BufferObjectManager.h revision 3aa75f95f23df87cf74ddefe0d3f90b1484ff95e
1/*
2 **
3 ** Copyright 2006, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 **     http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17
18#ifndef ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
19#define ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
20
21#include <atomic>
22#include <stdint.h>
23#include <stddef.h>
24#include <sys/types.h>
25
26#include <utils/RefBase.h>
27#include <utils/KeyedVector.h>
28#include <utils/Errors.h>
29
30#include <GLES/gl.h>
31
32#include "Tokenizer.h"
33#include "TokenManager.h"
34
35
36namespace android {
37
38// ----------------------------------------------------------------------------
39
40namespace gl {
41
42struct buffer_t {
43    GLsizeiptr      size;
44    GLenum          usage;
45    uint8_t*        data;
46    uint32_t        name;
47};
48
49};
50
51class EGLBufferObjectManager : public TokenManager
52{
53public:
54    EGLBufferObjectManager();
55    ~EGLBufferObjectManager();
56
57    // protocol for sp<>
58    inline  void    incStrong(const void* id) const;
59    inline  void    decStrong(const void* id) const;
60    typedef void    weakref_type;
61
62    gl::buffer_t const* bind(GLuint buffer);
63    int                 allocateStore(gl::buffer_t* bo, GLsizeiptr size, GLenum usage);
64    void                deleteBuffers(GLsizei n, const GLuint* buffers);
65
66private:
67    mutable std::atomic_size_t          mCount;
68    mutable Mutex                       mLock;
69    KeyedVector<GLuint, gl::buffer_t*>  mBuffers;
70};
71
72void EGLBufferObjectManager::incStrong(const void* /*id*/) const {
73    mCount.fetch_add(1, std::memory_order_relaxed);
74}
75void EGLBufferObjectManager::decStrong(const void* /*id*/) const {
76    if (mCount.fetch_sub(1, std::memory_order_release) == 0) {
77        std::atomic_thread_fence(std::memory_order_acquire);
78        delete this;
79    }
80}
81
82// ----------------------------------------------------------------------------
83}; // namespace android
84
85#endif // ANDROID_OPENGLES_BUFFER_OBJECT_MANAGER_H
86
87