向 SimObjects 添加参数和更多事件

HelloObject::HelloObject(const HelloObjectParams &params) :
    SimObject(params),
    event(*this),
    myName(params.name),
    latency(params.time_to_wait),
    timesLeft(params.number_of_fires)
{
    DPRINTF(Hello, "Created the hello object with the name %s\n", myName);
}

class HelloObject : public SimObject
{
  private:
    void processEvent();

    EventWrapper event;

    const std::string myName;

    const Tick latency;

    int timesLeft;

  public:
    HelloObject(HelloObjectParams *p);

    void startup() override;
};

#ifndef __LEARNING_GEM5_GOODBYE_OBJECT_HH__
#define __LEARNING_GEM5_GOODBYE_OBJECT_HH__

#include <string>

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

class GoodbyeObject : public SimObject
{
  private:
    void processEvent();

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

    EventWrapper<GoodbyeObject, &GoodbyeObject::processEvent> event;

    /// 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(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);
};

#endif // __LEARNING_GEM5_GOODBYE_OBJECT_HH__

#include "learning_gem5/part2/goodbye_object.hh"

#include "base/trace.hh"
#include "debug/Hello.hh"
#include "sim/sim_exit.hh"

GoodbyeObject::GoodbyeObject(const GoodbyeObjectParams &params) :
    SimObject(params), event(*this), bandwidth(params.write_bandwidth),
    bufferSize(params.buffer_size), buffer(nullptr), bufferUsed(0)
{
    buffer = new char[bufferSize];
    DPRINTF(Hello, "Created the goodbye object\n");
}

GoodbyeObject::~GoodbyeObject()
{
    delete[] buffer;
}

void
GoodbyeObject::processEvent()
{
    DPRINTF(Hello, "Processing the event!\n");
    fillBuffer();
}

void
GoodbyeObject::sayGoodbye(std::string other_name)
{
    DPRINTF(Hello, "Saying goodbye to %s\n", other_name);

    message = "Goodbye " + other_name + "!! ";

    fillBuffer();
}

void
GoodbyeObject::fillBuffer()
{
    // 最好有一条消息
    assert(message.length() > 0);

    // Copy from the message to the buffer per byte.
    int bytes_copied = 0;
    for (auto it = message.begin();
         it < message.end() && bufferUsed < bufferSize - 1;
         it++, bufferUsed++, bytes_copied++) {
        // Copy the character into the buffer
        buffer[bufferUsed] = *it;
    }

    if (bufferUsed < bufferSize - 1) {
        // Wait for the next copy for as long as it would have taken
        DPRINTF(Hello, "Scheduling another fillBuffer in %d ticks\n",
                bandwidth * bytes_copied);
        schedule(event, curTick() + bandwidth * bytes_copied);
    } else {
        DPRINTF(Hello, "Goodbye done copying!\n");
        // Be sure to take into account the time for the last bytes
        exitSimLoop(buffer, 0, curTick() + bandwidth * bytes_copied);
    }
}

#include <string>

#include "learning_gem5/part2/goodbye_object.hh"
#include "params/HelloObject.hh"
#include "sim/sim_object.hh"

class HelloObject : public SimObject
{
  private:
    void processEvent();

    EventWrapper event;

    /// Pointer to the corresponding GoodbyeObject. Set via Python
    GoodbyeObject* goodbye;

    /// The name of this object in the Python config file
    const std::string myName;

    /// Latency between calling the event (in ticks)
    const Tick latency;

    /// Number of times left to fire the event before goodbye
    int timesLeft;

  public:
    HelloObject(const HelloObjectParams &p);

    void startup() override;
};

#include "learning_gem5/part2/hello_object.hh"

#include "debug/Hello.hh"

HelloObject::HelloObject(HelloObjectParams &params) :
    SimObject(params),
    event(*this),
    goodbye(params.goodbye_object),
    myName(params.name),
    latency(params.time_to_wait),
    timesLeft(params.number_of_fires)
{
    DPRINTF(Hello, "Created the hello object with the name %s\n", myName);
    panic_if(!goodbye, "HelloObject must have a non-null GoodbyeObject");
}

void
HelloObject::processEvent()
{
    timesLeft--;
    DPRINTF(Hello, "Hello world! Processing the event! %d left\n", timesLeft);

    if (timesLeft <= 0) {
        DPRINTF(Hello, "Done firing!\n");
        goodbye->sayGoodbye(myName);
    } else {
        schedule(event, curTick() + latency);
    }
}