1/*
2 * Copyright (C) 2017 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 FRAMEWORKS_NATIVE_CMDS_LSHAL_PIPE_RELAY_H_
18
19#define FRAMEWORKS_NATIVE_CMDS_LSHAL_PIPE_RELAY_H_
20
21#include <android-base/macros.h>
22#include <ostream>
23#include <utils/Errors.h>
24#include <utils/RefBase.h>
25
26namespace android {
27namespace lshal {
28
29/* Creates an AF_UNIX socketpair and spawns a thread that relays any data
30 * written to the "write"-end of the pair to the specified output stream "os".
31 */
32struct PipeRelay {
33    explicit PipeRelay(std::ostream &os);
34    ~PipeRelay();
35
36    status_t initCheck() const;
37
38    // Returns the file descriptor corresponding to the "write"-end of the
39    // connection.
40    int fd() const;
41
42private:
43    struct RelayThread;
44
45    std::ostream &mOutStream;
46    status_t mInitCheck;
47    int mFds[2];
48    sp<RelayThread> mThread;
49
50    static void CloseFd(int *fd);
51
52    DISALLOW_COPY_AND_ASSIGN(PipeRelay);
53};
54
55}  // namespace lshal
56}  // namespace android
57
58#endif  // FRAMEWORKS_NATIVE_CMDS_LSHAL_PIPE_RELAY_H_
59
60