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-rw-r--r--sql/sys_vars_shared.h87
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+#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 02110-1335 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,const char *v);
+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);
+
+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 */