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/*
* \file ocsd_gen_elem_stack.h
* \brief OpenCSD : Generic element output stack.
*
* \copyright Copyright (c) 2016, ARM Limited. All Rights Reserved.
*/
/*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <list>
#include "trc_gen_elem.h"
#include "comp_attach_pt_t.h"
#include "interfaces/trc_gen_elem_in_i.h"
/*!
* @class OcsdGenElemList
* @brief Maintain a list of elements to be output
*
* Each incoming packet can result in multiple output elements.
* These are stacked in this class prior to entering the output phase of processing.
*
* This should remove some of the requirement on the packet processing to be re-enterant,
* simplifying this code.
*
* Last element(s) on this stack can be marked pending to allow for later cancellation.
* (This required for cancel element in ETMv3 exeception branch).
*
* The "list" is actually a ring buffer - maintaining pointers to indicate current valid elements.
* This buffer can increase on demand, but will only be released at the end of a decode session.
*/
class OcsdGenElemList
{
public:
OcsdGenElemList();
~OcsdGenElemList();
void initSendIf(componentAttachPt<ITrcGenElemIn> *pGenElemIf);
void initCSID(const uint8_t CSID) { m_CSID = CSID; };
void reset(); //!< reset the element list.
OcsdTraceElement *getNextElem(const ocsd_trc_index_t trc_pkt_idx); //!< get next free element on the stack (add one to the output)
const int getNumElem() const; //!< return the total number of elements on the stack (inlcuding any pended ones).
const ocsd_gen_trc_elem_t getElemType(const int entryN) const; //!< get the type for the nth element in the stack (0 indexed)
void pendLastNElem(int numPend); //!< Last element to be pended prior to cancel/commit decision.
void commitAllPendElem(); //!< commit all pended elements.
void cancelPendElem(); //!< cancel the last pended element on the stack.
const int numPendElem() const; //!< return the number of pended elements.
/*! Send all of the none pended elements
Stop sending when all sent or _CONT response.
*/
ocsd_datapath_resp_t sendElements();
const bool elemToSend() const; //!< true if any none-pending elements left to send.
private:
void growArray();
const int getAdjustedIdx(int idxIn) const; //!< get adjusted index into circular buffer.
// list element contains pointer and byte index in trace stream
typedef struct _elemPtr {
OcsdTraceElement *pElem; //!< pointer to the listed trace element
ocsd_trc_index_t trc_pkt_idx; //!< packet index in the trace stream
} elemPtr_t;
elemPtr_t *m_pElemArray; //!< an array of pointers to elements.
int m_elemArraySize; //!< number of element pointers in the array
int m_firstElemIdx; //!< internal index in array of first element in use.
int m_numUsed; //!< number of elements in use
int m_numPend; //!< internal count of pended elements.
uint8_t m_CSID;
componentAttachPt<ITrcGenElemIn> *m_sendIf; //!< element send interface.
};
inline const int OcsdGenElemList::getAdjustedIdx(int idxIn) const
{
if(idxIn >= m_elemArraySize)
idxIn -= m_elemArraySize;
return idxIn;
}
inline const int OcsdGenElemList::getNumElem() const
{
return m_numUsed;
}
inline const int OcsdGenElemList::numPendElem() const
{
return m_numPend;
}
inline void OcsdGenElemList::pendLastNElem(int numPend)
{
if(numPend >= getNumElem())
m_numPend = numPend;
}
inline void OcsdGenElemList::commitAllPendElem()
{
m_numPend = 0;
}
inline void OcsdGenElemList::cancelPendElem()
{
if(m_numPend > 0)
{
m_numUsed -= m_numPend;
}
}
inline const bool OcsdGenElemList::elemToSend() const
{
return ((getNumElem() - m_numPend) > 0);
}
inline void OcsdGenElemList::initSendIf(componentAttachPt<ITrcGenElemIn> *pGenElemIf)
{
m_sendIf = pGenElemIf;
}
/* End of File ocsd_gen_elem_stack.h */
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