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/**
* Copyright (C) ARM Limited 2013-2016. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef DRIVER_H
#define DRIVER_H
#include <stdint.h>
#include "mxml/mxml.h"
class Buffer;
class Counter;
class DriverCounter {
public:
DriverCounter(DriverCounter *const next, const char *const name);
virtual ~DriverCounter();
DriverCounter *getNext() const { return mNext; }
const char *getName() const { return mName; }
int getKey() const { return mKey; }
bool isEnabled() const { return mEnabled; }
void setEnabled(const bool enabled) { mEnabled = enabled; }
virtual int64_t read() { return -1; }
private:
DriverCounter *const mNext;
const char *const mName;
const int mKey;
bool mEnabled;
// Intentionally unimplemented
DriverCounter(const DriverCounter &);
DriverCounter &operator=(const DriverCounter &);
};
class Driver {
public:
static Driver *getHead() { return head; }
virtual ~Driver();
// Returns true if this driver can manage the counter
virtual bool claimCounter(const Counter &counter) const = 0;
// Clears and disables all counters
virtual void resetCounters() = 0;
// Enables and prepares the counter for capture
virtual void setupCounter(Counter &counter) = 0;
// Performs any actions needed for setup or based on eventsXML
virtual void readEvents(mxml_node_t *const) {}
// Emits available counters
virtual int writeCounters(mxml_node_t *const root) const = 0;
// Emits possible dynamically generated events/counters
virtual void writeEvents(mxml_node_t *const) const {}
Driver *getNext() const { return next; }
protected:
Driver();
private:
static Driver *head;
Driver *next;
// Intentionally unimplemented
Driver(const Driver &);
Driver &operator=(const Driver &);
};
class SimpleDriver : public Driver {
public:
virtual ~SimpleDriver();
bool claimCounter(const Counter &counter) const;
bool countersEnabled() const;
void resetCounters();
void setupCounter(Counter &counter);
int writeCounters(mxml_node_t *root) const;
protected:
SimpleDriver() : mCounters(NULL) {}
DriverCounter *getCounters() const { return mCounters; }
void setCounters(DriverCounter *const counter) { mCounters = counter; }
DriverCounter *findCounter(const Counter &counter) const;
private:
DriverCounter *mCounters;
// Intentionally unimplemented
SimpleDriver(const SimpleDriver &);
SimpleDriver &operator=(const SimpleDriver &);
};
class PolledDriver : public SimpleDriver {
public:
virtual ~PolledDriver();
virtual void start() {}
virtual void read(Buffer *const buffer);
protected:
PolledDriver() {}
private:
// Intentionally unimplemented
PolledDriver(const PolledDriver &);
PolledDriver &operator=(const PolledDriver &);
};
#endif // DRIVER_H
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