neuron/src/adapter/driver/cache.h at 4174f3eee41631db92a581b0838f4a3657d4e725 · hxy7yx/neuron · GitHub

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/**
 * NEURON IIoT System for Industry 4.0
 * Copyright (C) 2020-2021 EMQ Technologies Co., Ltd All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 **/

#ifndef _NEU_DRIVER_CACHE_H_
#define _NEU_DRIVER_CACHE_H_

#include <stdint.h>

#include "type.h"

typedef struct neu_driver_cache neu_driver_cache_t;

neu_driver_cache_t *neu_driver_cache_new();
void                neu_driver_cache_destroy(neu_driver_cache_t *cache);

void neu_driver_cache_add(neu_driver_cache_t *cache, const char *group,
                          const char *tag, neu_dvalue_t value);
void neu_driver_cache_update(neu_driver_cache_t *cache, const char *group,
                             const char *tag, int64_t timestamp,
                             neu_dvalue_t value, neu_tag_meta_t *metas,
                             int n_meta);
bool neu_driver_cache_update_change(neu_driver_cache_t *cache,
                                    const char *group, const char *tag,
                                    int64_t timestamp, neu_dvalue_t value,
                                    neu_tag_meta_t *metas, int n_meta,
                                    bool change);

void neu_driver_cache_del(neu_driver_cache_t *cache, const char *group,
                          const char *tag);
void neu_driver_cache_rename(neu_driver_cache_t *cache, const char *group,
                             const char *old_tag, const char *new_tag);

void neu_driver_cache_update_trace(neu_driver_cache_t *cache, const char *group,
                                   void *trace_ctx);

void *neu_driver_cache_get_trace(neu_driver_cache_t *cache, const char *group);

typedef struct {
    neu_dvalue_t value;
    int64_t      timestamp;
} neu_driver_cache_value_t;

int neu_driver_cache_meta_get(neu_driver_cache_t *cache, const char *group,
                              const char *tag, neu_driver_cache_value_t *value,
                              neu_tag_meta_t **metas, int *n_meta);
int neu_driver_cache_meta_get_changed(neu_driver_cache_t *cache,
                                      const char *group, const char *tag,
                                      neu_driver_cache_value_t *value,
                                      neu_tag_meta_t **metas, int *n_meta);

#endif