35 lines
759 B
C++
35 lines
759 B
C++
// Copyright (c) 2015 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_REVERSELOCK_H
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#define BITCOIN_REVERSELOCK_H
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/**
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* An RAII-style reverse lock. Unlocks on construction and locks on destruction.
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*/
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template<typename Lock>
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class reverse_lock
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{
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public:
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explicit reverse_lock(Lock& lock) : lock(lock) {
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lock.unlock();
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lock.swap(templock);
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}
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~reverse_lock() {
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templock.lock();
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templock.swap(lock);
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}
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private:
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reverse_lock(reverse_lock const&);
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reverse_lock& operator=(reverse_lock const&);
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Lock& lock;
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Lock templock;
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};
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#endif // BITCOIN_REVERSELOCK_H
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