Repo created

libs/base/scope_guard.hpp

@@ -0,0 +1,55 @@
+/// @author	Yury Melnichek mailto:melnichek@gmail.com
+/// @date	07.01.2005
+/// @brief	See http://gzip.rsdn.ru/forum/Message.aspx?mid=389127&only=1.
+
+#pragma once
+
+namespace base
+{
+namespace impl
+{
+/// Base class for all ScopeGuards.
+class GuardBase
+{
+public:
+  /// Disable ScopeGuard functionality on it's destruction
+  void release() const { m_bDoRollback = false; }
+
+protected:
+  GuardBase() : m_bDoRollback(true) {}
+
+  // Do something in the destructor
+  mutable bool m_bDoRollback;
+};
+
+/// ScopeGuard for specific functor
+template <typename TFunctor>
+class GuardImpl : public GuardBase
+{
+public:
+  explicit GuardImpl(TFunctor const & F) : m_Functor(F) {}
+
+  ~GuardImpl()
+  {
+    if (m_bDoRollback)
+      m_Functor();
+  }
+
+private:
+  TFunctor m_Functor;
+};
+}  // namespace impl
+
+typedef impl::GuardBase const & scope_guard;
+
+/// Create scope_guard
+template <typename TFunctor>
+impl::GuardImpl<TFunctor> make_scope_guard(TFunctor const & F)
+{
+  return impl::GuardImpl<TFunctor>(F);
+}
+}  // namespace base
+
+#define SCOPE_GUARD(name, func)                            \
+  ::base::scope_guard name = base::make_scope_guard(func); \
+  static_cast<void>(name)