text: // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  #ifndef HANDLE_WRAP_H_
  #define HANDLE_WRAP_H_
  
  #include "ngx-queue.h"
  
  namespace node {
  
  // Rules:
  //
  // - Do not throw from handle methods. Set errno.
  //
  // - MakeCallback may only be made directly off the event loop.
  //   That is there can be no JavaScript stack frames underneith it.
  //   (Is there anyway to assert that?)
  //
  // - No use of v8::WeakReferenceCallback. The close callback signifies that
  //   we're done with a handle - external resources can be freed.
  //
  // - Reusable?
  //
  // - The uv_close_cb is used to free the c++ object. The close callback
  //   is not made into javascript land.
  //
  // - uv_ref, uv_unref counts are managed at this layer to avoid needless
  //   js/c++ boundary crossing. At the javascript layer that should all be
  //   taken care of.
  
  class HandleWrap {
    public:
      static void Initialize(v8::Handle<v8::Object> target);
      static v8::Handle<v8::Value> Close(const v8::Arguments& args);
      static v8::Handle<v8::Value> Unref(const v8::Arguments& args);
  
    protected:
      HandleWrap(v8::Handle<v8::Object> object, uv_handle_t* handle);
      virtual ~HandleWrap();
  
      virtual void SetHandle(uv_handle_t* h);
  
      v8::Persistent<v8::Object> object_;
  
    private:
      friend v8::Handle<v8::Value> GetActiveHandles(const v8::Arguments&);
      static void OnClose(uv_handle_t* handle);
      ngx_queue_t handle_wrap_queue_;
      // Using double underscore due to handle_ member in tcp_wrap. Probably
      // tcp_wrap should rename it's member to 'handle'.
      uv_handle_t* handle__;
      bool unref_;
  };
  
  
  }  // namespace node
  
  
  #endif  // HANDLE_WRAP_H_
  