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Diffstat (limited to 'mysql/mutex_lock.h')
-rw-r--r-- | mysql/mutex_lock.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/mysql/mutex_lock.h b/mysql/mutex_lock.h new file mode 100644 index 0000000..abb2c51 --- /dev/null +++ b/mysql/mutex_lock.h @@ -0,0 +1,47 @@ +/* Copyright (c) 2014, 2015, 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 */ + +#ifndef MUTEX_LOCK_INCLUDED +#define MUTEX_LOCK_INCLUDED + +#include <my_global.h> +#include <mysql/psi/mysql_thread.h> + +/** + A simple wrapper around a mutex: + Grabs the mutex in the CTOR, releases it in the DTOR. + The mutex may be NULL, in which case this is a no-op. +*/ +class Mutex_lock +{ +public: + explicit Mutex_lock(mysql_mutex_t *mutex) : m_mutex(mutex) + { + if (m_mutex) + mysql_mutex_lock(m_mutex); + } + ~Mutex_lock() + { + if (m_mutex) + mysql_mutex_unlock(m_mutex); + } +private: + mysql_mutex_t *m_mutex; + + Mutex_lock(const Mutex_lock&); /* Not copyable. */ + void operator=(const Mutex_lock&); /* Not assignable. */ +}; + +#endif // MUTEX_LOCK_INCLUDED |