src/learning_gem5/part2/goodbye_object.hh

/*
 * Copyright (c) 2017 Jason Lowe-Power
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * 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;
 * neither the name of the copyright holders 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
 * OWNER 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.
 */

#ifndef __LEARNING_GEM5_GOODBYE_OBJECT_HH__
#define __LEARNING_GEM5_GOODBYE_OBJECT_HH__

#include <string>

#include "params/GoodbyeObject.hh"
#include "sim/sim_object.hh"

namespace gem5
{

class GoodbyeObject : public SimObject
{
  private:
    /**
     * Fill the buffer with the next chunk of data
     */
    void processEvent();

    /// An event that wraps the above function
    EventFunctionWrapper event;

    /**
     * Fills the buffer for one iteration. If the buffer isn't full, this
     * function will enqueue another event to continue filling.
     */
    void fillBuffer();

    /// The bytes processed per tick
    float bandwidth;

    /// The size of the buffer we are going to fill
    int bufferSize;

    /// The buffer we are putting our message in
    char *buffer;

    /// The message to put into the buffer.
    std::string message;

    /// The amount of the buffer we've used so far.
    int bufferUsed;

  public:
    GoodbyeObject(const GoodbyeObjectParams &p);
    ~GoodbyeObject();

    /**
     * Called by an outside object. Starts off the events to fill the buffer
     * with a goodbye message.
     *
     * @param name the name of the object we are saying goodbye to.
     */
    void sayGoodbye(std::string name);
};

} // namespace gem5

#endif // __LEARNING_GEM5_GOODBYE_OBJECT_HH__