1 files changed, 59 insertions, 0 deletions
diff --git a/cpp/src/sys/ScopedIncrement.h b/cpp/src/sys/ScopedIncrement.h
new file mode 100644
index 0000000000..f14461ddaf
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+++ b/cpp/src/sys/ScopedIncrement.h
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+#ifndef _posix_ScopedIncrement_h
+#define _posix_ScopedIncrement_h
+
+/*
+ *
+ * Copyright (c) 2006 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <boost/noncopyable.hpp>
+
+namespace qpid {
+namespace sys {
+
+/** Increment counter in constructor and decrement in destructor. */
+template <class T>
+class ScopedIncrement : boost::noncopyable
+{
+  public:
+    ScopedIncrement(T& c) : count(c) { ++count; }
+    ~ScopedIncrement() { --count; }
+  private:
+    T& count;
+};
+
+
+/** Decrement counter in constructor and increment in destructor. */
+template <class T>
+class ScopedDecrement : boost::noncopyable
+{
+  public:
+    ScopedDecrement(T& c) : count(c) { value = --count; }
+    ~ScopedDecrement() { ++count; }
+
+    /** Return the value after the decrement. */
+    operator long() { return value; }
+
+  private:
+    T& count;
+    long value;
+};
+
+
+}}
+
+
+#endif // _posix_ScopedIncrement_h