APIHandle.h

// ======================================================================== //
// Copyright 2019-2020 Ingo Wald                                            //
//                                                                          //
// Licensed under the Apache License, Version 2.0 (the "License");          //
// you may not use this file except in compliance with the License.         //
// You may obtain a copy of the License at                                  //
//                                                                          //
//     http://www.apache.org/licenses/LICENSE-2.0                           //
//                                                                          //
// Unless required by applicable law or agreed to in writing, software      //
// distributed under the License is distributed on an "AS IS" BASIS,        //
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. //
// See the License for the specific language governing permissions and      //
// limitations under the License.                                           //
// ======================================================================== //
 
#include "owl/Context.h"
 
namespace owl {
  
  struct APIContext;
 
  struct APIHandle {
    APIHandle(Object::SP object, APIContext *context);
    virtual ~APIHandle();
    template<typename T> inline std::shared_ptr<T> get();
    inline std::shared_ptr<APIContext> getContext() const { return context; }
    inline bool isContext() const
    {
      return ((void*)object.get() == (void*)context.get());
    }
    std::string toString() const
    {
      assert(object);
      return object->toString();
    }
    void clear() { object = nullptr; }//context = nullptr; }
    std::shared_ptr<Object>     object;
    std::shared_ptr<APIContext> context;
  };
 
  template<typename T> inline std::shared_ptr<T> APIHandle::get()
  {
    assert(object);
    std::shared_ptr<T> asT = std::dynamic_pointer_cast<T>(object);
    if (object && !asT) {
      const std::string objectTypeID = typeid(*object.get()).name();
    
      const std::string tTypeID = typeid(T).name();
      OWL_RAISE("could not convert APIHandle of type "
                + objectTypeID
                + " to object of type "
                + tTypeID);
    }
    assert(asT);
    return asT;
  }
  
} // ::owl