, _cycler->cheat());
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return _pointer;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::operator -> (full)
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// Access: Public
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// Description: This provides an indirect member access to the actual
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// CycleData data.
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE const CycleDataType *CycleDataWriter<CycleDataType>::
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operator -> () const {
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nassertr(_pointer != (CycleDataType *)NULL, _cycler->cheat());
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return _pointer;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Typecast pointer (full)
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// Access: Public
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// Description: This allows the CycleDataWriter to be passed to any
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// function that expects a CycleDataType pointer.
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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operator CycleDataType * () {
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nassertr(_pointer != (CycleDataType *)NULL, _cycler->cheat());
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return _pointer;
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}
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#else // !DO_PIPELINING
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// This is the trivial, do-nothing implementation.
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Constructor (trivial)
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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CycleDataWriter(PipelineCycler<CycleDataType> &cycler) {
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_pointer = cycler.write();
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Copy Constructor (trivial)
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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CycleDataWriter(const CycleDataWriter<CycleDataType> ©) :
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_pointer(copy._pointer)
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{
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Copy Assigment (trivial)
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE void CycleDataWriter<CycleDataType>::
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operator = (const CycleDataWriter<CycleDataType> ©) {
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_pointer = copy._pointer;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Constructor (trivial)
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// Access: Public
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// Description: This is a lot like a copy constructor, in that the
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// new CycleDataWriter object gets a handle to the same
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// pointer held by the old CycleDataWriter object.
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// However, since only one write pointer may be active
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// at a time, this invalidates the old object.
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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CycleDataWriter(PipelineCycler<CycleDataType> &,
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CycleDataWriter<CycleDataType> &take_from) :
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_pointer(take_from.take_pointer())
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{
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Constructor (trivial)
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// Access: Public
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// Description: This flavor of the constructor elevates the pointer
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// from the CycleDataReader from a read to a write
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// pointer (and invalidates the reader).
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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CycleDataWriter(PipelineCycler<CycleDataType> &,
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CycleDataReader<CycleDataType> &take_from) :
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_pointer((CycleDataType *)take_from.take_pointer())
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{
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Destructor (trivial)
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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~CycleDataWriter() {
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::operator -> (trivial)
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// Access: Public
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// Description: This provides an indirect member access to the actual
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// CycleData data.
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataType *CycleDataWriter<CycleDataType>::
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operator -> () {
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return _pointer;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::operator -> (trivial)
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// Access: Public
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// Description: This provides an indirect member access to the actual
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// CycleData data.
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE const CycleDataType *CycleDataWriter<CycleDataType>::
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operator -> () const {
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return _pointer;
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}
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////////////////////////////////////////////////////////////////////
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// Function: CycleDataWriter::Typecast pointer (trivial)
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// Access: Public
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// Description: This allows the CycleDataWriter to be passed to any
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// function that expects a CycleDataType pointer.
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////////////////////////////////////////////////////////////////////
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template<class CycleDataType>
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INLINE CycleDataWriter<CycleDataType>::
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operator CycleDataType * () {
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return _pointer;
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}
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#endif // DO_PIPELINING
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