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/*
** Zabbix
** Copyright (C) 2001-2019 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 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 General Public License for more details.
**
** You should have received a copy of the GNU 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.
**/
#include "common.h"
#include "ipc.h"
#include "log.h"
/******************************************************************************
* *
* Function: zbx_shm_create *
* *
* Purpose: Create block of shared memory *
* *
* Parameters: size - size *
* *
* Return value: If the function succeeds, then return SHM ID *
* -1 on an error *
* *
* Author: Alexei Vladishev *
* *
******************************************************************************/
int zbx_shm_create(size_t size)
{
int shm_id;
if (-1 == (shm_id = shmget(IPC_PRIVATE, size, IPC_CREAT | IPC_EXCL | 0600)))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot allocate shared memory of size " ZBX_FS_SIZE_T ": %s",
(zbx_fs_size_t)size, zbx_strerror(errno));
return -1;
}
return shm_id;
}
/******************************************************************************
* *
* Function: zbx_shm_destroy *
* *
* Purpose: Destroy block of shared memory *
* *
* Parameters: shmid - Shared memory identifier *
* *
* Return value: If the function succeeds, then return 0 *
* -1 on an error *
* *
* Author: Andrea Biscuola *
* *
******************************************************************************/
int zbx_shm_destroy(int shmid)
{
if (-1 == shmctl(shmid, IPC_RMID, 0))
{
zbx_error("cannot remove existing shared memory: %s", zbx_strerror(errno));
return -1;
}
return 0;
}
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