include/openssl/c++/scoped_helpers.h

/* Copyright (c) 2016, Google Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */

#ifndef OPENSSL_HEADER_CXX_SCOPED_HELPERS_H
#define OPENSSL_HEADER_CXX_SCOPED_HELPERS_H

namespace bssl {

template<typename T, typename CleanupRet, void (*init_func)(T*),
         CleanupRet (*cleanup_func)(T*)>
class ScopedContext {
 public:
  ScopedContext() {
    init_func(&ctx_);
  }
  ~ScopedContext() {
    cleanup_func(&ctx_);
  }

  T *get() { return &ctx_; }
  const T *get() const { return &ctx_; }

  void Reset() {
    cleanup_func(&ctx_);
    init_func(&ctx_);
  }

 private:
  T ctx_;
};

}  // namespace bssl

#endif /* OPENSSL_HEADER_CXX_SCOPED_HELPERS_H */