Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "zbxcachehistory.h"

​

#include "zbxmutexs.h"

#include "module.h"

#include "zbxexport.h"

#include "zbxavailability.h"

#include "zbxconnector.h"

#include "zbxtrends.h"

#include "zbxnum.h"

#include "zbxsysinfo.h"

#include "zbx_item_constants.h"

#include "zbxtagfilter.h"

#include "zbxcrypto.h"

#include "zbxescalations.h"

#include "zbxalgo.h"

#include "zbxhistory.h"

#include "zbxcacheconfig.h"

#include "zbxdb.h"

#include "zbxdbhigh.h"

#include "zbxdbschema.h"

#include "zbxjson.h"

#include "zbxshmem.h"

#include "zbxstr.h"

#include "zbxtime.h"

#include "zbxvariant.h"

​

static zbx_shmem_info_t *hc_index_mem = NULL;

static zbx_shmem_info_t *hc_mem = NULL;

static zbx_shmem_info_t *trend_mem = NULL;

​

#define LOCK_CACHE  zbx_mutex_lock(cache_lock)

#define UNLOCK_CACHE    zbx_mutex_unlock(cache_lock)

#define LOCK_TRENDS zbx_mutex_lock(trends_lock)

#define UNLOCK_TRENDS   zbx_mutex_unlock(trends_lock)

#define LOCK_CACHE_IDS      zbx_mutex_lock(cache_ids_lock)

#define UNLOCK_CACHE_IDS    zbx_mutex_unlock(cache_ids_lock)

​

static zbx_mutex_t  cache_lock = ZBX_MUTEX_NULL;

static zbx_mutex_t  trends_lock = ZBX_MUTEX_NULL;

static zbx_mutex_t  cache_ids_lock = ZBX_MUTEX_NULL;

​

static char     *sql = NULL;

static size_t       sql_alloc = 4 * ZBX_KIBIBYTE;

​

static zbx_get_program_type_f   get_program_type_cb = NULL;

static zbx_history_sync_f   sync_history_cb = NULL;

​

#define ZBX_IDS_SIZE    14

​

#define ZBX_HC_ITEMS_INIT_SIZE  1000

​

#define ZBX_TRENDS_CLEANUP_TIME (SEC_PER_MIN * 55)

​

/* the maximum number of characters for history cache values (except binary) */

#define ZBX_HISTORY_VALUE_LEN       (1024 * 64)

​

typedef struct

{

    char        table_name[ZBX_TABLENAME_LEN_MAX];

    zbx_uint64_t    lastid;

}

ZBX_DC_ID;

​

typedef struct

{

    ZBX_DC_ID   id[ZBX_IDS_SIZE];

}

ZBX_DC_IDS;

​

static ZBX_DC_IDS   *ids = NULL;

​

typedef struct

{

    zbx_list_t  list;

    zbx_hashset_t   index;

    int     state;

}