46 lines
1.0 KiB
C++
46 lines
1.0 KiB
C++
/*
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* \brief Lock guard
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* \author Norman Feske
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* \date 2006-07-26
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*/
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/*
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* Copyright (C) 2006-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__BASE__LOCK_GUARD_H_
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#define _INCLUDE__BASE__LOCK_GUARD_H_
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namespace Genode { template <typename> class Lock_guard; }
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/**
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* Lock guard template
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*
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* \param LT lock type
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*
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* A lock guard is instantiated as a local variable. When a lock guard is
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* constructed, it acquires the lock that is specified as constructor argument.
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* When the control flow leaves the scope of the lock-guard variable via a
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* return statement or an exception, the lock guard's destructor gets called,
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* freeing the lock.
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*/
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template <typename LT>
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class Genode::Lock_guard
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{
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private:
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LT &_lock;
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public:
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explicit Lock_guard(LT &lock) : _lock(lock) { _lock.lock(); }
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~Lock_guard() { _lock.unlock(); }
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};
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#endif /* _INCLUDE__BASE__LOCK_GUARD_H_ */
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