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 #pragma once
18 
19 #include <binder/Common.h>
20 #include <binder/Parcel.h>
21 #include <binder/Parcelable.h>
22 #include <binder/unique_fd.h>
23 
24 namespace android {
25 namespace os {
26 
27 /*
28  * C++ implementation of the Java class android.os.ParcelFileDescriptor
29  */
30 class LIBBINDER_EXPORTED ParcelFileDescriptor : public android::Parcelable {
31 public:
32     ParcelFileDescriptor();
33     explicit ParcelFileDescriptor(binder::unique_fd fd);
ParcelFileDescriptor(ParcelFileDescriptor && other)34     ParcelFileDescriptor(ParcelFileDescriptor&& other) noexcept : mFd(std::move(other.mFd)) { }
35     ParcelFileDescriptor& operator=(ParcelFileDescriptor&& other) noexcept = default;
36     ~ParcelFileDescriptor() override;
37 
get()38     int get() const { return mFd.get(); }
release()39     binder::unique_fd release() { return std::move(mFd); }
40     void reset(binder::unique_fd fd = binder::unique_fd()) { mFd = std::move(fd); }
41 
42     // android::Parcelable override:
43     android::status_t writeToParcel(android::Parcel* parcel) const override;
44     android::status_t readFromParcel(const android::Parcel* parcel) override;
45 
toString()46     inline std::string toString() const { return "ParcelFileDescriptor:" + std::to_string(get()); }
47     inline bool operator!=(const ParcelFileDescriptor& rhs) const {
48         return mFd.get() != rhs.mFd.get();
49     }
50     inline bool operator<(const ParcelFileDescriptor& rhs) const {
51         return mFd.get() < rhs.mFd.get();
52     }
53     inline bool operator<=(const ParcelFileDescriptor& rhs) const {
54         return mFd.get() <= rhs.mFd.get();
55     }
56     inline bool operator==(const ParcelFileDescriptor& rhs) const {
57         return mFd.get() == rhs.mFd.get();
58     }
59     inline bool operator>(const ParcelFileDescriptor& rhs) const {
60         return mFd.get() > rhs.mFd.get();
61     }
62     inline bool operator>=(const ParcelFileDescriptor& rhs) const {
63         return mFd.get() >= rhs.mFd.get();
64     }
65 private:
66     binder::unique_fd mFd;
67 };
68 
69 } // namespace os
70 } // namespace android
71