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e2c0794d13
This change adds new test to assess ppoll()'s timeout related functionality (the struct pollfd does not provide valid fd to wait for - just wait for timeout). To be more specific - two use cases are checked: - if ppoll() times out immediately when passed struct timespec has zero values of tv_nsec and tv_sec. - if ppoll() times out after timeout specified in passed argument
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* Test for ppoll timeout
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <time.h>
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#include <poll.h>
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#include <errno.h>
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#include <support/check.h>
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#include <support/xtime.h>
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#include <support/timespec.h>
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#include <stdbool.h>
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static int test_ppoll_timeout (bool zero_tmo)
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{
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/* We wait for half a second. */
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struct timespec ts;
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xclock_gettime (CLOCK_REALTIME, &ts);
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struct timespec timeout = make_timespec (0, zero_tmo ? 0 : TIMESPEC_HZ/2);
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ts = timespec_add (ts, timeout);
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/* Ignore fds - just wait for timeout. */
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struct pollfd fds = { -1, 0, 0 };
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TEST_COMPARE (ppoll (&fds, 1, &timeout, 0), 0);
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TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts);
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return 0;
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}
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static int
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do_test (void)
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{
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/* Check if ppoll exits immediately. */
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test_ppoll_timeout (true);
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/* Check if ppoll exits after specified timeout. */
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test_ppoll_timeout (false);
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return 0;
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}
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#include <support/test-driver.c>
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