160 lines
4 KiB
C
160 lines
4 KiB
C
/* Multithread-safety test for localtime_r().
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Copyright (C) 2024-2025 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2024. */
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#include <config.h>
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/* Work around GCC bug 44511. */
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#if _GL_GNUC_PREREQ (4, 3)
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# pragma GCC diagnostic ignored "-Wreturn-type"
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#endif
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#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
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/* Specification. */
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#include <time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "glthread/thread.h"
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#include "macros.h"
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/* Some common time zone name. */
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#if defined _WIN32 && !defined __CYGWIN__
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/* Cf. <https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/default-time-zones>
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or <https://ss64.com/timezones.html> */
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# define FRENCH_TZ "Romance Standard Time"
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#else
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/* Cf. <https://en.wikipedia.org/wiki/List_of_tz_database_time_zones> */
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# define FRENCH_TZ "Europe/Paris"
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#endif
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static void *
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thread1_func (void *arg)
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{
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for (;;)
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{
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time_t t = 1178467200; /* 2007-05-06 18:00:00 */
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struct tm tm;
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struct tm *result = localtime_r (&t, &tm);
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ASSERT (result == &tm);
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if (!(result->tm_sec == 0
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&& result->tm_min == 0
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&& result->tm_hour == 18
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&& result->tm_mday == 6
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&& result->tm_mon == 5 - 1
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&& result->tm_year == 2007 - 1900
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&& result->tm_wday == 0
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&& result->tm_yday == 125
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&& result->tm_isdst == 1))
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{
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fprintf (stderr, "thread1 disturbed by thread2!\n"); fflush (stderr);
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abort ();
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}
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}
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/*NOTREACHED*/
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}
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static void *
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thread2_func (void *arg)
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{
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for (;;)
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{
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time_t t = 1336320000; /* 2012-05-06 18:00:00 */
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struct tm tm;
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struct tm *result = localtime_r (&t, &tm);
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ASSERT (result == &tm);
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if (!(result->tm_sec == 0
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&& result->tm_min == 0
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&& result->tm_hour == 18
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&& result->tm_mday == 6
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&& result->tm_mon == 5 - 1
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&& result->tm_year == 2012 - 1900
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&& result->tm_wday == 0
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&& result->tm_yday == 126
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&& result->tm_isdst == 1))
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{
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fprintf (stderr, "thread2 disturbed by thread1!\n"); fflush (stderr);
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abort ();
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}
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}
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/*NOTREACHED*/
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}
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int
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main (int argc, char *argv[])
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{
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setenv ("TZ", FRENCH_TZ, 1);
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/* Check that this TZ works. */
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{
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time_t t = 0; /* 1970-01-01 01:00:00 */
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struct tm *result = localtime (&t);
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if (! (result
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&& result->tm_sec == 0
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&& result->tm_min == 0
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&& result->tm_hour == 1
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&& result->tm_mday == 1
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&& result->tm_mon == 1 - 1
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&& result->tm_year == 1970 - 1900
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&& result->tm_wday == 4
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&& result->tm_yday == 0
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&& result->tm_isdst == 0))
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{
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fputs ("Skipping test: TZ='" FRENCH_TZ "' is not Paris time\n",
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stderr);
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return 77;
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}
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}
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/* Create the threads. */
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gl_thread_create (thread1_func, NULL);
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gl_thread_create (thread2_func, NULL);
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/* Let them run for 1 second. */
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{
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struct timespec duration;
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duration.tv_sec = (argc > 1 ? atoi (argv[1]) : 1);
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duration.tv_nsec = 0;
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nanosleep (&duration, NULL);
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}
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return test_exit_status;
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}
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#else
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/* No multithreading available. */
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#include <stdio.h>
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int
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main ()
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{
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fputs ("Skipping test: multithreading not enabled\n", stderr);
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return 77;
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}
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#endif
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