You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
108 lines
3.2 KiB
108 lines
3.2 KiB
#ifndef SYS_VARS_SHARED_INCLUDED
|
|
#define SYS_VARS_SHARED_INCLUDED
|
|
|
|
/* Copyright (c) 2002, 2018, 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, version 2.0,
|
|
as published by the Free Software Foundation.
|
|
|
|
This program is also distributed with certain software (including
|
|
but not limited to OpenSSL) that is licensed under separate terms,
|
|
as designated in a particular file or component or in included license
|
|
documentation. The authors of MySQL hereby grant you an additional
|
|
permission to link the program and your derivative works with the
|
|
separately licensed software that they have included with MySQL.
|
|
|
|
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, version 2.0, 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 "mysql/psi/mysql_mutex.h"
|
|
#include "mysql/psi/mysql_thread.h" // mysql_mutex_t
|
|
#include "sql/sql_table.h"
|
|
|
|
class THD;
|
|
class sys_var;
|
|
|
|
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, size_t length);
|
|
|
|
/** 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 PolyLock_lock_log : public PolyLock {
|
|
public:
|
|
void rdlock();
|
|
void wrlock();
|
|
void unlock();
|
|
};
|
|
|
|
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 */
|
|
|