72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) Huawei Technologies Co., Ltd. 2021. All rights reserved.
|
|
* Author: Xie Ziyao <xieziyao@huawei.com>
|
|
*/
|
|
|
|
/*\
|
|
* [Description]
|
|
*
|
|
* Check that a timeout equal to zero causes epoll_wait() to return immediately.
|
|
*/
|
|
|
|
#include <sys/epoll.h>
|
|
|
|
#include "tst_test.h"
|
|
#include "tst_timer_test.h"
|
|
|
|
#define USEC_PRECISION 1000 /* Error margin allowed in usec */
|
|
|
|
static int epfd, fds[2];
|
|
static struct epoll_event epevs[1] = {
|
|
{.events = EPOLLIN}
|
|
};
|
|
|
|
static void run(void)
|
|
{
|
|
tst_timer_start(CLOCK_MONOTONIC);
|
|
TEST(epoll_wait(epfd, epevs, 1, 0));
|
|
tst_timer_stop();
|
|
|
|
if (TST_RET != 0)
|
|
tst_res(TFAIL | TTERRNO, "epoll_wait() returned %li", TST_RET);
|
|
|
|
if (tst_timer_elapsed_us() <= USEC_PRECISION)
|
|
tst_res(TPASS, "epoll_wait() returns immediately with a timeout equal to zero");
|
|
else
|
|
tst_res(TFAIL, "epoll_wait() waited for %llius with a timeout equal to zero",
|
|
tst_timer_elapsed_us());
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
SAFE_PIPE(fds);
|
|
|
|
epfd = epoll_create(1);
|
|
if (epfd == -1)
|
|
tst_brk(TBROK | TERRNO, "epoll_create()");
|
|
|
|
epevs[0].data.fd = fds[0];
|
|
|
|
if (epoll_ctl(epfd, EPOLL_CTL_ADD, fds[0], &epevs[0]))
|
|
tst_brk(TBROK | TERRNO, "epoll_clt(..., EPOLL_CTL_ADD, ...)");
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
if (epfd > 0)
|
|
SAFE_CLOSE(epfd);
|
|
|
|
if (fds[0] > 0)
|
|
SAFE_CLOSE(fds[0]);
|
|
|
|
if (fds[1] > 0)
|
|
SAFE_CLOSE(fds[1]);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.test_all = run,
|
|
.setup = setup,
|
|
.cleanup = cleanup,
|
|
};
|