Kito Cheng | 8baa929 | 2013-04-03 11:29:40 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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 | #include <gtest/gtest.h> |
| 18 | |
| 19 | #if !defined(__GLIBC__) // Android's prebuilt gcc's header files don't include <sys/eventfd.h>. |
| 20 | |
| 21 | #include <sys/eventfd.h> |
| 22 | |
| 23 | TEST(eventfd, smoke) { |
| 24 | unsigned int initial_value = 2; |
| 25 | int fd = eventfd(initial_value, O_NONBLOCK); |
| 26 | ASSERT_NE(fd, -1); |
| 27 | |
| 28 | eventfd_t value = 123; |
| 29 | ASSERT_EQ(0, eventfd_read(fd, &value)); |
| 30 | ASSERT_EQ(initial_value, value); |
| 31 | |
| 32 | // Reading clears the counter. |
| 33 | ASSERT_EQ(-1, eventfd_read(fd, &value)); |
| 34 | ASSERT_EQ(EAGAIN, errno); |
| 35 | |
| 36 | // Values written are added until the next read. |
| 37 | ASSERT_EQ(0, eventfd_write(fd, 1)); |
| 38 | ASSERT_EQ(0, eventfd_write(fd, 1)); |
| 39 | ASSERT_EQ(0, eventfd_write(fd, 1)); |
| 40 | |
| 41 | ASSERT_EQ(0, eventfd_read(fd, &value)); |
| 42 | ASSERT_EQ(3U, value); |
| 43 | |
| 44 | close(fd); |
| 45 | } |
| 46 | |
| 47 | #endif |