55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
/// @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)
|