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+/*
+ * 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.
+ *
+ * Authors: Jason Lowe-Power
+ */
+
+#include "learning_gem5/part2/goodbye_object.hh"
+
+#include "debug/HelloExample.hh"
+#include "sim/sim_exit.hh"
+
+GoodbyeObject::GoodbyeObject(GoodbyeObjectParams *params) :
+ SimObject(params), event([this]{ processEvent(); }, name() + ".event"),
+ bandwidth(params->write_bandwidth), bufferSize(params->buffer_size),
+ buffer(nullptr), bufferUsed(0)
+{
+ buffer = new char[bufferSize];
+ DPRINTF(HelloExample, "Created the goodbye object\n");
+}
+
+GoodbyeObject::~GoodbyeObject()
+{
+ delete[] buffer;
+}
+
+void
+GoodbyeObject::processEvent()
+{
+ DPRINTF(HelloExample, "Processing the event!\n");
+
+ // Actually do the "work" of the event
+ fillBuffer();
+}
+
+void
+GoodbyeObject::sayGoodbye(std::string other_name)
+{
+ DPRINTF(HelloExample, "Saying goodbye to %s\n", other_name);
+
+ message = "Goodbye " + other_name + "!! ";
+
+ // Kick off the the first buffer fill. If it can't fill the whole buffer
+ // because of a limited bandwidth, then this function will schedule another
+ // event to finish the fill
+ fillBuffer();
+}
+
+void
+GoodbyeObject::fillBuffer()
+{
+ // There better be a message
+ 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(HelloExample, "Scheduling another fillBuffer in %d ticks\n",
+ bandwidth * bytes_copied);
+ schedule(event, curTick() + bandwidth * bytes_copied);
+ } else {
+ DPRINTF(HelloExample, "Goodbye done copying!\n");
+ // Be sure to take into account the time for the last bytes
+ exitSimLoop(buffer, 0, curTick() + bandwidth * bytes_copied);
+ }
+}
+
+GoodbyeObject*
+GoodbyeObjectParams::create()
+{
+ return new GoodbyeObject(this);
+}