[VerusCoin.git] / src / reverselock.h

// Copyright (c) 2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_REVERSELOCK_H
#define BITCOIN_REVERSELOCK_H

/**
 * An RAII-style reverse lock. Unlocks on construction and locks on destruction.
 */
template<typename Lock>
class reverse_lock
{
public:

    explicit reverse_lock(Lock& lock) : lock(lock) {
        lock.unlock();
        lock.swap(templock);
    }

    ~reverse_lock() {
        templock.lock();
        templock.swap(lock);
    }

private:
    reverse_lock(reverse_lock const&);
    reverse_lock& operator=(reverse_lock const&);

    Lock& lock;
    Lock templock;
};

#endif // BITCOIN_REVERSELOCK_H
Commit	Line	Data
6b51b9b1 CR	1	// Copyright (c) 2015 The Bitcoin Core developers
	2	// Distributed under the MIT software license, see the accompanying
	3	// file COPYING or http://www.opensource.org/licenses/mit-license.php.
	4
	5	#ifndef BITCOIN_REVERSELOCK_H
	6	#define BITCOIN_REVERSELOCK_H
	7
	8	/**
	9	* An RAII-style reverse lock. Unlocks on construction and locks on destruction.
	10	*/
	11	template<typename Lock>
	12	class reverse_lock
	13	{
	14	public:
	15
	16	explicit reverse_lock(Lock& lock) : lock(lock) {
	17	lock.unlock();
4165af1b	18	lock.swap(templock);
6b51b9b1 CR	19	}
6b51b9b1 CR	20
4165af1b CF	21	~reverse_lock() {
	22	templock.lock();
	23	templock.swap(lock);
6b51b9b1 CR	24	}
	25
	26	private:
	27	reverse_lock(reverse_lock const&);
	28	reverse_lock& operator=(reverse_lock const&);
	29
	30	Lock& lock;
4165af1b	31	Lock templock;
6b51b9b1 CR	32	};
	33
	34	#endif // BITCOIN_REVERSELOCK_H