Initial Vexta Core v0.1.0 release

src/reverselock.h

@@ -0,0 +1,34 @@
+// Copyright (c) 2015-2016 The DigiByte Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef DIGIBYTE_REVERSELOCK_H
+#define DIGIBYTE_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 // DIGIBYTE_REVERSELOCK_H