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/*
**
** Copyright 2006, The Android Open Source Project
**
** 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.
*/
#ifndef ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
#define ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
#include <atomic>
#include <stdint.h>
#include <stddef.h>
#include <sys/types.h>
#include <utils/RefBase.h>
#include <utils/KeyedVector.h>
#include <utils/Errors.h>
#include <GLES/gl.h>
#include "Tokenizer.h"
#include "TokenManager.h"
namespace android {
// ----------------------------------------------------------------------------
namespace gl {
struct buffer_t {
GLsizeiptr size;
GLenum usage;
uint8_t* data;
uint32_t name;
};
};
class EGLBufferObjectManager : public TokenManager
{
public:
EGLBufferObjectManager();
~EGLBufferObjectManager();
// protocol for sp<>
inline void incStrong(const void* id) const;
inline void decStrong(const void* id) const;
typedef void weakref_type;
gl::buffer_t const* bind(GLuint buffer);
int allocateStore(gl::buffer_t* bo, GLsizeiptr size, GLenum usage);
void deleteBuffers(GLsizei n, const GLuint* buffers);
private:
mutable std::atomic_size_t mCount;
mutable Mutex mLock;
KeyedVector<GLuint, gl::buffer_t*> mBuffers;
};
void EGLBufferObjectManager::incStrong(const void* /*id*/) const {
mCount.fetch_add(1, std::memory_order_relaxed);
}
void EGLBufferObjectManager::decStrong(const void* /*id*/) const {
if (mCount.fetch_sub(1, std::memory_order_release) == 0) {
std::atomic_thread_fence(std::memory_order_acquire);
delete this;
}
}
// ----------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
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