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#include <stdio.h>
#include <assert.h>
#include <threads.h>
once_flag flag = ONCE_FLAG_INIT;
_Atomic int counter = 0;
void do_once(void) {
counter++;
printf("in do_once\n");
}
int thread_main(void* arg) {
printf("in thread_main %p\n", thrd_current());
call_once(&flag, do_once);
printf("done thread_main\n");
return 42;
}
int run_with_exit(void* arg) {
thrd_yield();
thrd_exit(43);
}
int main(int argc, char* argv[]) {
int result = 0;
printf("thrd_current: %p\n", thrd_current());
// Test call_once
thrd_t t1;
thrd_t t2;
thrd_t t3;
thrd_t t4;
thrd_create(&t1, thread_main, NULL);
thrd_create(&t2, thread_main, NULL);
thrd_create(&t3, thread_main, NULL);
thrd_create(&t4, thread_main, NULL);
assert(!thrd_equal(t1, t2));
assert(thrd_equal(t1, t1));
thrd_join(t1, &result);
thrd_join(t2, &result);
thrd_join(t3, &result);
thrd_join(t4, &result);
assert(result == 42);
assert(counter == 1);
// Test thrd_exit return value
thrd_t t5;
thrd_create(&t5, run_with_exit, NULL);
thrd_join(t5, &result);
assert(result == 43);
// Test thrd_detach
thrd_t t6;
thrd_create(&t6, thread_main, NULL);
thrd_detach(t6);
#ifdef REPORT_RESULT
REPORT_RESULT(0);
#endif
printf("done!\n");
return 0;
}
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