/** Helper function for threading unit tests: This function runs in a
* subthread. It grabs its own mutex (start1 or start2) to make sure that it
* should start, then it repeatedly alters _test_thread_strmap protected by
* thread_test_mutex_. */
static void
thread_test_func_(void* _s)
{
char *s = _s;
int i, *count;
tor_mutex_t *m;
char buf[64];
char **cp;
if (!strcmp(s, "thread 1")) {
m = thread_test_start1_;
cp = &thread1_name_;
count = &t1_count;
thread_fn_tid1 = tor_get_thread_id();
} else {
m = thread_test_start2_;
cp = &thread2_name_;
count = &t2_count;
thread_fn_tid2 = tor_get_thread_id();
}
tor_snprintf(buf, sizeof(buf), "%lu", tor_get_thread_id());
*cp = tor_strdup(buf);
tor_mutex_acquire(m);
for (i=0; i<10000; ++i) {
tor_mutex_acquire(thread_test_mutex_);
strmap_set(thread_test_strmap_, "last to run", *cp);
++*count;
tor_mutex_release(thread_test_mutex_);
}
tor_mutex_acquire(thread_test_mutex_);
strmap_set(thread_test_strmap_, s, *cp);
if (in_main_thread())
++thread_fns_failed;
tor_mutex_release(thread_test_mutex_);
tor_mutex_release(m);
spawn_exit();
}
/** Return true iff called from the main thread. */
int
in_main_thread(void)
{
return main_thread_id == tor_get_thread_id();
}
/** Start considering the current thread to be the 'main thread'. This has
* no effect on anything besides in_main_thread(). */
void
set_main_thread(void)
{
main_thread_id = tor_get_thread_id();
}
