autoreset.hpp

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//    OpenVPN -- An application to securely tunnel IP networks
//               over a single port, with support for SSL/TLS-based
//               session authentication and key exchange,
//               packet encryption, packet authentication, and
//               packet compression.
//
//    Copyright (C) 2012- OpenVPN Inc.
//
//    SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
 
// Automatically reset a target object when
// AutoReset goes out of scope.
 
#ifndef OPENVPN_COMMON_AUTORESET_H
#define OPENVPN_COMMON_AUTORESET_H
 
namespace openvpn {
 
template <typename T>
class AutoReset
{
  public:
    AutoReset(T &obj)
        : obj_(&obj)
    {
    }
 
    ~AutoReset()
    {
        if (obj_)
            obj_->reset();
    }
 
    void disarm()
    {
        obj_ = nullptr;
    }
 
  private:
    T *obj_;
};
 
} // namespace openvpn
 
#endif