mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 00:31:08 +00:00
189 lines
7.4 KiB
C
189 lines
7.4 KiB
C
/* Tests for computing deadlines for timeouts.
|
|
Copyright (C) 2017-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <inet/net-internal.h>
|
|
#include <limits.h>
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <support/check.h>
|
|
|
|
/* Find the maximum value which can be represented in a time_t. */
|
|
static time_t
|
|
time_t_max (void)
|
|
{
|
|
_Static_assert (0 > (time_t) -1, "time_t is signed");
|
|
uintmax_t current = 1;
|
|
while (true)
|
|
{
|
|
uintmax_t next = current * 2;
|
|
/* This cannot happen because time_t is signed. */
|
|
TEST_VERIFY_EXIT (next > current);
|
|
++next;
|
|
if ((time_t) next < 0 || next != (uintmax_t) (time_t) next)
|
|
/* Value cannot be represented in time_t. Return the previous
|
|
value. */
|
|
return current;
|
|
current = next;
|
|
}
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
{
|
|
struct deadline_current_time current_time = __deadline_current_time ();
|
|
TEST_VERIFY (current_time.current.tv_sec >= 0);
|
|
current_time = __deadline_current_time ();
|
|
/* Due to CLOCK_MONOTONIC, either seconds or nanoseconds are
|
|
greater than zero. This is also true for the gettimeofday
|
|
fallback. */
|
|
TEST_VERIFY (current_time.current.tv_sec >= 0);
|
|
TEST_VERIFY (current_time.current.tv_sec > 0
|
|
|| current_time.current.tv_nsec > 0);
|
|
}
|
|
|
|
/* Check basic computations of deadlines. */
|
|
struct deadline_current_time current_time = { { 1, 123456789 } };
|
|
struct deadline deadline = __deadline_from_timeval
|
|
(current_time, (struct timeval) { 0, 1 });
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 1);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 123457789);
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 1);
|
|
|
|
deadline = __deadline_from_timeval
|
|
(current_time, ((struct timeval) { 0, 2 }));
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 1);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 123458789);
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 1);
|
|
|
|
deadline = __deadline_from_timeval
|
|
(current_time, ((struct timeval) { 1, 0 }));
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 2);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 123456789);
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 1000);
|
|
|
|
/* Check if timeouts are correctly rounded up to the next
|
|
millisecond. */
|
|
for (int i = 0; i < 999999; ++i)
|
|
{
|
|
++current_time.current.tv_nsec;
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 1000);
|
|
}
|
|
|
|
/* A full millisecond has elapsed, so the time to the deadline is
|
|
now less than 1000. */
|
|
++current_time.current.tv_nsec;
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 999);
|
|
|
|
/* Check __deadline_to_ms carry-over. */
|
|
current_time = (struct deadline_current_time) { { 9, 123456789 } };
|
|
deadline = (struct deadline) { { 10, 122456789 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 999);
|
|
deadline = (struct deadline) { { 10, 122456790 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 1000);
|
|
deadline = (struct deadline) { { 10, 123456788 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 1000);
|
|
deadline = (struct deadline) { { 10, 123456789 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 1000);
|
|
|
|
/* Check __deadline_to_ms overflow. */
|
|
deadline = (struct deadline) { { INT_MAX - 1, 1 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == INT_MAX);
|
|
|
|
/* Check __deadline_to_ms for elapsed deadlines. */
|
|
current_time = (struct deadline_current_time) { { 9, 123456789 } };
|
|
deadline.absolute = current_time.current;
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 0);
|
|
current_time = (struct deadline_current_time) { { 9, 123456790 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 0);
|
|
current_time = (struct deadline_current_time) { { 10, 0 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 0);
|
|
current_time = (struct deadline_current_time) { { 10, 123456788 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 0);
|
|
current_time = (struct deadline_current_time) { { 10, 123456789 } };
|
|
TEST_VERIFY (__deadline_to_ms (current_time, deadline) == 0);
|
|
|
|
/* Check carry-over in __deadline_from_timeval. */
|
|
current_time = (struct deadline_current_time) { { 9, 998000001 } };
|
|
for (int i = 0; i < 2000; ++i)
|
|
{
|
|
deadline = __deadline_from_timeval
|
|
(current_time, (struct timeval) { 1, i });
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 10);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 998000001 + i * 1000);
|
|
}
|
|
for (int i = 2000; i < 3000; ++i)
|
|
{
|
|
deadline = __deadline_from_timeval
|
|
(current_time, (struct timeval) { 2, i });
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 12);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 1 + (i - 2000) * 1000);
|
|
}
|
|
|
|
/* Check infinite deadlines. */
|
|
deadline = __deadline_from_timeval
|
|
((struct deadline_current_time) { { 0, 1000 * 1000 * 1000 - 1000 } },
|
|
(struct timeval) { time_t_max (), 1 });
|
|
TEST_VERIFY (__deadline_is_infinite (deadline));
|
|
deadline = __deadline_from_timeval
|
|
((struct deadline_current_time) { { 0, 1000 * 1000 * 1000 - 1001 } },
|
|
(struct timeval) { time_t_max (), 1 });
|
|
TEST_VERIFY (!__deadline_is_infinite (deadline));
|
|
deadline = __deadline_from_timeval
|
|
((struct deadline_current_time)
|
|
{ { time_t_max (), 1000 * 1000 * 1000 - 1000 } },
|
|
(struct timeval) { 0, 1 });
|
|
TEST_VERIFY (__deadline_is_infinite (deadline));
|
|
deadline = __deadline_from_timeval
|
|
((struct deadline_current_time)
|
|
{ { time_t_max () / 2 + 1, 0 } },
|
|
(struct timeval) { time_t_max () / 2 + 1, 0 });
|
|
TEST_VERIFY (__deadline_is_infinite (deadline));
|
|
|
|
/* Check __deadline_first behavior. */
|
|
deadline = __deadline_first
|
|
((struct deadline) { { 1, 2 } },
|
|
(struct deadline) { { 1, 3 } });
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 1);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 2);
|
|
deadline = __deadline_first
|
|
((struct deadline) { { 1, 3 } },
|
|
(struct deadline) { { 1, 2 } });
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 1);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 2);
|
|
deadline = __deadline_first
|
|
((struct deadline) { { 1, 2 } },
|
|
(struct deadline) { { 2, 1 } });
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 1);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 2);
|
|
deadline = __deadline_first
|
|
((struct deadline) { { 1, 2 } },
|
|
(struct deadline) { { 2, 4 } });
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 1);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 2);
|
|
deadline = __deadline_first
|
|
((struct deadline) { { 2, 4 } },
|
|
(struct deadline) { { 1, 2 } });
|
|
TEST_VERIFY (deadline.absolute.tv_sec == 1);
|
|
TEST_VERIFY (deadline.absolute.tv_nsec == 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|