| 1 | /* Test for ppoll timeout |
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| 2 | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <time.h> |
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| 20 | #include <poll.h> |
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| 21 | #include <errno.h> |
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| 22 | #include <intprops.h> |
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| 23 | #include <support/check.h> |
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| 24 | #include <support/xtime.h> |
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| 25 | #include <support/timespec.h> |
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| 26 | #include <support/support.h> |
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| 27 | #include <stdbool.h> |
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| 28 | |
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| 29 | static int test_ppoll_timeout (bool zero_tmo) |
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| 30 | { |
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| 31 | /* We wait for half a second. */ |
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| 32 | struct timespec ts; |
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| 33 | xclock_gettime (CLOCK_REALTIME, ts: &ts); |
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| 34 | struct timespec timeout = make_timespec (s: 0, ns: zero_tmo ? 0 : TIMESPEC_HZ/2); |
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| 35 | ts = timespec_add (ts, timeout); |
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| 36 | |
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| 37 | /* Ignore fds - just wait for timeout. */ |
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| 38 | struct pollfd fds = { -1, 0, 0 }; |
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| 39 | TEST_COMPARE (ppoll (&fds, 1, &timeout, 0), 0); |
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| 40 | |
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| 41 | TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts); |
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| 42 | |
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| 43 | return 0; |
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| 44 | } |
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| 45 | |
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| 46 | static void |
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| 47 | test_ppoll_large_timeout (void) |
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| 48 | { |
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| 49 | support_create_timer (sec: 0, nsec: 100000000, false, NULL); |
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| 50 | struct timespec ts = { TYPE_MAXIMUM (time_t), 0 }; |
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| 51 | struct pollfd fds = { -1, 0, 0 }; |
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| 52 | TEST_COMPARE (ppoll (&fds, 1, &ts, 0), -1); |
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| 53 | TEST_VERIFY (errno == EINTR || errno == EOVERFLOW); |
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| 54 | } |
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| 55 | |
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| 56 | static int |
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| 57 | do_test (void) |
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| 58 | { |
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| 59 | /* Check if ppoll exits immediately. */ |
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| 60 | test_ppoll_timeout (true); |
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| 61 | |
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| 62 | /* Check if ppoll exits after specified timeout. */ |
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| 63 | test_ppoll_timeout (false); |
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| 64 | |
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| 65 | /* Check if ppoll with large timeout. */ |
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| 66 | test_ppoll_large_timeout (); |
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| 67 | |
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| 68 | return 0; |
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| 69 | } |
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| 70 | |
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| 71 | #include <support/test-driver.c> |
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| 72 | |
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