mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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116 lines
3 KiB
C++
116 lines
3 KiB
C++
/** Node-type for internal loopback_internal connections.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2021, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <cstring>
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#include <villas/node/config.hpp>
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#include <villas/nodes/loopback_internal.hpp>
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#include <villas/exceptions.hpp>
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#include <villas/node/memory.hpp>
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#include <villas/uuid.hpp>
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#include <villas/colors.hpp>
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using namespace villas;
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using namespace villas::node;
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static InternalLoopbackNodeFactory nf;
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InternalLoopbackNode::InternalLoopbackNode(Node *src, unsigned id, unsigned ql) :
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Node(fmt::format("{}.lo{}", src->getNameShort(), id)),
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queuelen(ql),
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source(src)
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{
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int ret = uuid::generateFromString(uuid, fmt::format("lo{}", id), src->getUuid());
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if (ret)
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throw RuntimeError("Failed to initialize UUID");
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factory = &nf;
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name_long = fmt::format(CLR_RED("{}") "(" CLR_YEL("{}") ")", name_short, nf.getName());
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auto logger_name = fmt::format("node:{}", getNameShort());
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logger = logging.get(logger_name);
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in.signals = source->getInputSignals(false);
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ret = queue_signalled_init(&queue, queuelen);
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if (ret)
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throw RuntimeError("Failed to initialize queue");
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state = State::PREPARED;
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}
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InternalLoopbackNode::~InternalLoopbackNode()
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{
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int ret __attribute__((unused));
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ret = queue_signalled_destroy(&queue);
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}
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int InternalLoopbackNode::stop()
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{
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int ret;
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ret = queue_signalled_close(&queue);
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if (ret)
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return ret;
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return 0;
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}
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int InternalLoopbackNode::_read(struct Sample * smps[], unsigned cnt)
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{
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int avail;
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struct Sample *cpys[cnt];
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avail = queue_signalled_pull_many(&queue, (void **) cpys, cnt);
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sample_copy_many(smps, cpys, avail);
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sample_decref_many(cpys, avail);
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return avail;
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}
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int InternalLoopbackNode::_write(struct Sample * smps[], unsigned cnt)
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{
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sample_incref_many(smps, cnt);
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int pushed = queue_signalled_push_many(&queue, (void **) smps, cnt);
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if (pushed < 0) {
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sample_decref_many(smps, cnt);
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return pushed;
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}
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/* Released unpushed samples */
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if ((unsigned) pushed < cnt) {
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sample_decref_many(smps + pushed, cnt - pushed);
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logger->warn("Queue overrun");
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}
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return pushed;
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}
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std::vector<int> InternalLoopbackNode::getPollFDs()
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{
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return { queue_signalled_fd(&queue) };
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}
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