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author | Jason Lowe-Power <jason@lowepower.com> | 2017-10-06 14:27:37 -0700 |
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committer | Jason Lowe-Power <jason@lowepower.com> | 2017-12-05 02:09:25 +0000 |
commit | 25daea0e6fd12b8ce3c282b49b3fd334d1871975 (patch) | |
tree | 595787ef9cce585d6010ac0506202b3e8189a79a /src/learning_gem5/part2/goodbye_object.cc | |
parent | afaaf483fd06ecda6f5118657a9007a7590edfa5 (diff) | |
download | gem5-25daea0e6fd12b8ce3c282b49b3fd334d1871975.tar.xz |
learning_gem5: Add code for hello-goodbye example
Adding more code from Learning gem5 Part II
See http://learning.gem5.org/book/part2/parameters.html
Change-Id: I9fe5655239e011c718c5cf5fd62bebcda66ea966
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/5021
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Diffstat (limited to 'src/learning_gem5/part2/goodbye_object.cc')
-rw-r--r-- | src/learning_gem5/part2/goodbye_object.cc | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/learning_gem5/part2/goodbye_object.cc b/src/learning_gem5/part2/goodbye_object.cc new file mode 100644 index 000000000..3eaa5adb6 --- /dev/null +++ b/src/learning_gem5/part2/goodbye_object.cc @@ -0,0 +1,103 @@ +/* + * 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); +} |