Dylan Katz | 7168f27 | 2020-07-02 11:51:44 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2020 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 | #include <unistd.h> |
| 19 | /** |
| 20 | * A pipe class for use when testing or fuzzing Looper |
| 21 | */ |
| 22 | class Pipe { |
| 23 | public: |
| 24 | int sendFd; |
| 25 | int receiveFd; |
| 26 | |
| 27 | Pipe() { |
| 28 | int fds[2]; |
| 29 | ::pipe(fds); |
| 30 | |
| 31 | receiveFd = fds[0]; |
| 32 | sendFd = fds[1]; |
| 33 | } |
| 34 | |
| 35 | ~Pipe() { |
| 36 | if (sendFd != -1) { |
| 37 | ::close(sendFd); |
| 38 | } |
| 39 | |
| 40 | if (receiveFd != -1) { |
| 41 | ::close(receiveFd); |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | android::status_t writeSignal() { |
| 46 | ssize_t nWritten = ::write(sendFd, "*", 1); |
| 47 | return nWritten == 1 ? 0 : -errno; |
| 48 | } |
| 49 | |
| 50 | android::status_t readSignal() { |
| 51 | char buf[1]; |
| 52 | ssize_t nRead = ::read(receiveFd, buf, 1); |
| 53 | return nRead == 1 ? 0 : nRead == 0 ? -EPIPE : -errno; |
| 54 | } |
| 55 | }; |