You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.3 KiB
95 lines
2.3 KiB
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
|
|
#include <gtest/gtest.h>
|
|
|
|
#include <sys/eventfd.h>
|
|
|
|
#include "utils.h"
|
|
|
|
TEST(eventfd, smoke) {
|
|
constexpr unsigned int kInitialValue = 2;
|
|
int fd = eventfd(kInitialValue, EFD_NONBLOCK);
|
|
ASSERT_NE(-1, fd);
|
|
|
|
eventfd_t value = 123;
|
|
ASSERT_EQ(0, eventfd_read(fd, &value));
|
|
ASSERT_EQ(kInitialValue, value);
|
|
|
|
// Reading clears the counter.
|
|
ASSERT_EQ(-1, eventfd_read(fd, &value));
|
|
ASSERT_EQ(EAGAIN, errno);
|
|
|
|
// Values written are added until the next read.
|
|
ASSERT_EQ(0, eventfd_write(fd, 1));
|
|
ASSERT_EQ(0, eventfd_write(fd, 1));
|
|
ASSERT_EQ(0, eventfd_write(fd, 1));
|
|
|
|
ASSERT_EQ(0, eventfd_read(fd, &value));
|
|
ASSERT_EQ(3U, value);
|
|
|
|
close(fd);
|
|
}
|
|
|
|
TEST(eventfd, cloexec) {
|
|
constexpr unsigned int kInitialValue = 2;
|
|
int fd = eventfd(kInitialValue, EFD_CLOEXEC);
|
|
ASSERT_NE(-1, fd);
|
|
ASSERT_TRUE(CloseOnExec(fd));
|
|
|
|
eventfd_t value = 123;
|
|
ASSERT_EQ(0, eventfd_read(fd, &value));
|
|
ASSERT_EQ(kInitialValue, value);
|
|
|
|
close(fd);
|
|
|
|
fd = eventfd(kInitialValue, EFD_NONBLOCK | EFD_CLOEXEC);
|
|
ASSERT_NE(-1, fd);
|
|
ASSERT_TRUE(CloseOnExec(fd));
|
|
|
|
value = 123;
|
|
ASSERT_EQ(0, eventfd_read(fd, &value));
|
|
ASSERT_EQ(kInitialValue, value);
|
|
|
|
close(fd);
|
|
}
|
|
|
|
TEST(eventfd, semaphore) {
|
|
int fd = eventfd(3, EFD_NONBLOCK | EFD_SEMAPHORE);
|
|
ASSERT_NE(-1, fd);
|
|
|
|
eventfd_t value = 123;
|
|
ASSERT_EQ(0, eventfd_read(fd, &value));
|
|
ASSERT_EQ(1U, value);
|
|
|
|
value = 123;
|
|
ASSERT_EQ(0, eventfd_read(fd, &value));
|
|
ASSERT_EQ(1U, value);
|
|
|
|
value = 123;
|
|
ASSERT_EQ(0, eventfd_read(fd, &value));
|
|
ASSERT_EQ(1U, value);
|
|
|
|
// The counter is cleared after the initial value decrements to 0.
|
|
ASSERT_EQ(-1, eventfd_read(fd, &value));
|
|
ASSERT_EQ(EAGAIN, errno);
|
|
|
|
close(fd);
|
|
}
|