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

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• Author : Geoff Lang
  Date : 2015-07-17 14:03:27
  Hash : cdb94508
  Message : Add a RefCountObject::getRefCount method for testing. BUG=angleproject:970 Change-Id: I4fae29766ee76512375872535dbaf2d31a379de0 Reviewed-on: https://chromium-review.googlesource.com/286551 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• src/libANGLE/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 LIBANGLE_REFCOUNTOBJECT_H_
  #define LIBANGLE_REFCOUNTOBJECT_H_
  
  #include "common/debug.h"
  
  #include "angle_gl.h"
  
  #include <cstddef>
  
  class RefCountObject : angle::NonCopyable
  {
    public:
      explicit RefCountObject(GLuint id);
      virtual ~RefCountObject();
  
      virtual void addRef() const;
      virtual void release() const;
  
      GLuint id() const { return mId; }
  
      size_t getRefCount() const { return mRefCount; }
  
    private:
      GLuint mId;
  
      mutable std::size_t mRefCount;
  };
  
  template <class ObjectType>
  class BindingPointer
  {
    public:
      BindingPointer()
          : mObject(nullptr)
      {
      }
  
      BindingPointer(const BindingPointer<ObjectType> &other)
          : mObject(nullptr)
      {
          set(other.mObject);
      }
  
      void operator=(const BindingPointer<ObjectType> &other)
      {
          set(other.mObject);
      }
  
      virtual ~BindingPointer()
      {
          // Objects have to be released before the resource manager is destroyed, so they must be explicitly cleaned up.
          ASSERT(mObject == nullptr);
      }
  
      virtual void set(ObjectType *newObject)
      {
          // addRef first in case newObject == mObject and this is the last reference to it.
          if (newObject != nullptr) reinterpret_cast<const RefCountObject*>(newObject)->addRef();
          if (mObject != nullptr) reinterpret_cast<const RefCountObject*>(mObject)->release();
          mObject = newObject;
      }
  
      ObjectType *get() const { return mObject; }
      ObjectType *operator->() const { return mObject; }
  
      GLuint id() const { return (mObject != nullptr) ? mObject->id() : 0; }
  
    private:
      ObjectType *mObject;
  };
  
  template <class ObjectType>
  class OffsetBindingPointer : public BindingPointer<ObjectType>
  {
    public:
      OffsetBindingPointer() : mOffset(0), mSize(0) { }
  
      void set(ObjectType *newObject) override
      {
          BindingPointer<ObjectType>::set(newObject);
          mOffset = 0;
          mSize = 0;
      }
  
      void set(ObjectType *newObject, GLintptr offset, GLsizeiptr size)
      {
          BindingPointer<ObjectType>::set(newObject);
          mOffset = offset;
          mSize = size;
      }
  
      GLintptr getOffset() const { return mOffset; }
      GLsizeiptr getSize() const { return mSize; }
  
    private:
      GLintptr mOffset;
      GLsizeiptr mSize;
  };
  
  #endif   // LIBANGLE_REFCOUNTOBJECT_H_