kc3-lang/angle/src/common/RefCountObject.h

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• Author : apatrick@chromium.org
  Date : 2012-01-23 20:04:48
  Hash : b66a7015
  Message : Moved RefCountObject to common so it can be used by libEGL. Review URL: https://codereview.appspot.com/5557064 git-svn-id: https://angleproject.googlecode.com/svn/trunk@956 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/common/RefCountObject.h

• //
  // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // RefCountObject.h: Defines the gl::RefCountObject base class that provides
  // lifecycle support for GL objects using the traditional BindObject scheme, but
  // that need to be reference counted for correct cross-context deletion.
  // (Concretely, textures, buffers and renderbuffers.)
  
  #ifndef COMMON_REFCOUNTOBJECT_H_
  #define COMMON_REFCOUNTOBJECT_H_
  
  #include <cstddef>
  
  #define GL_APICALL
  #include <GLES2/gl2.h>
  
  #include "common/debug.h"
  
  class RefCountObject
  {
    public:
      explicit RefCountObject(GLuint id);
      virtual ~RefCountObject();
  
      virtual void addRef() const;
      virtual void release() const;
  
      GLuint id() const { return mId; }
      
    private:
      GLuint mId;
  
      mutable std::size_t mRefCount;
  };
  
  class RefCountObjectBindingPointer
  {
    protected:
      RefCountObjectBindingPointer() : mObject(NULL) { }
      ~RefCountObjectBindingPointer() { ASSERT(mObject == NULL); } // Objects have to be released before the resource manager is destroyed, so they must be explicitly cleaned up.
  
      void set(RefCountObject *newObject);
      RefCountObject *get() const { return mObject; }
  
    public:
      GLuint id() const { return (mObject != NULL) ? mObject->id() : 0; }
      bool operator ! () const { return (get() == NULL); }
  
    private:
      RefCountObject *mObject;
  };
  
  template <class ObjectType>
  class BindingPointer : public RefCountObjectBindingPointer
  {
    public:
      void set(ObjectType *newObject) { RefCountObjectBindingPointer::set(newObject); }
      ObjectType *get() const { return static_cast<ObjectType*>(RefCountObjectBindingPointer::get()); }
      ObjectType *operator -> () const { return get(); }
  };
  
  #endif   // COMMON_REFCOUNTOBJECT_H_