Files
DRAMSys/DRAMSys/library/src/controller/cmdmux/CmdMuxOldest.cpp
2020-09-25 11:36:22 +02:00

67 lines
2.5 KiB
C++

/*
* Copyright (c) 2019, Technische Universität Kaiserslautern
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the copyright holder 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 HOLDER
* 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.
*
* Author: Lukas Steiner
*/
#include "CmdMuxOldest.h"
#include "../../common/dramExtensions.h"
using namespace tlm;
CommandTuple::Type CmdMuxOldest::selectCommand(ReadyCommands &readyCommands)
{
auto result = readyCommands.cend();
auto it = readyCommands.cbegin();
uint64_t lastPayloadID = UINT64_MAX;
uint64_t newPayloadID = 0;
while (it != readyCommands.cend())
{
if (std::get<CommandTuple::Timestamp>(*it) == sc_time_stamp())
{
newPayloadID = DramExtension::getPayloadID(std::get<CommandTuple::Payload>(*it));
if (newPayloadID < lastPayloadID)
{
lastPayloadID = newPayloadID;
result = it;
}
}
it++;
}
if (lastPayloadID != UINT64_MAX)
return *result;
else
return CommandTuple::Type(Command::NOP, nullptr, sc_max_time());
}