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34 lines
759 B
34 lines
759 B
// 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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