mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
147 lines
3.9 KiB
C++
147 lines
3.9 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 2014-2020, 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.h>
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#include <villas/plugin.h>
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#include <villas/node/config.h>
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#include <villas/nodes/loopback_internal.hpp>
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#include <villas/exceptions.hpp>
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#include <villas/memory.h>
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using namespace villas;
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using namespace villas::utils;
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static struct plugin p;
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int loopback_internal_init(struct vnode *n)
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{
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struct loopback_internal *l = (struct loopback_internal *) n->_vd;
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l->queuelen = DEFAULT_QUEUE_LENGTH;
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return 0;
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}
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int loopback_internal_prepare(struct vnode *n)
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{
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int ret;
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struct loopback_internal *l = (struct loopback_internal *) n->_vd;
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ret = signal_list_copy(&n->in.signals, &l->source->in.signals);
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if (ret)
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return -1;
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return queue_signalled_init(&l->queue, l->queuelen, memory_default, QueueSignalledMode::EVENTFD);
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}
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int loopback_internal_destroy(struct vnode *n)
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{
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struct loopback_internal *l= (struct loopback_internal *) n->_vd;
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return queue_signalled_destroy(&l->queue);
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}
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int loopback_internal_read(struct vnode *n, struct sample *smps[], unsigned cnt, unsigned *release)
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{
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int avail;
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struct loopback_internal *l = (struct loopback_internal *) n->_vd;
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struct sample *cpys[cnt];
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avail = queue_signalled_pull_many(&l->queue, (void **) cpys, cnt);
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for (int i = 0; i < avail; i++) {
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sample_copy(smps[i], cpys[i]);
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sample_decref(cpys[i]);
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}
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return avail;
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}
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int loopback_internal_write(struct vnode *n, struct sample *smps[], unsigned cnt, unsigned *release)
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{
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struct loopback_internal *l = (struct loopback_internal *) n->_vd;
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sample_incref_many(smps, cnt);
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return queue_signalled_push_many(&l->queue, (void **) smps, cnt);
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}
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int loopback_internal_poll_fds(struct vnode *n, int fds[])
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{
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struct loopback_internal *l = (struct loopback_internal *) n->_vd;
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fds[0] = queue_signalled_fd(&l->queue);
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return 1;
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}
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struct vnode * loopback_internal_create(struct vnode *orig)
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{
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int ret;
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struct vnode *n;
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struct loopback_internal *l;
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n = new struct vnode;
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if (!n)
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throw MemoryAllocationError();
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ret = node_init(n, &p.node);
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if (ret)
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return nullptr;
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l = (struct loopback_internal *) n->_vd;
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l->source = orig;
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asprintf(&n->name, "%s_lo%zu", node_name_short(orig), vlist_length(&orig->sources));
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return n;
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}
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__attribute__((constructor(110)))
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static void register_plugin() {
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p.name = "loopback_internal";
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p.description = "internal loopback to connect multiple paths";
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p.type = PluginType::NODE;
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p.node.instances.state = State::DESTROYED;
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p.node.vectorize = 0;
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p.node.flags = (int) NodeFlags::PROVIDES_SIGNALS | (int) NodeFlags::INTERNAL;
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p.node.size = sizeof(struct loopback_internal);
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p.node.prepare = loopback_internal_prepare;
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p.node.init = loopback_internal_init;
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p.node.destroy = loopback_internal_destroy;
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p.node.read = loopback_internal_read;
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p.node.write = loopback_internal_write;
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p.node.poll_fds = loopback_internal_poll_fds;
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int ret = vlist_init(&p.node.instances);
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if (!ret)
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vlist_init_and_push(&plugins, &p);
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}
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__attribute__((destructor(110)))
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static void deregister_plugin() {
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vlist_remove_all(&plugins, &p);
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}
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