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 48
