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Diffstat (limited to 'src/3rdparty/angle/src/libANGLE/RefCountObject.h')
-rw-r--r-- | src/3rdparty/angle/src/libANGLE/RefCountObject.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libANGLE/RefCountObject.h b/src/3rdparty/angle/src/libANGLE/RefCountObject.h new file mode 100644 index 0000000000..48c0338c3f --- /dev/null +++ b/src/3rdparty/angle/src/libANGLE/RefCountObject.h @@ -0,0 +1,110 @@ +// +// 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; } + + 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; } + bool operator!() const { return (mObject == nullptr); } + + 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_ |