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/*======================================================================
FILE: builtin_timezones.c
CREATOR: Milan Crha 26 November 2014
(C) COPYRIGHT 2014 Milan Crha <mcrha@redhat.com>
This library is free software; you can redistribute it and/or modify
it under the terms of either:
The LGPL as published by the Free Software Foundation, version
2.1, available at: https://www.gnu.org/licenses/lgpl-2.1.html
Or:
The Mozilla Public License Version 2.0. You may obtain a copy of
the License at https://www.mozilla.org/MPL/
======================================================================*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_PTHREAD_H
#include <pthread.h>
#include <assert.h>
#endif
#include "libical/ical.h"
#include <stdio.h>
#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD) && defined(HAVE_PTHREAD_CREATE)
#define N_THREADS 20
static pthread_mutex_t thread_comp_mutex = PTHREAD_MUTEX_INITIALIZER;
static const void *thread_comp = NULL;
static void *thread_func(void *user_data)
{
icaltimezone *zone = user_data;
icalcomponent *icalcomp;
if (!zone) {
return NULL;
}
icalcomp = icaltimezone_get_component(zone);
pthread_mutex_lock(&thread_comp_mutex);
if (!thread_comp) {
thread_comp = icalcomp;
} else {
assert(thread_comp == icalcomp);
}
pthread_mutex_unlock(&thread_comp_mutex);
/* Do not call the clone, it confuses the Thread Sanitizer, which
claims data race on the internal members of the icalcomp. */
/* icalcomp = icalcomponent_new_clone(icalcomp);
icalcomponent_free(icalcomp);
*/
return NULL;
}
static void test_get_component_threadsafety(void)
{
pthread_t thread[N_THREADS];
icaltimezone *zone;
int ii;
zone = icaltimezone_get_builtin_timezone("Europe/London");
for (ii = 0; ii < N_THREADS; ii++) {
pthread_create(&thread[ii], NULL, thread_func, zone);
}
for (ii = 0; ii < N_THREADS; ii++) {
pthread_join(thread[ii], NULL);
}
}
#endif
int main(void)
{
icalarray *builtin_timezones;
icaltimetype tt;
int dd, hh, zz, tried = 0;
long zz2 = -1;
set_zone_directory("../../zoneinfo");
icaltimezone_set_tzid_prefix("/softwarestudio.org/");
#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD) && defined(HAVE_PTHREAD_CREATE)
test_get_component_threadsafety();
#endif
tt = icaltime_current_time_with_zone(icaltimezone_get_builtin_timezone("America/New_York"));
tt.year = 2038;
(void)icaltime_as_timet_with_zone(tt, icaltimezone_get_builtin_timezone("PST"));
tried++;
tt.year = 2050;
(void)icaltime_as_timet_with_zone(tt, icaltimezone_get_builtin_timezone("PST"));
tried++;
tt.year = 1958;
(void)icaltime_as_timet_with_zone(tt, icaltimezone_get_builtin_timezone("PST"));
tried++;
builtin_timezones = icaltimezone_get_builtin_timezones();
printf("got %lu zones\n", (unsigned long)builtin_timezones->num_elements);
if (builtin_timezones->num_elements == 0) {
printf("YIKES. Try running from the build/bin directory\n");
return(1);
}
for (zz = -1; zz < (int)builtin_timezones->num_elements; zz++) {
icaltimezone *zone;
if (zz < 0) {
zone = icaltimezone_get_utc_timezone();
} else {
zone = icalarray_element_at(builtin_timezones, (size_t)zz);
}
tt = icaltime_current_time_with_zone(zone);
for (dd = 0; dd < 370; dd += 17) {
for (hh = 0; hh < 60 * 60 * 24; hh += 567) {
int zz2cnt;
icaltime_adjust(&tt, 0, 0, 0, 1);
for (zz2cnt = 0; zz2cnt < 15; zz2cnt++) {
icaltimezone *zone2;
if (zz2 < 0) {
zone2 = icaltimezone_get_utc_timezone();
} else {
zone2 = icalarray_element_at(builtin_timezones, (size_t)zz2);
}
(void)icaltime_as_timet_with_zone(tt, zone2);
tried++;
zz2++;
if (zz2 >= (long)builtin_timezones->num_elements)
zz2 = -1;
}
}
}
printf("\r%lu %% done",
(zz >= 0 ? zz : 0) * 100 / (unsigned long)builtin_timezones->num_elements);
fflush(stdout);
}
printf("\ntried %d times\n", tried);
return 0;
}
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