1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ANDROID_DETACHED_BUFFER_HUB_HANDLE_H
18 #define ANDROID_DETACHED_BUFFER_HUB_HANDLE_H
19 
20 #include <pdx/channel_handle.h>
21 
22 #include <memory>
23 
24 namespace android {
25 
26 // A wrapper that holds a pdx::LocalChannelHandle object. From the handle, a BufferHub buffer can be
27 // created. Current implementation assumes that the underlying transport is using libpdx (thus
28 // holding a pdx::LocalChannelHandle object), but future implementation can change it to a Binder
29 // backend if ever needed.
30 class DetachedBufferHandle {
31 public:
Create(pdx::LocalChannelHandle handle)32     static std::unique_ptr<DetachedBufferHandle> Create(pdx::LocalChannelHandle handle) {
33         return std::unique_ptr<DetachedBufferHandle>(new DetachedBufferHandle(std::move(handle)));
34     }
35 
36     // Accessors to get or take the internal pdx::LocalChannelHandle.
handle()37     pdx::LocalChannelHandle& handle() { return mHandle; }
handle()38     const pdx::LocalChannelHandle& handle() const { return mHandle; }
39 
40     // Returns whether the DetachedBufferHandle holds a BufferHub channel.
isValid()41     bool isValid() const { return mHandle.valid(); }
42 
43 private:
44     // Constructs a DetachedBufferHandle from a pdx::LocalChannelHandle.
DetachedBufferHandle(pdx::LocalChannelHandle handle)45     explicit DetachedBufferHandle(pdx::LocalChannelHandle handle) : mHandle(std::move(handle)) {}
46 
47     pdx::LocalChannelHandle mHandle;
48 };
49 
50 } // namespace android
51 
52 #endif // ANDROID_DETACHED_BUFFER_HUB_HANDLE_H
53