mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
/** Test "client" for the shared memory interface.
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*
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* Waits on the incoming queue, prints received samples and writes them
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* back to the other queue.
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*
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* @author Georg Martin Reinke <georg.reinke@rwth-aachen.de>
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* @copyright 2017-2018, 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 <string.h>
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#include <iostream>
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#include <atomic>
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#include <villas/node/config.h>
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#include <villas/log.hpp>
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#include <villas/exceptions.hpp>
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#include <villas/node.h>
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#include <villas/pool.h>
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#include <villas/sample.h>
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#include <villas/shmem.h>
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#include <villas/utils.h>
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#include <villas/utils.hpp>
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using namespace villas;
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static Logger logger = logging.get("test-shmem");
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static std::atomic<bool> stop(false);
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void usage()
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{
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std::cout << "Usage: villas-test-shmem WNAME VECTORIZE" << std::endl
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<< " WNAME name of the shared memory object for the output queue" << std::endl
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<< " RNAME name of the shared memory object for the input queue" << std::endl
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<< " VECTORIZE maximum number of samples to read/write at a time" << std::endl;
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}
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void quit(int, siginfo_t*, void*)
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{
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stop = true;
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}
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int main(int argc, char* argv[])
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{
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int ret, readcnt, writecnt, avail;
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struct shmem_int shm;
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struct shmem_conf conf = {
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.polling = 0,
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.queuelen = DEFAULT_SHMEM_QUEUELEN,
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.samplelen = DEFAULT_SHMEM_SAMPLELEN
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};
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if (argc != 4) {
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usage();
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return 1;
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}
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ret = utils::signals_init(quit);
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if (ret)
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throw RuntimeError("Failed to initialize signals");
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char *wname = argv[1];
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char *rname = argv[2];
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int vectorize = atoi(argv[3]);
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ret = shmem_int_open(wname, rname, &shm, &conf);
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if (ret < 0)
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throw RuntimeError("Failed to open shared-memory interface");
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struct sample *insmps[vectorize], *outsmps[vectorize];
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while (!stop) {
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readcnt = shmem_int_read(&shm, insmps, vectorize);
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if (readcnt == -1) {
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logger->info("Node stopped, exiting");
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break;
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}
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avail = shmem_int_alloc(&shm, outsmps, readcnt);
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if (avail < readcnt)
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logger->warn("Pool underrun: %d / %d\n", avail, readcnt);
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for (int i = 0; i < avail; i++) {
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outsmps[i]->sequence = insmps[i]->sequence;
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outsmps[i]->ts = insmps[i]->ts;
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int len = MIN(insmps[i]->length, outsmps[i]->capacity);
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memcpy(outsmps[i]->data, insmps[i]->data, SAMPLE_DATA_LENGTH(len));
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outsmps[i]->length = len;
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}
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for (int i = 0; i < readcnt; i++)
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sample_decref(insmps[i]);
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writecnt = shmem_int_write(&shm, outsmps, avail);
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if (writecnt < avail)
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logger->warn("Short write");
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logger->info("Read / Write: {}/{}", readcnt, writecnt);
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}
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ret = shmem_int_close(&shm);
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if (ret)
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throw RuntimeError("Failed to close shared-memory interface");
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logger->info(CLR_GRN("Goodbye!"));
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return 0;
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}
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