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
36 namespace android {
37
38 // ----------------------------------------------------------------------------
39
40 namespace gl {
41
42 struct buffer_t {
43 GLsizeiptr size;
44 GLenum usage;
45 uint8_t* data;
46 uint32_t name;
47 };
48
49 };
50
51 class EGLBufferObjectManager : public TokenManager
52 {
53 public:
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
66 private:
67 mutable std::atomic_size_t mCount;
68 mutable Mutex mLock;
69 KeyedVector<GLuint, gl::buffer_t*> mBuffers;
70 };
71
incStrong(const void *)72 void EGLBufferObjectManager::incStrong(const void* /*id*/) const {
73 mCount.fetch_add(1, std::memory_order_relaxed);
74 }
decStrong(const void *)75 void 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