242 lines
5.8 KiB
Text
242 lines
5.8 KiB
Text
/**
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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 cycleDataLockedReader.I
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* @author drose
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* @date 2006-04-30
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*/
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#ifndef CPPPARSER
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#ifdef DO_PIPELINING
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// This is the implementation for full support of pipelining (as well as the
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// sanity-check only implementation).
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/**
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*
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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CycleDataLockedReader(const PipelineCycler<CycleDataType> &cycler,
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Thread *current_thread) :
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_cycler(&cycler),
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_current_thread(current_thread)
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{
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_pointer = _cycler->read(_current_thread);
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nassertv(_pointer != nullptr);
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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CycleDataLockedReader(const CycleDataLockedReader<CycleDataType> ©) :
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_cycler(copy._cycler),
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_current_thread(copy._current_thread),
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_pointer(copy._pointer)
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{
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nassertv(_pointer != nullptr);
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_cycler->increment_read(_pointer);
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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CycleDataLockedReader(CycleDataLockedReader<CycleDataType> &&from) noexcept :
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_cycler(from._cycler),
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_current_thread(from._current_thread),
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_pointer(from._pointer)
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{
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from._pointer = nullptr;
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE void CycleDataLockedReader<CycleDataType>::
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operator = (const CycleDataLockedReader<CycleDataType> ©) {
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nassertv(_pointer == nullptr);
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nassertv(_current_thread == copy._current_thread);
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_cycler = copy._cycler;
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_pointer = copy._pointer;
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nassertv(_pointer != nullptr);
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_cycler->increment_read(_pointer);
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE void CycleDataLockedReader<CycleDataType>::
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operator = (CycleDataLockedReader<CycleDataType> &&from) noexcept {
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nassertv(_pointer == nullptr);
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nassertv(_current_thread == from._current_thread);
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_cycler = from._cycler;
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_pointer = from._pointer;
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from._pointer = nullptr;
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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~CycleDataLockedReader() {
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if (_pointer != nullptr) {
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_cycler->release_read(_pointer);
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}
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}
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/**
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* This provides an indirect member access to the actual CycleData data.
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*/
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template<class CycleDataType>
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INLINE const CycleDataType *CycleDataLockedReader<CycleDataType>::
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operator -> () const {
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nassertr(_pointer != nullptr, _cycler->cheat());
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return _pointer;
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}
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/**
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* This allows the CycleDataLockedReader to be passed to any function that
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* expects a const CycleDataType pointer.
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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operator const CycleDataType * () const {
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nassertr(_pointer != nullptr, _cycler->cheat());
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return _pointer;
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}
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/**
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* This is intended to be called only from CycleDataWriter when it elevates
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* the pointer from read to write status. This function returns the reader's
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* pointer and relinquishes ownership of the pointer, rendering the reader
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* invalid for future reads.
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*/
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template<class CycleDataType>
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INLINE const CycleDataType *CycleDataLockedReader<CycleDataType>::
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take_pointer() {
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const CycleDataType *pointer = _pointer;
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_pointer = nullptr;
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nassertr(pointer != nullptr, _cycler->cheat());
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return pointer;
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}
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/**
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* Returns the Thread pointer of the currently-executing thread, as passed to
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* the constructor of this object.
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*/
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template<class CycleDataType>
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INLINE Thread *CycleDataLockedReader<CycleDataType>::
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get_current_thread() const {
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return _current_thread;
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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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*
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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CycleDataLockedReader(const PipelineCycler<CycleDataType> &cycler, Thread *) {
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_pointer = cycler.cheat();
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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CycleDataLockedReader(const CycleDataLockedReader<CycleDataType> ©) :
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_pointer(copy._pointer)
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{
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE void CycleDataLockedReader<CycleDataType>::
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operator = (const CycleDataLockedReader<CycleDataType> ©) {
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_pointer = copy._pointer;
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE void CycleDataLockedReader<CycleDataType>::
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operator = (CycleDataLockedReader<CycleDataType> &&from) noexcept {
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nassertv(_pointer == nullptr);
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_pointer = from._pointer;
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from._pointer = nullptr;
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}
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/**
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*
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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~CycleDataLockedReader() {
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}
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/**
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* This provides an indirect member access to the actual CycleData data.
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*/
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template<class CycleDataType>
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INLINE const CycleDataType *CycleDataLockedReader<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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* This allows the CycleDataLockedReader to be passed to any function that
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* expects a const CycleDataType pointer.
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*/
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template<class CycleDataType>
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INLINE CycleDataLockedReader<CycleDataType>::
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operator const CycleDataType * () const {
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return _pointer;
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}
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/**
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* This is intended to be called only from CycleDataWriter when it elevates
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* the pointer from read to write status. This function returns the reader's
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* pointer and relinquishes ownership of the pointer, rendering the reader
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* invalid for future reads.
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*/
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template<class CycleDataType>
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INLINE const CycleDataType *CycleDataLockedReader<CycleDataType>::
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take_pointer() {
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return _pointer;
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}
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/**
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* Returns the Thread pointer of the currently-executing thread, as passed to
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* the constructor of this object.
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*/
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template<class CycleDataType>
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INLINE Thread *CycleDataLockedReader<CycleDataType>::
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get_current_thread() const {
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return Thread::get_current_thread();
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}
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#endif // DO_PIPELINING
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#endif // CPPPARSER
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