/*
 * \brief  Lock guard
 * \author Norman Feske
 * \date   2006-07-26
 */

/*
 * Copyright (C) 2006-2013 Genode Labs GmbH
 *
 * This file is part of the Genode OS framework, which is distributed
 * under the terms of the GNU General Public License version 2.
 */

#ifndef _INCLUDE__BASE__LOCK_GUARD_H_
#define _INCLUDE__BASE__LOCK_GUARD_H_

namespace Genode { template <typename> class Lock_guard; }


/**
 * Lock guard template
 *
 * \param LT  lock type
 *
 * A lock guard is instantiated as a local variable. When a lock guard is
 * constructed, it acquires the lock that is specified as constructor argument.
 * When the control flow leaves the scope of the lock-guard variable via a
 * return statement or an exception, the lock guard's destructor gets called,
 * freeing the lock.
 */
template <typename LT>
class Genode::Lock_guard
{
	private:

		LT &_lock;

	public:

		explicit Lock_guard(LT &lock) : _lock(lock) { _lock.lock(); }

		~Lock_guard() { _lock.unlock(); }
};

#endif /* _INCLUDE__BASE__LOCK_GUARD_H_ */