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 "zbxcommon.h"

#include "zbxpreprocbase.h"

​

ZBX_VECTOR_IMPL(pp_step_history, zbx_pp_step_history_t)

​

struct zbx_pp_history_cache

{

    pthread_mutex_t     lock;

    zbx_pp_history_t    *history;

    unsigned int        refcount;

};

​

/******************************************************************************

 *                                                                            *

 * Purpose: create preprocessing history                                      *

 *                                                                            *

 * Parameters: history_num - [IN] number of steps using history               *

 *                                                                            *

 * Return value: The created preprocessing history.                           *

 *                                                                            *

 ******************************************************************************/

zbx_pp_history_t    *zbx_pp_history_create(int history_num)

{

    zbx_pp_history_t    *history = (zbx_pp_history_t *)zbx_malloc(NULL, sizeof(zbx_pp_history_t));

    history->refcount = 1;

​

    zbx_vector_pp_step_history_create(&history->step_history);

​

    if (0 != history_num)

        zbx_vector_pp_step_history_reserve(&history->step_history, (size_t)history_num);

​

    return history;

}

​

zbx_pp_history_t    *zbx_pp_history_release(zbx_pp_history_t *history)

{

    if (NULL == history || 0 != --history->refcount)

        return history;

​

    for (int i = 0; i < history->step_history.values_num; i++)

        zbx_variant_clear(&history->step_history.values[i].value);

​

    zbx_vector_pp_step_history_destroy(&history->step_history);

​

    zbx_free(history);

​

    return NULL;

}

​