mirror of
https://github.com/MariaDB/server.git
synced 2025-10-30 04:26:45 +03:00
87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
#ifndef SYS_VARS_SHARED_INCLUDED
|
|
#define SYS_VARS_SHARED_INCLUDED
|
|
|
|
/* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
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; version 2 of the License.
|
|
|
|
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 St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
|
|
/**
|
|
@file
|
|
"protected" interface to sys_var - server configuration variables.
|
|
|
|
This header is included by files implementing support and utility
|
|
functions of sys_var's (set_var.cc) and files implementing
|
|
classes in the sys_var hierarchy (sql_plugin.cc)
|
|
*/
|
|
|
|
#include <sql_priv.h>
|
|
#include "set_var.h"
|
|
|
|
extern bool throw_bounds_warning(THD *thd, const char *name,
|
|
bool fixed, bool is_unsigned, longlong v);
|
|
extern bool throw_bounds_warning(THD *thd, const char *name, bool fixed,
|
|
double v);
|
|
extern sys_var *intern_find_sys_var(const char *str, uint length);
|
|
|
|
extern sys_var_chain all_sys_vars;
|
|
|
|
/** wrapper to hide a mutex and an rwlock under a common interface */
|
|
class PolyLock
|
|
{
|
|
public:
|
|
virtual void rdlock()= 0;
|
|
virtual void wrlock()= 0;
|
|
virtual void unlock()= 0;
|
|
virtual ~PolyLock() {}
|
|
};
|
|
|
|
class PolyLock_mutex: public PolyLock
|
|
{
|
|
mysql_mutex_t *mutex;
|
|
public:
|
|
PolyLock_mutex(mysql_mutex_t *arg): mutex(arg) {}
|
|
void rdlock() { mysql_mutex_lock(mutex); }
|
|
void wrlock() { mysql_mutex_lock(mutex); }
|
|
void unlock() { mysql_mutex_unlock(mutex); }
|
|
};
|
|
|
|
class PolyLock_rwlock: public PolyLock
|
|
{
|
|
mysql_rwlock_t *rwlock;
|
|
public:
|
|
PolyLock_rwlock(mysql_rwlock_t *arg): rwlock(arg) {}
|
|
void rdlock() { mysql_rwlock_rdlock(rwlock); }
|
|
void wrlock() { mysql_rwlock_wrlock(rwlock); }
|
|
void unlock() { mysql_rwlock_unlock(rwlock); }
|
|
};
|
|
|
|
class AutoWLock
|
|
{
|
|
PolyLock *lock;
|
|
public:
|
|
AutoWLock(PolyLock *l) : lock(l) { if (lock) lock->wrlock(); }
|
|
~AutoWLock() { if (lock) lock->unlock(); }
|
|
};
|
|
|
|
class AutoRLock
|
|
{
|
|
PolyLock *lock;
|
|
public:
|
|
AutoRLock(PolyLock *l) : lock(l) { if (lock) lock->rdlock(); }
|
|
~AutoRLock() { if (lock) lock->unlock(); }
|
|
};
|
|
|
|
|
|
#endif /* SYS_VARS_SHARED_INCLUDED */
|