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/*
** 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/>.
**/
#ifndef ZABBIX_MUTEXS_H
#define ZABBIX_MUTEXS_H
#include "zbxcommon.h"
#include "zbxprof.h"
#ifdef _WINDOWS
# define ZBX_MUTEX_NULL NULL
# define ZBX_MUTEX_LOG zbx_mutex_create_per_process_name(L"ZBX_MUTEX_LOG")
# define ZBX_MUTEX_PERFSTAT zbx_mutex_create_per_process_name(L"ZBX_MUTEX_PERFSTAT")
typedef wchar_t * zbx_mutex_name_t;
typedef HANDLE zbx_mutex_t;
# define zbx_mutex_lock(mutex) __zbx_mutex_lock(__FILE__, __LINE__, mutex)
# define zbx_mutex_unlock(mutex) __zbx_mutex_unlock(__FILE__, __LINE__, mutex)
#else /* not _WINDOWS */
typedef enum
{
ZBX_MUTEX_LOG = 0,
ZBX_MUTEX_CACHE,
ZBX_MUTEX_TRENDS,
ZBX_MUTEX_CACHE_IDS,
ZBX_MUTEX_SELFMON,
ZBX_MUTEX_CPUSTATS,
ZBX_MUTEX_DISKSTATS,
ZBX_MUTEX_VALUECACHE,
ZBX_MUTEX_VMWARE,
ZBX_MUTEX_SQLITE3,
ZBX_MUTEX_PROCSTAT,
ZBX_MUTEX_PROXY_HISTORY,
#ifdef HAVE_VMINFO_T_UPDATES
ZBX_MUTEX_KSTAT,
#endif
ZBX_MUTEX_MODBUS,
ZBX_MUTEX_TREND_FUNC,
ZBX_MUTEX_REMOTE_COMMANDS,
ZBX_MUTEX_PROXY_BUFFER,
ZBX_MUTEX_VPS_MONITOR,
/* NOTE: Do not forget to sync changes here with mutex names in diag_add_locks_info()! */
ZBX_MUTEX_COUNT
}
zbx_mutex_name_t;
typedef enum
{
ZBX_RWLOCK_CONFIG = 0,
ZBX_RWLOCK_CONFIG_HISTORY,
ZBX_RWLOCK_VALUECACHE,
ZBX_RWLOCK_COUNT,
}
zbx_rwlock_name_t;
#ifdef HAVE_PTHREAD_PROCESS_SHARED
# define ZBX_MUTEX_NULL NULL
# define ZBX_RWLOCK_NULL NULL
# define zbx_rwlock_wrlock(rwlock) \
\
do \
{ \
zbx_prof_start(__func__, ZBX_PROF_RWLOCK); \
__zbx_rwlock_wrlock(__FILE__, __LINE__, rwlock); \
zbx_prof_end_wait(); \
} \
while (0)
# define zbx_rwlock_rdlock(rwlock) \
\
do \
{ \
zbx_prof_start(__func__, ZBX_PROF_RWLOCK); \
__zbx_rwlock_rdlock(__FILE__, __LINE__, rwlock); \
zbx_prof_end_wait(); \
} \
while(0)
# define zbx_rwlock_unlock(rwlock) \
\
do \
{ \
__zbx_rwlock_unlock(__FILE__, __LINE__, rwlock); \
zbx_prof_end(); \
} \
while(0)
typedef pthread_mutex_t * zbx_mutex_t;
typedef pthread_rwlock_t * zbx_rwlock_t;
void __zbx_rwlock_wrlock(const char *filename, int line, zbx_rwlock_t rwlock);
void __zbx_rwlock_rdlock(const char *filename, int line, zbx_rwlock_t rwlock);
void __zbx_rwlock_unlock(const char *filename, int line, zbx_rwlock_t rwlock);
void zbx_rwlock_destroy(zbx_rwlock_t *rwlock);
void zbx_locks_disable(void);
void zbx_locks_enable(void);
#else /* fallback to semaphores if read-write locks are not available */
# define ZBX_RWLOCK_NULL -1
# define ZBX_MUTEX_NULL -1
# define zbx_rwlock_wrlock(mutex) \
\
do \
{ \
zbx_prof_start(__func__, ZBX_PROF_MUTEX); \
__zbx_mutex_lock(__FILE__, __LINE__, mutex); \
zbx_prof_end_wait(); \
} \
while(0)
# define zbx_rwlock_rdlock(mutex) \
\
do \
{ \
zbx_prof_start(__func__, ZBX_PROF_MUTEX); \
__zbx_mutex_lock(__FILE__, __LINE__, mutex); \
zbx_prof_end_wait(); \
} \
while(0)
# define zbx_rwlock_unlock(mutex) \
\
do \
{ \
__zbx_mutex_unlock(__FILE__, __LINE__, mutex); \
zbx_prof_end(); \
} \
while(0)
# define zbx_rwlock_destroy(rwlock) zbx_mutex_destroy(rwlock)
typedef int zbx_mutex_t;
typedef int zbx_rwlock_t;
#endif
int zbx_locks_create(char **error);
void zbx_locks_destroy(void);
int zbx_rwlock_create(zbx_rwlock_t *rwlock, zbx_rwlock_name_t name, char **error);
zbx_mutex_t zbx_mutex_addr_get(zbx_mutex_name_t mutex_name);
zbx_rwlock_t zbx_rwlock_addr_get(zbx_rwlock_name_t rwlock_name);
# define zbx_mutex_lock(mutex) \
\
do \
{ \
zbx_prof_start(__func__, ZBX_PROF_MUTEX); \
__zbx_mutex_lock(__FILE__, __LINE__, mutex); \
zbx_prof_end_wait(); \
} \
while(0)
# define zbx_mutex_unlock(mutex) \
\
do \
{ \
__zbx_mutex_unlock(__FILE__, __LINE__, mutex); \
zbx_prof_end(); \
} \
while(0)
#endif /* _WINDOWS */
int zbx_mutex_create(zbx_mutex_t *mutex, zbx_mutex_name_t name, char **error);
void __zbx_mutex_lock(const char *filename, int line, zbx_mutex_t mutex);
void __zbx_mutex_unlock(const char *filename, int line, zbx_mutex_t mutex);
void zbx_mutex_destroy(zbx_mutex_t *mutex);
#ifdef _WINDOWS
zbx_mutex_name_t zbx_mutex_create_per_process_name(const zbx_mutex_name_t prefix);
#endif
#endif /* ZABBIX_MUTEXS_H */
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