2016-06-08 22:26:40 +02:00
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/** The internal datastructure for a sample of simulation data.
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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2020-01-20 17:17:00 +01:00
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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2017-04-27 12:56:43 +02:00
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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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2017-05-05 19:24:16 +00:00
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*
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2017-04-27 12:56:43 +02:00
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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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2017-05-05 19:24:16 +00:00
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*
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2017-04-27 12:56:43 +02:00
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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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2017-03-03 20:20:13 -04:00
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*********************************************************************************/
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2016-06-08 22:26:40 +02:00
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2017-02-16 09:04:12 -03:00
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#pragma once
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2016-06-08 22:26:40 +02:00
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2019-04-23 13:05:31 +02:00
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#include <atomic>
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2019-06-23 16:57:00 +02:00
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#include <cstddef>
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#include <cstdlib>
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#include <cstdio>
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#include <ctime>
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2016-06-08 22:26:40 +02:00
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2021-02-16 14:15:14 +01:00
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#include <villas/log.hpp>
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2018-08-06 11:24:49 +02:00
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#include <villas/signal.h>
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2016-09-10 22:16:23 -04:00
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/* Forward declarations */
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struct pool;
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2016-06-08 22:26:40 +02:00
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/** The length of a sample datastructure with \p values values in bytes. */
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2018-08-02 10:38:54 +02:00
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#define SAMPLE_LENGTH(len) (sizeof(struct sample) + SAMPLE_DATA_LENGTH(len))
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2016-06-08 22:26:40 +02:00
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/** The length of a sample data portion of a sample datastructure with \p values values in bytes. */
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2018-08-02 10:38:54 +02:00
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#define SAMPLE_DATA_LENGTH(len) ((len) * sizeof(double))
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2016-06-08 22:26:40 +02:00
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2018-10-11 14:18:30 +02:00
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/** The number of values in a sample datastructure. */
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#define SAMPLE_NUMBER_OF_VALUES(len) ((len) / sizeof(double))
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2016-06-08 22:26:40 +02:00
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/** The offset to the beginning of the data section. */
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2016-07-11 18:19:23 +02:00
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#define SAMPLE_DATA_OFFSET(smp) ((char *) (smp) + offsetof(struct sample, data))
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2016-06-08 22:26:40 +02:00
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2017-09-04 14:28:55 +02:00
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/** Parts of a sample that can be serialized / de-serialized by the IO formats */
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2019-06-23 16:13:23 +02:00
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enum class SampleFlags {
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HAS_TS_ORIGIN = (1 << 0), /**< Include origin timestamp in output. */
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HAS_TS_RECEIVED = (1 << 1), /**< Include receive timestamp in output. */
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HAS_OFFSET = (1 << 2), /**< Include offset (received - origin timestamp) in output. */
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HAS_SEQUENCE = (1 << 3), /**< Include sequence number in output. */
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HAS_DATA = (1 << 4), /**< Include values in output. */
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2021-02-22 23:16:53 +01:00
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HAS_TS = HAS_TS_ORIGIN | HAS_TS_RECEIVED, /**< Include origin timestamp in output. */
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2019-06-23 16:13:23 +02:00
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HAS_ALL = (1 << 5) - 1, /**< Enable all output options. */
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IS_FIRST = (1 << 16), /**< This sample is the first of a new simulation case */
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IS_LAST = (1 << 17) /**< This sample is the last of a running simulation case */
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2017-09-04 14:28:55 +02:00
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};
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2016-06-08 22:26:40 +02:00
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struct sample {
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2018-07-21 13:01:42 +02:00
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uint64_t sequence; /**< The sequence number of this sample. */
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2019-03-26 07:11:45 +01:00
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unsigned length; /**< The number of values in sample::values which are valid. */
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unsigned capacity; /**< The number of values in sample::values for which memory is reserved. */
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2017-09-16 15:04:59 +02:00
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int flags; /**< Flags are used to store binary properties of a sample. */
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2017-09-04 14:28:55 +02:00
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2019-01-07 10:28:55 +01:00
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struct vlist *signals; /**< The list of signal descriptors. */
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2017-05-05 19:24:16 +00:00
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2019-04-23 13:05:31 +02:00
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std::atomic<int> refcnt; /**< Reference counter. */
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2018-05-08 11:41:43 +02:00
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ptrdiff_t pool_off; /**< This sample belongs to this memory pool (relative pointer). See sample_pool(). */
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2017-09-16 15:04:59 +02:00
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2016-06-08 22:26:40 +02:00
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/** All timestamps are seconds / nano seconds after 1.1.1970 UTC */
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struct {
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struct timespec origin; /**< The point in time when this data was sampled. */
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struct timespec received; /**< The point in time when this data was received. */
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} ts;
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2017-05-05 19:24:16 +00:00
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2018-08-13 15:31:39 +02:00
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/** The sample signal values.
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*
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* This variable length array (VLA) extends over the end of struct sample.
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* Make sure that pointers to struct sample point to memory blocks of adequate size.
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* Use the SAMPLE_LENGTH() macro to calculate the required size.
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*
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* Metadata describing the details of signal values (such as name, unit, data type and more)
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* are stored in the struct sample::signals list. Each entry in this list corresponedents
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* to an entry in the struct sample::data array.
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*/
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union signal_data data[];
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2016-06-08 22:26:40 +02:00
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};
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2018-05-08 11:43:53 +02:00
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#define SAMPLE_NON_POOL PTRDIFF_MIN
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2017-09-16 15:04:59 +02:00
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/** Get the address of the pool to which the sample belongs. */
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2019-06-23 16:58:28 +02:00
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#define sample_pool(s) ((s)->pool_off == SAMPLE_NON_POOL ? nullptr : (struct pool *) ((char *) (s) + (s)->pool_off))
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2017-08-30 23:50:57 +02:00
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2017-10-16 08:08:17 +02:00
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struct sample * sample_alloc(struct pool *p);
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2018-05-08 11:43:53 +02:00
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struct sample * sample_alloc_mem(int capacity);
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2017-10-16 08:08:17 +02:00
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struct sample * sample_clone(struct sample *smp);
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void sample_free(struct sample *s);
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2016-10-22 20:47:36 -04:00
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/** Request \p cnt samples from memory pool \p p and initialize them.
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2017-05-12 11:35:21 +02:00
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* The reference count will already be set to 1.
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2018-08-07 09:22:26 +02:00
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* Use the sample_incref() function to increase it. */
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2017-10-16 08:08:17 +02:00
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int sample_alloc_many(struct pool *p, struct sample *smps[], int cnt);
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2016-10-22 20:47:36 -04:00
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/** Release an array of samples back to their pools */
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2017-10-16 08:08:17 +02:00
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void sample_free_many(struct sample *smps[], int cnt);
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2016-09-10 22:16:23 -04:00
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2016-08-28 23:57:11 -04:00
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/** Increase reference count of sample */
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2018-08-07 09:22:26 +02:00
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int sample_incref(struct sample *s);
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2016-08-28 23:57:11 -04:00
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/** Decrease reference count and release memory if last reference was held. */
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2018-08-07 09:22:26 +02:00
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int sample_decref(struct sample *s);
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2016-08-28 23:57:11 -04:00
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2017-04-07 17:46:50 +02:00
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int sample_copy(struct sample *dst, struct sample *src);
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2019-01-23 00:49:28 +01:00
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/** Dump all details about a sample to debug log */
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2021-02-16 14:15:14 +01:00
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void sample_dump(villas::Logger logger, struct sample *s);
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2019-01-23 00:49:28 +01:00
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2017-09-04 16:19:43 +02:00
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/** Compare two samples */
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int sample_cmp(struct sample *a, struct sample *b, double epsilon, int flags);
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2017-10-16 08:08:17 +02:00
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int sample_clone_many(struct sample *clones[], struct sample *origs[], int cnt);
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2017-04-07 17:46:50 +02:00
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int sample_copy_many(struct sample *dsts[], struct sample *srcs[], int cnt);
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2018-08-07 09:22:26 +02:00
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int sample_incref_many(struct sample *smps[], int cnt);
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int sample_decref_many(struct sample *smps[], int cnt);
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2017-04-07 17:46:50 +02:00
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2019-06-23 16:13:23 +02:00
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enum SignalType sample_format(const struct sample *s, unsigned idx);
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2018-08-06 11:26:25 +02:00
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2019-03-08 15:21:46 +01:00
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void sample_data_insert(struct sample *smp, const union signal_data *src, size_t offset, size_t len);
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void sample_data_remove(struct sample *smp, size_t offset, size_t len);
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