embb_counter_t* embb_thread_index_counter() {
int compare_to = 0;
if (embb_atomic_load_int(&embb_thread_index_counter_flag) != 2) {
if (embb_atomic_compare_and_swap_int(
&embb_thread_index_counter_flag, &compare_to, 1)) {
embb_counter_init(&embb_thread_index_counter_index);
embb_atomic_store_int(&embb_thread_index_counter_flag, 2);
}
while (embb_atomic_load_int(&embb_thread_index_counter_flag) != 2) {}
}
return &embb_thread_index_counter_index;
}
/**
* \pre the calling thread is the only active thread
*
* \post the thread indices count and calling thread index is reset
*/
void embb_internal_thread_index_reset() {
/** This function is only called in tests, usually when all other threads
* except the main thread have terminated. However, the main thread still has
* potentially stored its old index value in its thread local storage,
* which might be assigned additionally to another thread (as the counter is
* reset), which may lead to hard to detect bugs. Therefore, reset the thread
* local thread id here.
*/
embb_internal_thread_index_var = UINT_MAX;
embb_counter_init(embb_thread_index_counter());
}
void embb_internal_thread_index_reset() {
embb_counter_init(embb_thread_index_counter());
}