text: /*
   *  Copyright (c) 2018, The OpenThread Authors.
   *  All rights reserved.
   *
   *  Redistribution and use in source and binary forms, with or without
   *  modification, are permitted provided that the following conditions are met:
   *  1. Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *  3. Neither the name of the copyright holder nor the
   *     names of its contributors may be used to endorse or promote products
   *     derived from this software without specific prior written permission.
   *
   *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   *  POSSIBILITY OF SUCH DAMAGE.
   */
  
  /**
   * @file
   *   This file provides an example on how to implement an OpenThread vendor extension.
   */
  
  #include "openthread-core-config.h"
  
  #include <stdint.h>
  
  #include "common/code_utils.hpp"
  #include "common/extension.hpp"
  #include "common/new.hpp"
  #include "utils/wrap_stdbool.h"
  
  namespace ot {
  namespace Extension {
  
  /**
   * This class defines the vendor extension object.
   *
   */
  class Extension : public ExtensionBase
  {
  public:
      explicit Extension(Instance &aInstance)
          : ExtensionBase(aInstance)
      {
      }
  
      // TODO: Add vendor extension code (add methods and/or member variables).
  };
  
  // ----------------------------------------------------------------------------
  // `ExtensionBase` API
  // ----------------------------------------------------------------------------
  
  static otDEFINE_ALIGNED_VAR(sExtensionRaw, sizeof(Extension), uint64_t);
  
  ExtensionBase &ExtensionBase::Init(Instance &aInstance)
  {
      ExtensionBase *ext = reinterpret_cast<ExtensionBase *>(&sExtensionRaw);
  
      VerifyOrExit(!ext->mIsInitialized);
  
      ext = new (&sExtensionRaw) Extension(aInstance);
  
  exit:
      return *ext;
  }
  
  void ExtensionBase::SignalInstanceInit(void)
  {
      // OpenThread instance is initialized and ready.
  
      // TODO: Implement vendor extension code here and start interaction with OpenThread instance.
  }
  
  void ExtensionBase::SignalNcpInit(Ncp::NcpBase &aNcpBase)
  {
      // NCP instance is initialized and ready.
  
      // TODO: Implement vendor extension code here and start interaction with NCP instance.
  
      OT_UNUSED_VARIABLE(aNcpBase);
  }
  
  } // namespace Extension
  } // namespace ot
  