/*
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**
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** Copyright 2006, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#ifndef ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
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#define ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
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#include <atomic>
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#include <stdint.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <utils/RefBase.h>
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#include <utils/KeyedVector.h>
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#include <utils/Errors.h>
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#include <GLES/gl.h>
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#include "Tokenizer.h"
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#include "TokenManager.h"
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namespace android {
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// ----------------------------------------------------------------------------
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namespace gl {
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struct buffer_t {
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GLsizeiptr size;
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GLenum usage;
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uint8_t* data;
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uint32_t name;
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};
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};
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class EGLBufferObjectManager : public TokenManager
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{
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public:
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EGLBufferObjectManager();
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~EGLBufferObjectManager();
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// protocol for sp<>
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inline void incStrong(const void* id) const;
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inline void decStrong(const void* id) const;
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typedef void weakref_type;
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gl::buffer_t const* bind(GLuint buffer);
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int allocateStore(gl::buffer_t* bo, GLsizeiptr size, GLenum usage);
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void deleteBuffers(GLsizei n, const GLuint* buffers);
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private:
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mutable std::atomic_size_t mCount;
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mutable Mutex mLock;
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KeyedVector<GLuint, gl::buffer_t*> mBuffers;
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};
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void EGLBufferObjectManager::incStrong(const void* /*id*/) const {
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mCount.fetch_add(1, std::memory_order_relaxed);
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}
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void EGLBufferObjectManager::decStrong(const void* /*id*/) const {
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if (mCount.fetch_sub(1, std::memory_order_release) == 0) {
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std::atomic_thread_fence(std::memory_order_acquire);
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delete this;
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}
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
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